WO2004036879A2 - Filter for segmenting power lines for communications - Google Patents

Filter for segmenting power lines for communications Download PDF

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Publication number
WO2004036879A2
WO2004036879A2 PCT/US2003/033081 US0333081W WO2004036879A2 WO 2004036879 A2 WO2004036879 A2 WO 2004036879A2 US 0333081 W US0333081 W US 0333081W WO 2004036879 A2 WO2004036879 A2 WO 2004036879A2
Authority
WO
WIPO (PCT)
Prior art keywords
resonant circuit
power line
coil
signal
magnetic core
Prior art date
Application number
PCT/US2003/033081
Other languages
French (fr)
Other versions
WO2004036879A3 (en
Inventor
Yehuda Cern
Original Assignee
Ambient Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ambient Corporation filed Critical Ambient Corporation
Priority to EP03809154A priority Critical patent/EP1556947A4/en
Priority to CA002502122A priority patent/CA2502122A1/en
Priority to AU2003277438A priority patent/AU2003277438A1/en
Priority to EA200500668A priority patent/EA200500668A1/en
Priority to BR0315356-8A priority patent/BR0315356A/en
Priority to MXPA05003903A priority patent/MXPA05003903A/en
Priority to JP2004545508A priority patent/JP2006507721A/en
Publication of WO2004036879A2 publication Critical patent/WO2004036879A2/en
Publication of WO2004036879A3 publication Critical patent/WO2004036879A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/542—Systems for transmission via power distribution lines the information being in digital form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/02—Adaptations of transformers or inductances for specific applications or functions for non-linear operation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/32—Non-reciprocal transmission devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0138—Electrical filters or coupling circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/36—Repeater circuits
    • H04B3/38—Repeater circuits for signals in two different frequency ranges transmitted in opposite directions over the same transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/06—Fixed inductances of the signal type  with magnetic core with core substantially closed in itself, e.g. toroid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H01F2038/143—Inductive couplings for signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H2001/0092—Inductor filters, i.e. inductors whose parasitic capacitance is of relevance to consider it as filter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H2007/013—Notch or bandstop filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5408—Methods of transmitting or receiving signals via power distribution lines using protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5425—Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5479—Systems for power line communications using repeaters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5483—Systems for power line communications using coupling circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5491—Systems for power line communications using filtering and bypassing

Definitions

  • the present invention relates to power line communications, and more particularly, to a technique for blocking a portion of energy of a signal, e.g., a spurious signal in a power line.
  • Power line communications systems may send data signals over multiple sets of proximate lines, such as medium voltage and low voltage lines strung on the same utility poles or multiple sets of lines of the same voltage class on the same poles. Over distances of hundreds of meters, there can be significant induction of signal from one set of lines to another, and these induced signals can appear to modem receivers as background noise.
  • the induced signal strength is a function of the cumulative distance that the lines run together.
  • This induced signal which is a spurious signal, can be attenuated by interrupting the continuity of the line for the relevant frequencies. This interruption can be achieved by attaching filters in series with the lines, the filters having a high impedance at the frequencies of interest. Usually, interrupting a power line circuit and service to customers is unacceptable.
  • the method includes equipping a high frequency magnetic core with a coil, connecting a capacitor across terminals of the coil to create a resonant circuit that resonates at a frequency of the signal, and placing the magnetic core around the power line, at a location where the blocking is desired.
  • FIG. 1 is an illustration of a physical attachment of a filter to a power line.
  • FIG. 2 is a schematic diagram of two filters attached to a power line.
  • FIG. 3 is a plot of attenuation of signals by the filters of FIG. 2.
  • a signal filter in accordance with the present invention achieves segmentation of lines over specific frequency bands, without interrupting service.
  • a series-connected filter in the form of a filter ,i.e. a clamp-on filter, is clamped onto an energized power line.
  • the clamp-on filter includes a split magnetic core and a secondary coil, across which a capacitor is connected so as to create a parallel resonant circuit.
  • the impedance of the parallel resonant circuit is coupled into the power line circuit, thus introducing a series impedance having a magnitude that is substantial over a particular frequency band.
  • the filter reduces the magnitude of spurious current flowing in the power line.
  • the width of a communications frequency band is typically wider than a resonance band achieved by a single LC circuit.
  • a wider band-blocking filter can be achieved by using two or more such clamp-on transformer- filters, each tuned to a slightly different frequency. Typically, greater than 10 dB attenuation can be obtained from one set of two or more such filters.
  • a transformer is formed by the core, power line, and secondary winding. Conditions for effective coupling of the filtering impedance into the power line include a high transformer coupling coefficient, exceeding approximately 0.7.
  • the core material for the transformer, and an optional air gap between the core halves, are chosen so that the filter does not saturate, for power currents up to the maximum flowing through the line.
  • FIG. 1 is an illustration of a filter clamped around a power line 99.
  • a core is configured of core halves 105 and 110, which are clamped around power line 99.
  • core halves 105 and 110 are separated by a gap 115.
  • Power line 99 serves as a primary winding, and a secondary winding 120 of one or more turns passes through the core, and is connected to a capacitor 125.
  • the value of capacitor 125 is selected to resonate with the inductance of secondary winding 120 in the frequency band intended to be blocked by the filter.
  • FIG. 2 is a schematic of a power line with two filters attached, in accordance with the present invention.
  • the power line is represented by segments 100 and 101 of transmission lines.
  • a signal source 130 with its internal impedance represent a spurious signal coupled to segment 100 from a power line network to the left of segment 100.
  • a signal emerging from segment 101 is measured across a termination resistance 135, representing power lines continuing to the right.
  • Clamp-on filters 140 and 145 are tuned to slightly different frequencies within the frequency band of the spurious signal, providing a broadened frequency blocking capability, preventing a significant proportion of the spurious signal energy from reaching power line segment 101 and further points downstream represented by termination resistance 135.
  • Filter 140 includes a transformer 150 with segment 100 serving as a primary winding 155, and a wire serving as a secondary winding 160 (see FIG. 1, reference 120).
  • a resistor 165 represents the copper and core losses.
  • a capacitor 170 resonates with secondary winding 160 at a frequency in a desired stop band.
  • Filters 140 and 145 act together as a composite filter. They differ only in their slightly different resonant frequencies, to widen the frequency band over which the composite filter operates. While two filters are shown in FIG. 1, a single filter may suffice for a relatively narrowband signal, or may be extended to more than two filters for a wider signal.
  • FIG. 3 is a graph showing a simulation of a filter response for the circuit in FIG. 2.
  • the values used for the simulation are: source, load and power line impedances are each 200 ohms, the filter primary and secondary inductances are each 1 microhenry, the coupling coefficient is 0.7, capacitor 160 is 50 pF, capacitor is 57 pF, and the loss resistance is 5 ohms.
  • the simulation shows that the composite filter attenuates signals in the 21.1 to 23.4 MHz band by more than 10 dB, and allows signals outside the attenuation band to pass through relatively unimpeded.
  • the method includes (a) equipping a high frequency magnetic core with a coil, (b) connecting a capacitor across terminals of the coil to create a resonant circuit that resonates at a frequency of the signal, and (c) placing the magnetic core around the power line, at a location where the blocking is desired.
  • the core may have an air gap.
  • the method can also include performing the equipping, the connecting and the placing to provide a second resonant circuit tuned to a different frequency than the first resonant circuit to create a second frequency band blocking characteristic that is wider than the first frequency band blocking characteristic.

Abstract

There is provided a method for blocking a portion of energy of a signal in a power line. The method includes equipping a high frequency magnetic core with a coil, connecting a capacitor across terminals of the coil to create a resonant circuit that resonates at a frequency of the signal, and placing the magnetic core around the power line, at a location where the blocking is desired.

Description

FILTER FOR SEGMENTING POWER LINES FOR COMMUNICATIONS
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to power line communications, and more particularly, to a technique for blocking a portion of energy of a signal, e.g., a spurious signal in a power line.
2. Description of the Related Art
Power line communications systems may send data signals over multiple sets of proximate lines, such as medium voltage and low voltage lines strung on the same utility poles or multiple sets of lines of the same voltage class on the same poles. Over distances of hundreds of meters, there can be significant induction of signal from one set of lines to another, and these induced signals can appear to modem receivers as background noise.
To some extent, the induced signal strength is a function of the cumulative distance that the lines run together. This induced signal, which is a spurious signal, can be attenuated by interrupting the continuity of the line for the relevant frequencies. This interruption can be achieved by attaching filters in series with the lines, the filters having a high impedance at the frequencies of interest. Usually, interrupting a power line circuit and service to customers is unacceptable.
SUMMARY OF THE INVENTION
There is provided a method for blocking a portion of energy of a signal in a power line. The method includes equipping a high frequency magnetic core with a coil, connecting a capacitor across terminals of the coil to create a resonant circuit that resonates at a frequency of the signal, and placing the magnetic core around the power line, at a location where the blocking is desired.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an illustration of a physical attachment of a filter to a power line.
FIG. 2 is a schematic diagram of two filters attached to a power line.
FIG. 3 is a plot of attenuation of signals by the filters of FIG. 2.
DESCRIPTION OF THE INVENTION
A signal filter in accordance with the present invention achieves segmentation of lines over specific frequency bands, without interrupting service. A series-connected filter, in the form of a filter ,i.e. a clamp-on filter, is clamped onto an energized power line. The clamp-on filter includes a split magnetic core and a secondary coil, across which a capacitor is connected so as to create a parallel resonant circuit. The impedance of the parallel resonant circuit is coupled into the power line circuit, thus introducing a series impedance having a magnitude that is substantial over a particular frequency band. When the particular frequency band includes the spurious signal frequency, the filter reduces the magnitude of spurious current flowing in the power line.
For spread spectrum communications, the width of a communications frequency band is typically wider than a resonance band achieved by a single LC circuit. A wider band-blocking filter can be achieved by using two or more such clamp-on transformer- filters, each tuned to a slightly different frequency. Typically, greater than 10 dB attenuation can be obtained from one set of two or more such filters. A transformer is formed by the core, power line, and secondary winding. Conditions for effective coupling of the filtering impedance into the power line include a high transformer coupling coefficient, exceeding approximately 0.7. The core material for the transformer, and an optional air gap between the core halves, are chosen so that the filter does not saturate, for power currents up to the maximum flowing through the line.
FIG. 1 is an illustration of a filter clamped around a power line 99. A core is configured of core halves 105 and 110, which are clamped around power line 99. Optionally, core halves 105 and 110 are separated by a gap 115. Power line 99 serves as a primary winding, and a secondary winding 120 of one or more turns passes through the core, and is connected to a capacitor 125. The value of capacitor 125 is selected to resonate with the inductance of secondary winding 120 in the frequency band intended to be blocked by the filter.
FIG. 2 is a schematic of a power line with two filters attached, in accordance with the present invention. The power line is represented by segments 100 and 101 of transmission lines. A signal source 130 with its internal impedance represent a spurious signal coupled to segment 100 from a power line network to the left of segment 100. A signal emerging from segment 101 is measured across a termination resistance 135, representing power lines continuing to the right.
Clamp-on filters 140 and 145 are tuned to slightly different frequencies within the frequency band of the spurious signal, providing a broadened frequency blocking capability, preventing a significant proportion of the spurious signal energy from reaching power line segment 101 and further points downstream represented by termination resistance 135. Filter 140 includes a transformer 150 with segment 100 serving as a primary winding 155, and a wire serving as a secondary winding 160 (see FIG. 1, reference 120). A resistor 165 represents the copper and core losses. A capacitor 170 resonates with secondary winding 160 at a frequency in a desired stop band. Filters 140 and 145 act together as a composite filter. They differ only in their slightly different resonant frequencies, to widen the frequency band over which the composite filter operates. While two filters are shown in FIG. 1, a single filter may suffice for a relatively narrowband signal, or may be extended to more than two filters for a wider signal.
FIG. 3 is a graph showing a simulation of a filter response for the circuit in FIG. 2. The values used for the simulation are: source, load and power line impedances are each 200 ohms, the filter primary and secondary inductances are each 1 microhenry, the coupling coefficient is 0.7, capacitor 160 is 50 pF, capacitor is 57 pF, and the loss resistance is 5 ohms. The simulation shows that the composite filter attenuates signals in the 21.1 to 23.4 MHz band by more than 10 dB, and allows signals outside the attenuation band to pass through relatively unimpeded.
There is thus provided a method for blocking a portion of energy of a signal in a power line. The method includes (a) equipping a high frequency magnetic core with a coil, (b) connecting a capacitor across terminals of the coil to create a resonant circuit that resonates at a frequency of the signal, and (c) placing the magnetic core around the power line, at a location where the blocking is desired. The core may have an air gap. Also, if the resonant circuit is regarded as a first resonant circuit having a first frequency band blocking characteristic, the method can also include performing the equipping, the connecting and the placing to provide a second resonant circuit tuned to a different frequency than the first resonant circuit to create a second frequency band blocking characteristic that is wider than the first frequency band blocking characteristic.
It should be understood that various alternatives, combinations and modifications of the teachings described herein could be devised by those skilled in the art. The present invention is intended to embrace all such alternatives, modifications and variances that fall within the scope of the appended claims.

Claims

WHAT IS CLAIMED IS:
1. A method for blocking a portion of energy of a signal in a power line, comprising: equipping a high frequency magnetic core with a coil; connecting a capacitor across terminals of said coil to create a resonant circuit that resonates at a frequency of said signal; and placing said magnetic core around said power line at a location where said blocking is desired.
2. The method of claim 1, wherein said core includes an air gap.
3. The method of claim 1, wherein said resonant circuit is a first resonant circuit having a first frequency band blocking characteristic, and wherein said method further comprises performing said equipping, said connecting and said placing to provide a second resonant circuit tuned to a different frequency than said first resonant circuit to create a second frequency band blocking characteristic that is wider than said first frequency band blocking characteristic.
4. An apparatus for blocking a portion of energy of a signal in a power line, comprising: a high frequency magnetic core with a coil; and a capacitor connected across terminals of said coil to create a resonant circuit that resonates at a frequency of said signal, wherein said magnetic core is placed around said power line at a location where said blocking is desired.
5. The apparatus of claim 4, wherein said core includes an air gap.
6. The apparatus of claim 4, wherein said magnetic core is a first magnetic core, said coil is a first coil, and said capacitor is a first capacitor, wherein said resonant circuit is a first resonant circuit having a first frequency band blocking characteristic, and wherein said apparatus further comprises: a second high frequency magnetic core with a second coil; and a second capacitor connected across terminals of said second coil to provide a second resonant circuit tuned to a different frequency than said first resonant circuit to create a second frequency band blocking characteristic that is wider than said first frequency band blocking characteristic.
PCT/US2003/033081 2002-10-17 2003-10-17 Filter for segmenting power lines for communications WO2004036879A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP03809154A EP1556947A4 (en) 2002-10-17 2003-10-17 Filter for segmenting power lines for communications
CA002502122A CA2502122A1 (en) 2002-10-17 2003-10-17 Filter for segmenting power lines for communications
AU2003277438A AU2003277438A1 (en) 2002-10-17 2003-10-17 Filter for segmenting power lines for communications
EA200500668A EA200500668A1 (en) 2002-10-17 2003-10-17 FILTER FOR SEGMENTATION OF ELECTRICAL TRANSMISSION LINES
BR0315356-8A BR0315356A (en) 2002-10-17 2003-10-17 Filter to segment power lines in communications
MXPA05003903A MXPA05003903A (en) 2002-10-17 2003-10-17 Filter for segmenting power lines for communications.
JP2004545508A JP2006507721A (en) 2002-10-17 2003-10-17 Filter for segmenting communication power lines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US41917402P 2002-10-17 2002-10-17
US60/419,174 2002-10-17

Publications (2)

Publication Number Publication Date
WO2004036879A2 true WO2004036879A2 (en) 2004-04-29
WO2004036879A3 WO2004036879A3 (en) 2004-09-30

Family

ID=32108037

Family Applications (4)

Application Number Title Priority Date Filing Date
PCT/US2003/033082 WO2004036813A2 (en) 2002-10-17 2003-10-17 Repeaters sharing a common medium for communications
PCT/US2003/033188 WO2004036601A2 (en) 2002-10-17 2003-10-17 Highly insulated inductive data couplers
PCT/US2003/033080 WO2004036772A2 (en) 2002-10-17 2003-10-17 Arrangement of a data coupler for power line communications
PCT/US2003/033081 WO2004036879A2 (en) 2002-10-17 2003-10-17 Filter for segmenting power lines for communications

