WO1997018598A3 - Electromagnetic filter - Google Patents

Electromagnetic filter Download PDF

Info

Publication number
WO1997018598A3
WO1997018598A3 PCT/US1996/018433 US9618433W WO9718598A3 WO 1997018598 A3 WO1997018598 A3 WO 1997018598A3 US 9618433 W US9618433 W US 9618433W WO 9718598 A3 WO9718598 A3 WO 9718598A3
Authority
WO
WIPO (PCT)
Prior art keywords
cover
resonators
cavities
transmission line
attached
Prior art date
Application number
PCT/US1996/018433
Other languages
French (fr)
Other versions
WO1997018598A2 (en
Inventor
Mostafa A Beik
H Clark Bell
Amr Abdelmonem
Donald E Richied
William Swick Jr
Original Assignee
Illinois Superconductor Corp
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 Illinois Superconductor Corp filed Critical Illinois Superconductor Corp
Priority to AU11201/97A priority Critical patent/AU1120197A/en
Publication of WO1997018598A2 publication Critical patent/WO1997018598A2/en
Publication of WO1997018598A3 publication Critical patent/WO1997018598A3/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/205—Comb or interdigital filters; Cascaded coaxial cavities
    • H01P1/2053—Comb or interdigital filters; Cascaded coaxial cavities the coaxial cavity resonators being disposed parall to each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/70—High TC, above 30 k, superconducting device, article, or structured stock
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/866—Wave transmission line, network, waveguide, or microwave storage device

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

An electromagnetic filter has a unitary filter body defining a number of cavities. A cover for the filter body has several resonators attached to it which are located in the cavities when the cover is attached to the filter body. The cover has a recess into which a transmission line is placed. Passageways through the cover connect the transmission line with coupling mechanisms mounted on the cover adjacent the resonators. The resonators have a generally toroidal shape and the coupling mechanisms are shaped to provide the desired coupling between the transmission line and the resonators. An adjustable capacitor attached to the coupling loop has a passagewey through its housing to eliminate moisture from the capacitor. The resonator and cavities may be tuned by use of a tuning mechanism which is also designed to minimize moisture which might prevent movement of the tuner during tuning.
PCT/US1996/018433 1995-11-13 1996-11-12 Electromagnetic filter WO1997018598A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU11201/97A AU1120197A (en) 1995-11-13 1996-11-12 Electromagnetic filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/556,371 US5843871A (en) 1995-11-13 1995-11-13 Electromagnetic filter having a transmission line disposed in a cover of the filter housing
US08/556,371 1995-11-13

Publications (2)

Publication Number Publication Date
WO1997018598A2 WO1997018598A2 (en) 1997-05-22
WO1997018598A3 true WO1997018598A3 (en) 1997-08-14

Family

ID=24221077

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/018433 WO1997018598A2 (en) 1995-11-13 1996-11-12 Electromagnetic filter

Country Status (3)

Country Link
US (1) US5843871A (en)
AU (1) AU1120197A (en)
WO (1) WO1997018598A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI113578B (en) * 1999-03-03 2004-05-14 Filtronic Lk Oy resonator filter
SE517746C2 (en) * 2000-10-20 2002-07-09 Ericsson Telefon Ab L M Bearing device, Cavity filter and method of mounting thereof
FI125953B (en) * 2011-10-18 2016-04-29 Tongyo Technology Oy Method of manufacturing an RF filter and an RF filter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525953A (en) * 1967-11-07 1970-08-25 Atomic Energy Commission Plasma tuning means wherein the resonant frequency of a cavity resonator tracks the frequency of an ionizing control frequency
US3876963A (en) * 1973-12-03 1975-04-08 Gerald Graham Frequency filter apparatus and method
US4933652A (en) * 1989-04-10 1990-06-12 Celwave Systems Inc. Tem coaxial resonator

