EP0061965A1 - Antenne mit einem Gerät zur Steuerung der Richtung der linearen Polarisation - Google Patents

Antenne mit einem Gerät zur Steuerung der Richtung der linearen Polarisation Download PDF

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Publication number
EP0061965A1
EP0061965A1 EP82400514A EP82400514A EP0061965A1 EP 0061965 A1 EP0061965 A1 EP 0061965A1 EP 82400514 A EP82400514 A EP 82400514A EP 82400514 A EP82400514 A EP 82400514A EP 0061965 A1 EP0061965 A1 EP 0061965A1
Authority
EP
European Patent Office
Prior art keywords
antenna
guide
primary source
binomial
polarization
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.)
Granted
Application number
EP82400514A
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English (en)
French (fr)
Other versions
EP0061965B1 (de
Inventor
Nhu Bui Hai
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to AT82400514T priority Critical patent/ATE28013T1/de
Publication of EP0061965A1 publication Critical patent/EP0061965A1/de
Application granted granted Critical
Publication of EP0061965B1 publication Critical patent/EP0061965B1/de
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
    • H01Q19/13—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/165—Auxiliary devices for rotating the plane of polarisation
    • 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
    • H01Q21/245—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction provided with means for varying the polarisation 

Definitions

  • the present invention relates to an antenna associated with a receiver or a transmitter, for working in waves with linear polarization and comprising a device for transposing the direction of the linear polarization of the waves received by the receiver or emitted by the transmitter.
  • Adjustment towards the linear polarization received from an antenna by a receiver associated with the antenna is necessary in some cases.
  • the same vertical polarized wave emitted by a satellite is received with a direction of its polarity which makes, with the vertical, an angle which is a function, in particular, of the latitude and the longitude of the place where this wave is picked up.
  • an adjustment is necessary when an antenna changes satellite for the waves it receives. By virtue of the principle of reciprocity this also applies to transmission from, for example, earth stations.
  • the object of the present invention is to provide an antenna equipped with a device for transposing the direction of polarization, which is both simple and inexpensive, usable both for antennas with illumination of the focus and for antennas with Cassegrain optics.
  • an antenna intended to work in waves with linear polarization and comprising a device for transposing the direction of the linear polarization of the waves passing through it is mainly characterized in that the transposing device consists of a twisted guide , connected in series in the primary source of the antenna.
  • FIG. 1 shows, schematically, antennas with illumination by the hearth according to the known art.
  • the antenna according to FIG. 1 comprises a reflector, P l , associated with a primary "V" source, S 1 , itself connected to a receiver, R 1 ; the rotation of the primary source around the main axis PP of the reflector requires mechanical means capable of rotating the horn and the receiver R 1 (or the transmitter in the case of operation in transmission); such an achievement is expensive, cumbersome and therefore practically never implemented.
  • the assembly constituted by the primary source S 2 and the receiver R 2 (or the transmitter in the case of operation in transmission) has its two ends, that is to say its horn and its receiver , combined with the main axis of the reflector, p 2 ; but if the rotation control of the primary source and the receiver is then easier than in the case of an antenna according to FIG. 1, on the other hand the performance of the antenna is lower due to the greater mask created by the source primary due to the presence of the swan neck in the central part of the radiation of the reflector P2.
  • FIG. 3 is a schematic view of an antenna with illumination of the focal point, equipped with a device for transposing the direction of the linear polarization of the waves received by reception means 8 associated with this antenna.
  • the antenna comprises a reflector 7 and a primary source; this primary source is constituted, in series, by a horn 10 followed by a binomial twisted guide 1,2, 3, 4 (step twist in North American literature), followed by a polarization duplexer 5, both of which access V and H are connected to the receiving means 8 by rectangular guides shown diagrammatically in the figure by broken lines.
  • a fixing system 6 makes the primary source integral with the reflector 7.
  • This fixing system comprises four bars, such as the bars 6, 7 which appear in FIG. 3; these bars are welded, at their first end, to the reflector 7.
  • the fixing system 6 also includes a positioning assembly, 60 to 67, onto which the fixing bars are bolted, at their second end.
  • This fixing system comprises two half-collars 60-61, integral with brackets such as 62-63 on which the fixing bars are bolted.
  • the fixing system is shown in section so as to leave a clear view of the primary source of the antenna.
  • FIG. 4 is a partial view of the fastening system 6 of Figure 1; this view is a sectional view through a plane perpendicular to the plane of Figure 3 and passing through the line ZZ of this figure.
  • FIG. 4 shows the two half-collars 60-61 and screw-nut assemblies, such as 66 and 67, which serve to bring the two half-collars closer together to securely hold the polarization duplexer 5 of FIG. 3.
  • brackets 62 to 65 of the fastening system 6 are welded to the half-collar 60 and the other two 63,65 are welded to the half-collar 61.
  • Figure 5 is a view of the binomial twisted guide 1, 2, 3, 4 through the opening of the horn 10 of Figure 3.
  • the first rung (step in North American literature), 1 of this binomial twist guide is integral with the horn 10 of Figure 3 and that its angular position around the main axis 00 (Figure 1) of the binomial twist guide, is adjustable as well as that of the other three steps 2, 3 , 4 of this guide; a fixing assembly, 7, which will appear in FIG. 6 and will be described with the aid of this figure, makes it possible to maintain the rungs in the position which is imparted to them by adjustment.
  • a vector P i indicates the direction of the vertical polarization of a wave with two orthogonal polarizations, received by the antenna 10 (FIG. 1) while a vector P indicates the direction that this polarization must have when the wave arrives in the polarization duplexer 5 (FIG. 3) so that the reception means 8 (FIG. 3) receive this wave with the maximum of energy; these two vectors form an angle Y between them.
  • the binomial twisted guide is a guide with a square section; this square section allows the simultaneous transposition of the directions of the two field vectors of the wave with orthogonal polarization received.
  • angle Y has been taken equal to 90 °, it being understood that Y can take all the values comprised between 0 and 90 °.
  • the operating principle of the adjustable binomial twist guide is known. It is a junction, made of a series of waveguide sections, which is used to modify the angle of the electric field leaving this component with respect to the angle of the electric field entering this component; this modification is made in steps of a length L given by the distance, L (FIG. 3), between two transitions of this twisted guide, and this length L is chosen equal to where ⁇ is the guided wavelength of the average frequency of use of the twisted guide, that is 11.7 GHz in the example described, and where K is the number of steps, that is 4 in the present case.
  • This junction formed by the twisted guide introduces a reflection coefficient which is a function of the number K of the steps, the angle given to each step (X.), the working frequency and the cut-off frequency of the guide.
  • FIG. 6 is a partial view of the antenna according to FIG. 3 at the level of the binomial twisted guide; in this figure appears an assembly 7 which has not been shown in figure 3 for the sake of clarity.
  • This assembly comprises a crown 70, four stops, three of which 75, 76, 77 appear in FIG. 6, four screw-nut assemblies of which three, 71, 72 or 73 appear in FIG. 6 and a flange 50 integral with the guide waves which constitute the access of the polarization duplexer 5.
  • the screw-nut assemblies such as 71, connect the crown 70 to the flange 50; without the screw-nut assemblies the crown 70 can rotate freely around the rung 1 of the guide in binomial twist, but cannot be removed because it is blocked on one side by the base of the horn 10 and on the other by the stops such as 75 which are screwed into the outer wall of rung 1.
  • the four sets of screw-nuts are first loosened, then the adjustment is carried out with using graduations and marks not shown in the figure, then the screw-nut assemblies are tightened.
  • the invention is not limited to the example described using FIGS. 3 to 6; thus, for example, the control of the angular position of the rungs can be carried out using motors.
  • the polarization duplexer 5 of FIG. 3 does not have to be and the section of the rungs of the guide in binomial twist will no longer be square but rectangular.
  • the binomial twist guide may have a number of steps other than four, for example 2, 3, 5, 6, etc.
  • this binomial twist guide may be replaced by a progressive twist guide (twist in Anglo-Saxon literature), but in the latter case the progressive twist guide must be changed for each modification of the transposition angle adjustment, which will require a set of progressive twist guides to be provided in this case.
  • the invention is not limited to the use of the device in an antenna operating in reception since, due to the principle of the reversibility of electromagnetic waves, the device can also function well in transmission.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)
EP82400514A 1981-03-31 1982-03-22 Antenne mit einem Gerät zur Steuerung der Richtung der linearen Polarisation Expired EP0061965B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82400514T ATE28013T1 (de) 1981-03-31 1982-03-22 Antenne mit einem geraet zur steuerung der richtung der linearen polarisation.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8106431A FR2503462A1 (fr) 1981-03-31 1981-03-31 Antenne a dispositif de transposition de la direction de la polarisation lineaire
FR8106431 1981-03-31

Publications (2)

Publication Number Publication Date
EP0061965A1 true EP0061965A1 (de) 1982-10-06
EP0061965B1 EP0061965B1 (de) 1987-06-24

Family

ID=9256820

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400514A Expired EP0061965B1 (de) 1981-03-31 1982-03-22 Antenne mit einem Gerät zur Steuerung der Richtung der linearen Polarisation

Country Status (6)

Country Link
US (1) US4546359A (de)
EP (1) EP0061965B1 (de)
JP (1) JPS57176805A (de)
AT (1) ATE28013T1 (de)
DE (1) DE3276648D1 (de)
FR (1) FR2503462A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3740651A1 (de) * 1987-12-01 1989-06-22 Messerschmitt Boelkow Blohm Vorrichtung zur einstellung der polarisationsebene
US5061037A (en) * 1990-10-22 1991-10-29 Hughes Aircraft Company Dual septum polarization rotator
US6297710B1 (en) 1999-09-02 2001-10-02 Channel Master Llc Slip joint polarizer
RU2225059C2 (ru) * 2002-05-13 2004-02-27 Сургутский государственный университет ХМАО Радиолокационный отражатель
JP4164807B2 (ja) * 2003-08-20 2008-10-15 太洋無線株式会社 スロットアレーアンテナ
DE112004000077B4 (de) * 2003-10-06 2012-01-19 Murata Manufacturing Co., Ltd. Verdrillter Wellenleiter und drahtlose Vorrichtung
DE102007061571A1 (de) * 2007-12-18 2009-07-16 Endress + Hauser Gmbh + Co. Kg Füllstandsmessgerät

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1024590B (de) * 1957-07-24 1958-02-20 Telefunken Gmbh Hohlleiterabschnitt mit einstellbarer Querschnitts-Verdrehung um die Laengsachse
US2996714A (en) * 1957-12-26 1961-08-15 Edward F Harris Dish radiator of adjustable polarization
DE1117669B (de) * 1960-06-20 1961-11-23 Siemens Ag Rotationsparabol-Antenne
US3076188A (en) * 1958-06-04 1963-01-29 Decca Ltd Adjustable polarization waveguide for radar
GB938004A (en) * 1960-11-17 1963-09-25 Marconi Wireless Telegraph Co Improvements in or relating to waveguide transformers
US3541560A (en) * 1968-06-24 1970-11-17 Itt Enhancement of polarization isolation in a dual polarized antenna
FR2203457A5 (de) * 1972-09-13 1974-05-10 Elettronica Aster Srl
FR2414255A1 (fr) * 1978-01-04 1979-08-03 Licentia Gmbh Dispositif de compensation pour deux guides d'ondes presentant un decalage angulaire

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB820324A (en) * 1956-06-05 1959-09-16 British Thomson Houston Co Ltd Improvements in and relating to waveguides
JPS5434738A (en) * 1977-08-24 1979-03-14 Yagi Antenna Device for switching antenna polarization plane
JPS5947881B2 (ja) * 1977-12-12 1984-11-22 日本電信電話株式会社 可変電力分配器
US4375052A (en) * 1980-07-11 1983-02-22 Microdyne Corporation Polarization rotatable antenna feed

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1024590B (de) * 1957-07-24 1958-02-20 Telefunken Gmbh Hohlleiterabschnitt mit einstellbarer Querschnitts-Verdrehung um die Laengsachse
US2996714A (en) * 1957-12-26 1961-08-15 Edward F Harris Dish radiator of adjustable polarization
US3076188A (en) * 1958-06-04 1963-01-29 Decca Ltd Adjustable polarization waveguide for radar
DE1117669B (de) * 1960-06-20 1961-11-23 Siemens Ag Rotationsparabol-Antenne
GB938004A (en) * 1960-11-17 1963-09-25 Marconi Wireless Telegraph Co Improvements in or relating to waveguide transformers
US3541560A (en) * 1968-06-24 1970-11-17 Itt Enhancement of polarization isolation in a dual polarized antenna
FR2203457A5 (de) * 1972-09-13 1974-05-10 Elettronica Aster Srl
FR2414255A1 (fr) * 1978-01-04 1979-08-03 Licentia Gmbh Dispositif de compensation pour deux guides d'ondes presentant un decalage angulaire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, 11-13 juin 1973, NEW YORK (US) E. STEIN et al.: "Implementation of fixed multiple beam spherical antenna systems and measured test results", pages 17.16-17.21 *

Also Published As

Publication number Publication date
DE3276648D1 (en) 1987-07-30
FR2503462B1 (de) 1985-05-03
US4546359A (en) 1985-10-08
EP0061965B1 (de) 1987-06-24
ATE28013T1 (de) 1987-07-15
FR2503462A1 (fr) 1982-10-08
JPS57176805A (en) 1982-10-30

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