Family Applications Before (3)

Application Number Title Priority Date Filing Date
PCT/US2003/033082 WO2004036813A2 (en) 2002-10-17 2003-10-17 Repeaters sharing a common medium for communications
PCT/US2003/033188 WO2004036601A2 (en) 2002-10-17 2003-10-17 Highly insulated inductive data couplers
PCT/US2003/033080 WO2004036772A2 (en) 2002-10-17 2003-10-17 Arrangement of a data coupler for power line communications

Country Status (11)

Country Link
US (5) US6844810B2 (en)
EP (4) EP1556947A4 (en)
JP (4) JP4361488B2 (en)
KR (4) KR100991921B1 (en)
CN (4) CN1706175A (en)
AU (3) AU2003301390A1 (en)
BR (4) BR0315356A (en)
CA (4) CA2502107A1 (en)
EA (4) EA200500668A1 (en)
MX (4) MXPA05004090A (en)
WO (4) WO2004036813A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006012681A1 (en) * 2004-08-02 2006-02-09 Donald Malcolm Ross Yelland Method and device for power line head-end data transmission

Families Citing this family (162)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6480510B1 (en) 1998-07-28 2002-11-12 Serconet Ltd. Local area network of serial intelligent cells
US7176786B2 (en) * 2000-01-20 2007-02-13 Current Technologies, Llc Method of isolating data in a power line communications network
US6549616B1 (en) 2000-03-20 2003-04-15 Serconet Ltd. Telephone outlet for implementing a local area network over telephone lines and a local area network using such outlets
US6998962B2 (en) * 2000-04-14 2006-02-14 Current Technologies, Llc Power line communication apparatus and method of using the same
US6965302B2 (en) * 2000-04-14 2005-11-15 Current Technologies, Llc Power line communication system and method of using the same
US6842459B1 (en) * 2000-04-19 2005-01-11 Serconet Ltd. Network combining wired and non-wired segments
US20020002040A1 (en) * 2000-04-19 2002-01-03 Kline Paul A. Method and apparatus for interfacing RF signals to medium voltage power lines
US7248148B2 (en) * 2000-08-09 2007-07-24 Current Technologies, Llc Power line coupling device and method of using the same
US7245201B1 (en) 2000-08-09 2007-07-17 Current Technologies, Llc Power line coupling device and method of using the same
US7245472B2 (en) * 2001-05-18 2007-07-17 Curretn Grid, Llc Medium voltage signal coupling structure for last leg power grid high-speed data network
US7102478B2 (en) * 2002-06-21 2006-09-05 Current Technologies, Llc Power line coupling device and method of using the same
US6982611B2 (en) * 2002-06-24 2006-01-03 Current Technologies, Llc Power line coupling device and method of using the same
CA2502107A1 (en) * 2002-10-17 2004-04-29 Ambient Corporation Repeaters sharing a common medium for communications
IL152824A (en) 2002-11-13 2012-05-31 Mosaid Technologies Inc Addressable outlet and a network using same
US6965303B2 (en) * 2002-12-10 2005-11-15 Current Technologies, Llc Power line communication system and method
US7075414B2 (en) * 2003-05-13 2006-07-11 Current Technologies, Llc Device and method for communicating data signals through multiple power line conductors
US6980090B2 (en) * 2002-12-10 2005-12-27 Current Technologies, Llc Device and method for coupling with electrical distribution network infrastructure to provide communications
US6980091B2 (en) * 2002-12-10 2005-12-27 Current Technologies, Llc Power line communication system and method of operating the same
US7046124B2 (en) * 2003-01-21 2006-05-16 Current Technologies, Llc Power line coupling device and method of using the same
NO20040110L (en) * 2004-01-09 2005-07-11 Geir Monsen Vavik Signal repeater system
IL160417A (en) * 2004-02-16 2011-04-28 Mosaid Technologies Inc Outlet add-on module
US7286026B2 (en) * 2004-09-02 2007-10-23 Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. Serial signal injection using capacitive and transformer couplings for power line communications
US7170367B2 (en) * 2004-10-25 2007-01-30 Ambient Corporation Inductive coupler for power line communications
US7873058B2 (en) 2004-11-08 2011-01-18 Mosaid Technologies Incorporated Outlet with analog signal adapter, a method for use thereof and a network using said outlet
US7394204B1 (en) 2005-01-13 2008-07-01 Universal Lighting Technologies, Inc. Zero crossing detection of line voltage/current of variable amplitude
US7307512B2 (en) * 2005-04-29 2007-12-11 Current Technologies, Llc Power line coupling device and method of use
AU2006285418A1 (en) * 2005-05-20 2007-03-08 Ambient Corporaton Inductive coupler for power line communications, having a member for maintaining an electrical connection
US7339458B2 (en) * 2005-05-20 2008-03-04 Ambient Corporation Power line communications interface and surge protector
US7414526B2 (en) * 2005-06-28 2008-08-19 International Broadband Communications, Inc. Coupling of communications signals to a power line
US7319717B2 (en) * 2005-06-28 2008-01-15 International Broadband Electric Communications, Inc. Device and method for enabling communications signals using a medium voltage power line
US7778514B2 (en) * 2005-07-15 2010-08-17 International Broadband Electric Communications, Inc. Coupling of communications signals to a power line
US7522812B2 (en) * 2005-07-15 2009-04-21 International Broadband Electric Communications, Inc. Coupling of communications signals to a power line
US7667344B2 (en) * 2005-07-15 2010-02-23 International Broadband Electric Communications, Inc. Coupling communications signals to underground power lines
EP1770870B1 (en) * 2005-10-03 2019-04-03 Avago Technologies International Sales Pte. Limited Powerline communication device and method
US20070076666A1 (en) * 2005-10-03 2007-04-05 Riveiro Juan C Multi-Wideband Communications over Power Lines
US8213895B2 (en) * 2005-10-03 2012-07-03 Broadcom Europe Limited Multi-wideband communications over multiple mediums within a network
US7808985B2 (en) * 2006-11-21 2010-10-05 Gigle Networks Sl Network repeater
US8406239B2 (en) * 2005-10-03 2013-03-26 Broadcom Corporation Multi-wideband communications over multiple mediums
JP4611172B2 (en) * 2005-10-20 2011-01-12 関西電力株式会社 Power line carrier communication equipment
US7519328B2 (en) 2006-01-19 2009-04-14 Murata Manufacturing Co., Ltd. Wireless IC device and component for wireless IC device
EP2005612A4 (en) * 2006-04-04 2009-07-01 Adc Gmbh Power line communications coupler
KR100968347B1 (en) 2006-04-14 2010-07-08 가부시키가이샤 무라타 세이사쿠쇼 Antenna
US9064198B2 (en) 2006-04-26 2015-06-23 Murata Manufacturing Co., Ltd. Electromagnetic-coupling-module-attached article
CN101416350B (en) 2006-04-26 2013-09-04 株式会社村田制作所 Article provided with feed circuit board
DE112007001222B4 (en) 2006-05-26 2017-10-05 Murata Manufacturing Co., Ltd. Data Coupler
WO2007145053A1 (en) 2006-06-12 2007-12-21 Murata Manufacturing Co., Ltd. Electromagnetically coupled module, wireless ic device inspecting system, electromagnetically coupled module using the wireless ic device inspecting system, and wireless ic device manufacturing method
JP4281850B2 (en) 2006-06-30 2009-06-17 株式会社村田製作所 optical disk
US7860146B2 (en) * 2006-07-06 2010-12-28 Gigle Networks, Inc. Adaptative multi-carrier code division multiple access
WO2008007606A1 (en) 2006-07-11 2008-01-17 Murata Manufacturing Co., Ltd. Antenna and radio ic device
US9705562B2 (en) * 2006-07-25 2017-07-11 Broadcom Europe Limited Dual transformer communication interface
US8885814B2 (en) 2006-07-25 2014-11-11 Broadcom Europe Limited Feedback impedance control for driving a signal
DE112007001912T5 (en) 2006-08-24 2009-07-30 Murata Mfg. Co., Ltd., Nagaokakyo-shi High frequency IC device test system and method of making high frequency IC devices using same
JP4775442B2 (en) 2006-09-26 2011-09-21 株式会社村田製作所 Article with electromagnetic coupling module
CN101523750B (en) 2006-10-27 2016-08-31 株式会社村田制作所 The article of charged magnetic coupling module
CN1976253B (en) * 2006-12-12 2010-12-01 京信通信技术(广州)有限公司 Digital microwave relay communication system and realizing method thereof
WO2008090943A1 (en) 2007-01-26 2008-07-31 Murata Manufacturing Co., Ltd. Container with electromagnetically coupling module
WO2008096576A1 (en) 2007-02-06 2008-08-14 Murata Manufacturing Co., Ltd. Packing material provided with electromagnetically coupled module
JP5024372B2 (en) 2007-04-06 2012-09-12 株式会社村田製作所 Wireless IC device
US8009101B2 (en) 2007-04-06 2011-08-30 Murata Manufacturing Co., Ltd. Wireless IC device
WO2008126649A1 (en) 2007-04-09 2008-10-23 Murata Manufacturing Co., Ltd. Wireless ic device
US7762472B2 (en) 2007-07-04 2010-07-27 Murata Manufacturing Co., Ltd Wireless IC device
US8235299B2 (en) 2007-07-04 2012-08-07 Murata Manufacturing Co., Ltd. Wireless IC device and component for wireless IC device
ATE540377T1 (en) 2007-04-26 2012-01-15 Murata Manufacturing Co WIRELESS IC DEVICE
ATE544129T1 (en) 2007-04-27 2012-02-15 Murata Manufacturing Co WIRELESS IC DEVICE
EP2141769A4 (en) 2007-04-27 2010-08-11 Murata Manufacturing Co Wireless ic device
CN101568934A (en) 2007-05-10 2009-10-28 株式会社村田制作所 Wireless IC device
EP2148449B1 (en) 2007-05-11 2012-12-12 Murata Manufacturing Co., Ltd. Wireless ic device
US7714682B2 (en) * 2007-06-21 2010-05-11 Current Technologies, Llc Power line data signal attenuation device and method
US7795994B2 (en) * 2007-06-26 2010-09-14 Current Technologies, Llc Power line coupling device and method
US7876174B2 (en) * 2007-06-26 2011-01-25 Current Technologies, Llc Power line coupling device and method
WO2009001814A1 (en) 2007-06-27 2008-12-31 Murata Manufacturing Co., Ltd. Wireless ic device
WO2009008296A1 (en) 2007-07-09 2009-01-15 Murata Manufacturing Co., Ltd. Wireless ic device
KR101037035B1 (en) 2007-07-17 2011-05-25 가부시키가이샤 무라타 세이사쿠쇼 Wireless ic device and electronic apparatus
JP4434311B2 (en) 2007-07-18 2010-03-17 株式会社村田製作所 Wireless IC device and manufacturing method thereof
US7830311B2 (en) 2007-07-18 2010-11-09 Murata Manufacturing Co., Ltd. Wireless IC device and electronic device
EP2568419B1 (en) 2007-07-18 2015-02-25 Murata Manufacturing Co., Ltd. Apparatus comprising an RFID device
US20090021352A1 (en) 2007-07-18 2009-01-22 Murata Manufacturing Co., Ltd. Radio frequency ic device and electronic apparatus
US20090085726A1 (en) * 2007-09-27 2009-04-02 Radtke William O Power Line Communications Coupling Device and Method
KR100908775B1 (en) * 2007-09-28 2009-07-22 한국전력공사 Power line communication device and method
US8065099B2 (en) * 2007-12-20 2011-11-22 Tollgrade Communications, Inc. Power distribution monitoring system and method
KR101047189B1 (en) 2007-12-20 2011-07-06 가부시키가이샤 무라타 세이사쿠쇼 Wireless IC devices
CN103401063B (en) 2007-12-26 2018-03-02 株式会社村田制作所 Antenna assembly and Wireless IC device
KR100952737B1 (en) * 2007-12-28 2010-04-13 주식회사 피플웍스 Coupler for surge current
JP5267463B2 (en) 2008-03-03 2013-08-21 株式会社村田製作所 Wireless IC device and wireless communication system
WO2009110382A1 (en) 2008-03-03 2009-09-11 株式会社村田製作所 Composite antenna
JP4404166B2 (en) 2008-03-26 2010-01-27 株式会社村田製作所 Wireless IC device
EP2264831B1 (en) 2008-04-14 2020-05-27 Murata Manufacturing Co. Ltd. Radio ic device, electronic device, and method for adjusting resonance frequency of radio ic device
EP2840648B1 (en) 2008-05-21 2016-03-23 Murata Manufacturing Co., Ltd. Wireless IC device
WO2009142068A1 (en) 2008-05-22 2009-11-26 株式会社村田製作所 Wireless ic device and method for manufacturing the same
CN104077622B (en) 2008-05-26 2016-07-06 株式会社村田制作所 The authenticating method of wireless IC device system and Wireless IC device
JP4535210B2 (en) 2008-05-28 2010-09-01 株式会社村田製作所 Wireless IC device component and wireless IC device
JP4557186B2 (en) 2008-06-25 2010-10-06 株式会社村田製作所 Wireless IC device and manufacturing method thereof
JP4671001B2 (en) 2008-07-04 2011-04-13 株式会社村田製作所 Wireless IC device
JP5434920B2 (en) 2008-08-19 2014-03-05 株式会社村田製作所 Wireless IC device and manufacturing method thereof
US7795973B2 (en) 2008-10-13 2010-09-14 Gigle Networks Ltd. Programmable gain amplifier
US7956689B2 (en) * 2008-10-13 2011-06-07 Broadcom Corporation Programmable gain amplifier and transconductance compensation system
JP5429182B2 (en) 2008-10-24 2014-02-26 株式会社村田製作所 Wireless IC device
CN102197537B (en) 2008-10-29 2014-06-18 株式会社村田制作所 Wireless IC device
CN102187518B (en) 2008-11-17 2014-12-10 株式会社村田制作所 Antenna and wireless ic device
CN102273012B (en) 2009-01-09 2013-11-20 株式会社村田制作所 Wireless IC device, wireless IC module and wireless IC module manufacturing method
WO2010087429A1 (en) 2009-01-30 2010-08-05 株式会社村田製作所 Antenna and wireless ic device
DE102009009271A1 (en) * 2009-02-17 2010-06-24 Siemens Aktiengesellschaft Repeater pair i.e. radio-repeater pair, for use in wireless, intermeshed network, has transmission lines transmitting signals received from repeater to another repeater in frequency range
US8155143B2 (en) * 2009-03-03 2012-04-10 Aboundi, Inc. Transmission line adapter and system
JP5278954B2 (en) * 2009-03-24 2013-09-04 シャープ株式会社 Power line communication apparatus and communication method in power line communication apparatus
JP5510450B2 (en) 2009-04-14 2014-06-04 株式会社村田製作所 Wireless IC device
CN102405556B (en) 2009-04-21 2013-04-10 株式会社村田制作所 Antenna apparatus and resonant frequency setting method of same
JP5447515B2 (en) 2009-06-03 2014-03-19 株式会社村田製作所 Wireless IC device and manufacturing method thereof
CN102474009B (en) 2009-07-03 2015-01-07 株式会社村田制作所 Antenna and antenna module
WO2011037234A1 (en) 2009-09-28 2011-03-31 株式会社村田製作所 Wireless ic device and method for detecting environmental conditions using same
JP5201270B2 (en) 2009-09-30 2013-06-05 株式会社村田製作所 Circuit board and manufacturing method thereof
JP5304580B2 (en) 2009-10-02 2013-10-02 株式会社村田製作所 Wireless IC device
CN102576939B (en) 2009-10-16 2015-11-25 株式会社村田制作所 Antenna and wireless ic device
WO2011052310A1 (en) 2009-10-27 2011-05-05 株式会社村田製作所 Transmitting/receiving apparatus and wireless tag reader
WO2011055703A1 (en) 2009-11-04 2011-05-12 株式会社村田製作所 Communication terminal and information processing system
CN108063314A (en) 2009-11-04 2018-05-22 株式会社村田制作所 Communication terminal and information processing system
CN102473244B (en) 2009-11-04 2014-10-08 株式会社村田制作所 Wireless IC tag, reader/writer, and information processing system
WO2011062238A1 (en) 2009-11-20 2011-05-26 株式会社村田製作所 Antenna device and mobile communication terminal
CN101741337B (en) * 2009-11-24 2012-10-31 北京北方微电子基地设备工艺研究中心有限责任公司 Impedance adjusting device and impedance matching system comprising same
CN102687338B (en) 2009-12-24 2015-05-27 株式会社村田制作所 Antenna and mobile terminal
CN102792520B (en) 2010-03-03 2017-08-25 株式会社村田制作所 Wireless communication module and Wireless Telecom Equipment
JP5403146B2 (en) 2010-03-03 2014-01-29 株式会社村田製作所 Wireless communication device and wireless communication terminal
CN102576940B (en) 2010-03-12 2016-05-04 株式会社村田制作所 Wireless communication devices and metal article processed
GB2491447B (en) 2010-03-24 2014-10-22 Murata Manufacturing Co RFID system
JP5630499B2 (en) 2010-03-31 2014-11-26 株式会社村田製作所 Antenna apparatus and wireless communication device
JP5299351B2 (en) 2010-05-14 2013-09-25 株式会社村田製作所 Wireless IC device
JP5170156B2 (en) 2010-05-14 2013-03-27 株式会社村田製作所 Wireless IC device
EP2390891A1 (en) * 2010-05-24 2011-11-30 ABB Technology AG A very fast transient suppressing device
JP5376060B2 (en) 2010-07-08 2013-12-25 株式会社村田製作所 Antenna and RFID device
GB2537773A (en) 2010-07-28 2016-10-26 Murata Manufacturing Co Antenna apparatus and communication terminal instrument
JP5423897B2 (en) 2010-08-10 2014-02-19 株式会社村田製作所 Printed wiring board and wireless communication system
EP2424120A1 (en) 2010-08-31 2012-02-29 ABB Research Ltd. Power line communication filter arrangement
JP5234071B2 (en) 2010-09-03 2013-07-10 株式会社村田製作所 RFIC module
JP5630506B2 (en) 2010-09-30 2014-11-26 株式会社村田製作所 Wireless IC device
CN105226382B (en) 2010-10-12 2019-06-11 株式会社村田制作所 Antenna assembly and terminal installation
GB2501385B (en) 2010-10-21 2015-05-27 Murata Manufacturing Co Communication terminal device
JP5510560B2 (en) 2011-01-05 2014-06-04 株式会社村田製作所 Wireless communication device
WO2012096365A1 (en) 2011-01-14 2012-07-19 株式会社村田製作所 Rfid chip package and rfid tag
WO2012117843A1 (en) 2011-02-28 2012-09-07 株式会社村田製作所 Wireless communication device
WO2012121185A1 (en) 2011-03-08 2012-09-13 株式会社村田製作所 Antenna device and communication terminal apparatus
KR101317226B1 (en) 2011-04-05 2013-10-15 가부시키가이샤 무라타 세이사쿠쇼 Wireless communication device
JP5482964B2 (en) 2011-04-13 2014-05-07 株式会社村田製作所 Wireless IC device and wireless communication terminal
WO2012157596A1 (en) 2011-05-16 2012-11-22 株式会社村田製作所 Wireless ic device
WO2013008874A1 (en) 2011-07-14 2013-01-17 株式会社村田製作所 Wireless communication device
CN103370886B (en) 2011-07-15 2015-05-20 株式会社村田制作所 Wireless communication device
CN203850432U (en) 2011-07-19 2014-09-24 株式会社村田制作所 Antenna apparatus and communication terminal apparatus
WO2013035821A1 (en) 2011-09-09 2013-03-14 株式会社村田製作所 Antenna device and wireless device
JP5344108B1 (en) 2011-12-01 2013-11-20 株式会社村田製作所 Wireless IC device and manufacturing method thereof
JP5354137B1 (en) 2012-01-30 2013-11-27 株式会社村田製作所 Wireless IC device
WO2013125610A1 (en) 2012-02-24 2013-08-29 株式会社村田製作所 Antenna device and wireless communication device
JP2013197715A (en) * 2012-03-16 2013-09-30 Sumitomo Electric Ind Ltd Communication device and communication system
CN104487985B (en) 2012-04-13 2020-06-26 株式会社村田制作所 Method and device for inspecting RFID tag
KR101622185B1 (en) 2012-05-30 2016-05-18 엘에스산전 주식회사 Design of a power line coupler and a power line coupler designed thereof
RU2616591C2 (en) * 2013-01-23 2017-04-18 Бертель С.П.А. Line filter for transmission systems on ac transmission lines of average/high voltage
JP5596202B1 (en) * 2013-04-04 2014-09-24 日本ビソー株式会社 Gondola device and communication method
CN104242991B (en) * 2014-08-29 2016-07-06 戴葵 A kind of ultra wide band electrically powerline carrier communication block device structure
US9685993B2 (en) * 2015-04-02 2017-06-20 AMTB Technology Power line communication control system
CN107871601B (en) * 2016-09-27 2020-10-27 西门子公司 Current transformer and direct current source based on same
CN108878118B (en) 2017-05-08 2021-06-11 台达电子工业股份有限公司 Transformer device
CN108878105B (en) * 2017-05-08 2021-07-30 台达电子工业股份有限公司 Transformer device
CN109120307B (en) * 2018-08-07 2021-06-22 南京邮电大学 Power line carrier communication system and band-pass matching coupler thereof
RU2705421C1 (en) * 2018-12-25 2019-11-07 Общество с ограниченной ответственностью "ТЕКОН Микропроцессорные технологии" Method of transmitting data over a bus, a communication system for realizing said method and an automatic protection device for preventing an emergency situation at a control object
EP4027528A1 (en) * 2021-01-08 2022-07-13 NXP USA, Inc. Communications system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369416A (en) * 1979-12-22 1983-01-18 Brown, Boveri & Cie Ag Band-stop filter for equipment with carrier-frequency utilization of low-voltage lines