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2538614C3 (en) * 1974-09-06 1979-08-02 Murata Manufacturing Co., Ltd., Nagaokakyo, Kyoto (Japan) Dielectric resonator
US4184123A (en) * 1977-09-19 1980-01-15 Rca Corporation Double-tuned output circuit for high power devices using coaxial cavity resonators
US4206428A (en) * 1978-10-20 1980-06-03 Tx Rx Systems Inc. Series notch filter and multicoupler utilizing same
US4241322A (en) * 1979-09-24 1980-12-23 Bell Telephone Laboratories, Incorporated Compact microwave filter with dielectric resonator
JPS57150203A (en) * 1981-03-11 1982-09-17 Fujitsu Ltd Dielectric resonator
US4446429A (en) * 1981-10-09 1984-05-01 Medical College Of Wisconsin Microwave resonator
DE3300766A1 (en) * 1983-01-12 1984-07-12 Bruker Analytische Meßtechnik GmbH, 7512 Rheinstetten COUPLING ARRANGEMENT FOR A CAVITY RESONATOR
US4725779A (en) * 1985-05-08 1988-02-16 Mcw Research Foundation, Inc. NMR local coil with improved decoupling
JPH01309501A (en) * 1988-06-08 1989-12-13 Matsushita Electric Ind Co Ltd Microwave integrated circuit device
US4896125A (en) * 1988-12-14 1990-01-23 Alcatel N.A., Inc. Dielectric notch resonator
US5191304A (en) * 1990-03-02 1993-03-02 Orion Industries, Inc. Bandstop filter having symmetrically altered or compensated quarter wavelength transmission line sections
US5051714A (en) * 1990-03-08 1991-09-24 Alcatel Na, Inc. Modular resonant cavity, modular dielectric notch resonator and modular dielectric notch filter
US5340797A (en) * 1993-01-29 1994-08-23 Illinois Superconductor Corporation Superconducting 123YBaCu-oxide produced at low temperatures
US5714919A (en) * 1993-10-12 1998-02-03 Matsushita Electric Industrial Co., Ltd. Dielectric notch resonator and filter having preadjusted degree of coupling
US5373270A (en) * 1993-12-06 1994-12-13 Radio Frequency Systems, Inc. Multi-cavity dielectric filter
US5608363A (en) * 1994-04-01 1997-03-04 Com Dev Ltd. Folded single mode dielectric resonator filter with cross couplings between non-sequential adjacent resonators and cross diagonal couplings between non-sequential contiguous resonators
US5616540A (en) * 1994-12-02 1997-04-01 Illinois Superconductor Corporation Electromagnetic resonant filter comprising cylindrically curved split ring resonators

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525953A (en) * 1967-11-07 1970-08-25 Atomic Energy Commission Plasma tuning means wherein the resonant frequency of a cavity resonator tracks the frequency of an ionizing control frequency
US3876963A (en) * 1973-12-03 1975-04-08 Gerald Graham Frequency filter apparatus and method
US4933652A (en) * 1989-04-10 1990-06-12 Celwave Systems Inc. Tem coaxial resonator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
M.D. BRILL ET AL.: "Antenna filters for a military radio system", BELL LABORATORIES RECORD, vol. 36, no. 4, April 1958 (1958-04-01), MURRAY HILL, NEW JERSEY US, pages 142 - 145, XP002027628 *

Also Published As

Publication number Publication date
WO1997018598A2 (en) 1997-05-22
AU1120197A (en) 1997-06-05
US5843871A (en) 1998-12-01

Similar Documents

Publication Publication Date Title
US4977614A (en) Wristband with loop antenna
ZA944760B (en) Tunable resonator for microwave oscillators and filters
CA2077500A1 (en) Radio transceiver
WO2000038475A3 (en) A communication device
IL86055A0 (en) Arrangement for filtering a received fm signal
EP0661770A3 (en) TM dual mode dielectric resonator and filter.
CA2246720A1 (en) Dielectric resonator loaded cavity filter coupling mechanisms
IL100604A0 (en) Radio frequency volume resonator for nuclear magnetic resonance
EP1321997A3 (en) Adjustable capacitive coupling structure
US20010030587A1 (en) Receive/transmit multiple cavity filter having single input/output cavity
CA2182050A1 (en) Surface Acoustic Wave Device
MY112053A (en) Feedome, primary radiator, and antenna for microwave
ES293270U (en) Pluricavities microwave filters.
WO1997018598A3 (en) Electromagnetic filter
DE3264801D1 (en) An electronic circuit, such as an electronically tunable oscillator circuit, including an lc resonant circuit
CA2178727A1 (en) Microwave filter
CA2037516C (en) Modular resonant cavity, modular dielectric notch resonator and modular dielectric notch filter
AU5174896A (en) Dual frequency antenna with integral diplexer
WO1999066585A3 (en) Device for tuning of a dielectric resonator
EP0738020A4 (en) Dual tm-mode dielectric resonator apparatus equipped with window for electromagnetic field coupling, and band-pass filter apparatus equipped with the dielectric resonator apparatus
EP0957527A3 (en) A microwave diplexer arrangement
GB2233832B (en) A high-frequency coaxial resonator
WO2004051787A3 (en) Tunable coupling
GB8918636D0 (en) Microwave resonators and microwave filters incorporating microwave resonators
KR920002771Y1 (en) Internal type coil antenna of cordlessphone main body

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AL AM AT AU AZ BB BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU IL IS JP KE KG KP KR KZ LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
AK Designated states

Kind code of ref document: A3

Designated state(s): AL AM AT AU AZ BB BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU IL IS JP KE KG KP KR KZ LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 97519131

Format of ref document f/p: F

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA