EP2009735A1 - Antenne a diversité de polarisation pour la transmission et/ou la reception de signaux audio et/ou video - Google Patents

Antenne a diversité de polarisation pour la transmission et/ou la reception de signaux audio et/ou video Download PDF

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Publication number
EP2009735A1
EP2009735A1 EP07447039A EP07447039A EP2009735A1 EP 2009735 A1 EP2009735 A1 EP 2009735A1 EP 07447039 A EP07447039 A EP 07447039A EP 07447039 A EP07447039 A EP 07447039A EP 2009735 A1 EP2009735 A1 EP 2009735A1
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EP
European Patent Office
Prior art keywords
antenna
antenna according
radiating
radiating element
elements
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP07447039A
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German (de)
English (en)
French (fr)
Inventor
Philippe Herman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP07447039A priority Critical patent/EP2009735A1/fr
Publication of EP2009735A1 publication Critical patent/EP2009735A1/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength

Definitions

  • the present invention relates, in general, to a polarization diversity antenna for transmitting and / or receiving audio and / or video signals.
  • the invention relates to a polarization diversity antenna for transmitting and / or receiving audio and / or video signals, of the kind comprising a plurality of identical antenna elements powered electrically by currents of substantially the same phase and the same amplitude, each antenna element comprising a radiating element formed of two polygonal geometric figures joined by a common vertex, a feed center and a reflector associated with this radiating element.
  • Microstrip patch antennas used in particular in wireless computer networks have certain advantages such as low weight, small footprint and low cost of use. They are available in either horizontal or vertical linear polarization or left or right circular polarization for telecommunications. However, these antennas also have limited possibilities. As examples, the narrow bandwidth is often associated with problems of geometric and physical tolerance and generally low gain (6 d Bi).
  • the object of the present invention is to propose an antenna of the type indicated above, of a non-prohibitive cost, which has a flexible use because it allows a diversity of polarization and whose performances are superior to those of antennas of the state of the technique, in particular antennas of the patch type, used in comparable applications.
  • the antenna according to the invention is characterized in that it comprises two identical and separate radiating elements whose respective longitudinal axes of symmetry intersect orthogonally at said feed centers which are isolated one of each other and fed individually.
  • each antenna element comprises a radiating element or radiator configured according to a double continuous loop of perimeter substantially equal to two wavelengths (2 ⁇ ), these two loops being located in the same plane , having a common vertex and being selected from a set of polygonal geometrical shapes comprising quadrilaterals undistorted or deformed into a series of polygons whose vertices grow in number toward each other until they form a geometrical figure devoid of such highs.
  • the two loops are chosen from a set of polygonal geometrical shapes resulting from the deformation of a quadrilateral, these polygonal shapes being capable of to ensure a greater range of the bandwidth and to increase the gain compared to the undeformed quadrilateral.
  • the antenna element may represent a continuous double loop taking the form of, for example, two squares or, preferably, two pentagons, hexagons or other higher polygons until reaching and understanding geometric shapes without sharp angles. for example two ellipses.
  • each radiating element is configured according to a double continuous loop representing two identical polygonal geometric shapes.
  • the two radiating elements are of identical shape and each configured in a double continuous loop representing two identical polygonal geometric shapes.
  • each antenna element comprises a radiating element configured according to a double continuous loop taking the geometric form of two pentagons.
  • the radiating element takes the form, therefore, of a decagonal loop.
  • the two radiating elements are each configured in an identical decagonal loop.
  • the radiating element is in the form of two pentagons
  • the three adjacent sides of each of them, with respect to the furthest sides of the feeding center, are advantageously located each along the sides of a single and even rectangle. Consequently, the two pentagons of the same radiating element each comprise two adjacent right angles.
  • the two pentagons in question correspond to two adjacent parallel quadrilaterals whose sides closest to each other are deformed towards each other so as to constitute the outline of a feeding center. .
  • the radiating element taking the form of a double pentagon or double quadrilateral deformed thus described may be designated later in the description as in the claims by the name "biquad".
  • the radiating element is usually made from a wire advantageously copper, placed at a short distance from the receiver to which it is attached.
  • this metal wire may be replaced preferably by a printed circuit on a dielectric support panel, printing performed according to known methods.
  • the two printed circuits, each forming a radiating element are respectively fixed on the opposite faces of the same support panel, for example a laminated panel formed of a glass fiber reinforced epoxy composite.
  • a panel is generally thin usually less than 2 mm.
  • This usually takes the form of a plate configured in support of said radiating elements which are directly attached thereto or, preferably, via a dielectric panel supporting them, in particular in the form of printed circuits.
  • This reflector consists of a metal plate generally made of copper or aluminum. Steel, especially stainless steel or polychlorinated biphenyl (“PCB”) can be used as well. In this case, and in known manner, it may be advantageous to solder, for example copper to the coaxial power cable orifice, orifice formed in this reflector so as to ensure a good physical and electrical connection.
  • PCB polychlorinated biphenyl
  • the different radiating elements are connected, via their respective supply center, to a divider / phase shifter circuit, in particular such a circuit capable of providing a phase shift of, for example, 90 °.
  • This connection is generally provided by means of a coaxial power supply cable.
  • the antenna according to the invention comprises a set of two radiating elements of biquad type, namely a radiating element 1 placed horizontally and an identical radiating element 2 placed vertically.
  • These two radiating elements are each configured in closed loop forming, in this case, two pentagons equal in the same plane and united by a common vertex.
  • these biquads 1 and 2 intersect perfectly at 90 ° avoiding any interaction between them.
  • the farthest sides of the feed center 4 of the radiating element 1 that is to say the three sides adjacent a, b, c of the first pentagon and the three adjacent sides d, e, f of the second pentagon, are located along the edges of the same rectangle. Therefore, the sides a and b; b and c; d and e and e and f are orthogonal.
  • the length of the sides b and e is about 55 mm
  • the length of the sides a, c, d, and f is about 50 mm and the total length of this biquad 1 is about 120 mm. Since biquads 1 and 2 are equal, the characteristics listed above for biquad 1 are found at biquad 2.
  • these biquads 1 and 2 are in the form of printed circuits respectively on the opposite faces of a panel 3 of thickness 1.6 mm, made of woven and glued glass fibers, for example a FR4 board as shown in figure 2 .
  • the figure 1 also shows, in addition to the feeding center 4 of the biquad 1, the feeding center 5 of the biquad 2. These feeding centers, isolated from each other, are spaced about 40 mm from the reflector 6 visible to the figure 2 which consists of an aluminum plate G3 of about 250 mm ⁇ 250 mm and about 1.5 mm thick.
  • each of these biquads is connected via its respective power supply center to a divider / phase-shifter circuit 7 of the type having 4 inputs, which is shown in FIG. figure 2 .
  • This phase-shifting circuit printed on a double-sided FR4 panel, is loaded on 50 ⁇ and has an input 8 in connection with an electric power source (not shown) while the inputs 9 and 10 are connected respectively to the biquad 1 through its feed center 4 and biquad 2 via its center of supply 5.
  • This connection is provided, on the other hand, by means of coaxial cables 11 and 12 with an impedance of 50 ⁇ , power supply cables covered with electrically neutral material.
  • the input 9 connected to the horizontal biquad 1 may be out of phase + 90 ° or the input 10 connected to the biquad 2 may be, in turn, out of phase -90 ° and this, so as to put in phase these two radiating elements 1 and 2 and configure the antenna in circular polarization respectively right or left.
  • the polarization diversity antenna according to the invention provides undeniable advantages over the state of the art represented in particular by the patch antenna and can be developed at a low cost, in any event comparable to that of this type of antenna.
  • the bandwidth and the gain, close to 9 dBi, offered by the antenna according to the invention in circular polarization prove to be greater than with a patch antenna.
  • the opening of the main lobe of the antenna according to the invention is greater than 40 °.
  • the circularly polarized antenna according to the invention could also be used in Wi-Fi in particular at 2.4 GHz for the transmission of images, for example from drones used for terrestrial observation, real time and from the sky.
  • the antenna according to the invention may be used for the polarization decoupling measurement and in particular in specific cases where the antenna polarization switching is frequent.
EP07447039A 2007-06-22 2007-06-22 Antenne a diversité de polarisation pour la transmission et/ou la reception de signaux audio et/ou video Withdrawn EP2009735A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07447039A EP2009735A1 (fr) 2007-06-22 2007-06-22 Antenne a diversité de polarisation pour la transmission et/ou la reception de signaux audio et/ou video

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07447039A EP2009735A1 (fr) 2007-06-22 2007-06-22 Antenne a diversité de polarisation pour la transmission et/ou la reception de signaux audio et/ou video

Publications (1)

Publication Number Publication Date
EP2009735A1 true EP2009735A1 (fr) 2008-12-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07447039A Withdrawn EP2009735A1 (fr) 2007-06-22 2007-06-22 Antenne a diversité de polarisation pour la transmission et/ou la reception de signaux audio et/ou video

Country Status (1)

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EP (1) EP2009735A1 (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2954599A1 (fr) * 2009-12-23 2011-06-24 Thales Sa Antenne avec elements rayonnants incorporant un dephaseur.
WO2012131126A1 (es) * 2011-03-29 2012-10-04 Consejo Superior De Investigaciones Científicas (Csic) Antena margarita para emisión y recepción de ondas electromagnéticas polarizadas lineal y circularmente
WO2014076635A1 (en) * 2012-11-15 2014-05-22 Poynting Antennas (Pty) Limited Broad band cross polarized antenna arrangement
CN107546468A (zh) * 2016-06-23 2018-01-05 鹦鹉无人机股份有限公司 用于无人机的三叶草或斜平面轮类型的WiFi天线
CN113571909A (zh) * 2021-06-30 2021-10-29 上海中航光电子有限公司 天线单元、天线装置以及电子设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1516058A1 (de) * 1966-04-06 1969-07-24 Telefunken Patent Drehkreuzantenne
DE19603803A1 (de) * 1996-02-02 1997-08-14 Niels Koch Quad-Antenne, gefertigt auf einem isolierenden Material
US6469674B1 (en) * 2001-05-17 2002-10-22 James Stanley Podger Double-lemniscate antenna element
JP2005072716A (ja) * 2003-08-20 2005-03-17 Furukawa Electric Co Ltd:The 円偏波アンテナ
JP2007020217A (ja) * 2006-09-22 2007-01-25 Matsushita Electric Ind Co Ltd アンテナ装置
US20070063909A1 (en) * 2004-11-26 2007-03-22 Dx Antenna Company, Limited Antenna

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1516058A1 (de) * 1966-04-06 1969-07-24 Telefunken Patent Drehkreuzantenne
DE19603803A1 (de) * 1996-02-02 1997-08-14 Niels Koch Quad-Antenne, gefertigt auf einem isolierenden Material
US6469674B1 (en) * 2001-05-17 2002-10-22 James Stanley Podger Double-lemniscate antenna element
JP2005072716A (ja) * 2003-08-20 2005-03-17 Furukawa Electric Co Ltd:The 円偏波アンテナ
US20070063909A1 (en) * 2004-11-26 2007-03-22 Dx Antenna Company, Limited Antenna
JP2007020217A (ja) * 2006-09-22 2007-01-25 Matsushita Electric Ind Co Ltd アンテナ装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2954599A1 (fr) * 2009-12-23 2011-06-24 Thales Sa Antenne avec elements rayonnants incorporant un dephaseur.
WO2012131126A1 (es) * 2011-03-29 2012-10-04 Consejo Superior De Investigaciones Científicas (Csic) Antena margarita para emisión y recepción de ondas electromagnéticas polarizadas lineal y circularmente
WO2014076635A1 (en) * 2012-11-15 2014-05-22 Poynting Antennas (Pty) Limited Broad band cross polarized antenna arrangement
CN107546468A (zh) * 2016-06-23 2018-01-05 鹦鹉无人机股份有限公司 用于无人机的三叶草或斜平面轮类型的WiFi天线
CN113571909A (zh) * 2021-06-30 2021-10-29 上海中航光电子有限公司 天线单元、天线装置以及电子设备
CN113571909B (zh) * 2021-06-30 2024-02-09 上海中航光电子有限公司 天线单元、天线装置以及电子设备

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