Family Cites Families (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR759125A (en) * 1932-08-03 1934-01-29 Siemens Ag Coupling arrangement for high frequency service on high voltage lines
US6452482B1 (en) * 1999-12-30 2002-09-17 Ambient Corporation Inductive coupling of a data signal to a power transmission cable
US3924223A (en) 1974-02-21 1975-12-02 Westinghouse Electric Corp Power line communication system having a protective terminating impedance arrangement
DE2417023C3 (en) * 1974-04-08 1981-06-11 Messwandler-Bau Gmbh, 8600 Bamberg Single-conductor current transformer that can be installed in a fully insulated, metal-enclosed high-voltage switchgear
US3973087A (en) * 1974-12-05 1976-08-03 General Electric Company Signal repeater for power line access data system
US4030058A (en) * 1976-03-30 1977-06-14 Westinghouse Electric Corporation Inductive coupler
US4007434A (en) * 1976-04-14 1977-02-08 Nasa Notch filter
US4142178A (en) * 1977-04-25 1979-02-27 Westinghouse Electric Corp. High voltage signal coupler for a distribution network power line carrier communication system
US4184056A (en) * 1978-10-05 1980-01-15 Gte Laboratories Incorporated Fault locating system for optical telecommunications
US4327349A (en) 1980-03-19 1982-04-27 General Electric Company Transformer core having charge dissipation facility
DE3166324D1 (en) * 1981-04-28 1984-10-31 Sprecher & Schuh Ag Current transformer with annular case to be built in a metal cast high-tension switchgear installation
US4434396A (en) * 1981-11-02 1984-02-28 Montague Herbert R Power line transient suppression circuit
US4777652A (en) * 1982-07-27 1988-10-11 A.R.F. Products Radio communication systems for underground mines
US4471133A (en) * 1983-05-31 1984-09-11 General Electric Company Continuous method for making methyldimethoxysilane
JPS6069919A (en) * 1983-09-26 1985-04-20 Matsushita Electric Ind Co Ltd Block filter of power line carrier controller
US4675579A (en) * 1985-03-18 1987-06-23 General Electric Company Coupling of carrier signal from power line
US4697166A (en) * 1986-08-11 1987-09-29 Nippon Colin Co., Ltd. Method and apparatus for coupling transceiver to power line carrier system
GB8628004D0 (en) * 1986-11-22 1986-12-31 Emlux Ltd Filtering electrical signals
US4760484A (en) 1986-12-18 1988-07-26 Honeywell, Inc. Protective inductive devices with increased ability to absord volt-seconds in an electrical conductor
US5717685A (en) * 1989-04-28 1998-02-10 Abraham; Charles Transformer coupler for communication over various lines
GB9222205D0 (en) * 1992-10-22 1992-12-02 Norweb Plc Low voltage filter
DE9315875U1 (en) 1993-10-18 1993-12-16 Siemens Ag Device for coupling or receiving electrical signals into or from an energy transmission cable
GB9324152D0 (en) * 1993-11-24 1994-01-12 Remote Metering Systems Ltd Mains communication system
GB9417359D0 (en) * 1994-08-26 1994-10-19 Norweb Plc A power transmission network and filter therefor
US5668658A (en) * 1995-02-28 1997-09-16 Nec Corporation Transfer of repeater information signals in in-line optical amplifier repeater system
PL330216A1 (en) * 1996-05-29 1999-05-10 Asea Brown Boveri Direct current transformer/reactor
US6032020A (en) * 1997-07-28 2000-02-29 Motorola, Inc. Multi-repeater communication system
US6041065A (en) * 1997-08-13 2000-03-21 Hewlett-Packard Company Flexible multi-frequency repeater
US6191589B1 (en) 1999-03-29 2001-02-20 George A. Spencer Test circuit for an AFCI/GFCI circuit breaker
US6996200B2 (en) * 1999-12-23 2006-02-07 Analog Devices, Inc. Device for use in controlling a sample rate
US6690916B1 (en) * 2000-10-10 2004-02-10 Motorola, Inc. Radio network for radio communication in an enclosed environment and a repeater for such a radio network
US7007305B2 (en) * 2001-09-06 2006-02-28 Genlyte Thomas Group Llc Repeater amplifier with signal firewall protection for power line carrier communication networks
MXPA04010789A (en) * 2002-05-03 2005-03-07 Ambient Corp Construction of medium voltage power line data couplers.
US6993317B2 (en) * 2002-10-02 2006-01-31 Amperion, Inc. Method and system for signal repeating in powerline communications
CA2502107A1 (en) * 2002-10-17 2004-04-29 Ambient Corporation Repeaters sharing a common medium for communications
US7230935B2 (en) * 2002-10-24 2007-06-12 Widefi, Inc. Physical layer repeater with selective use of higher layer functions based on network operating conditions
US6985715B2 (en) * 2003-05-29 2006-01-10 Amperion, Inc. Method and device for frequency translation in powerline communications
US20060205341A1 (en) * 2005-03-11 2006-09-14 Ems Technologies, Inc. Dual polarization wireless repeater including antenna elements with balanced and quasi-balanced feeds
US7078996B1 (en) * 2005-05-20 2006-07-18 Ambient Corporation Inductive coupler for power line communications

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369416A (en) * 1979-12-22 1983-01-18 Brown, Boveri & Cie Ag Band-stop filter for equipment with carrier-frequency utilization of low-voltage lines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1556947A2 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006012681A1 (en) * 2004-08-02 2006-02-09 Donald Malcolm Ross Yelland Method and device for power line head-end data transmission

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US7109835B2 (en) 2006-09-19
EA006985B1 (en) 2006-06-30

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