EP0905813A2 - Polarisationsweiche zur Ausleuchtung einer Antenne - Google Patents
Polarisationsweiche zur Ausleuchtung einer Antenne Download PDFInfo
- Publication number
- EP0905813A2 EP0905813A2 EP98402074A EP98402074A EP0905813A2 EP 0905813 A2 EP0905813 A2 EP 0905813A2 EP 98402074 A EP98402074 A EP 98402074A EP 98402074 A EP98402074 A EP 98402074A EP 0905813 A2 EP0905813 A2 EP 0905813A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- waveguide
- rectangular
- cavity
- shaped body
- polarization switch
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
- H01P1/161—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion sustaining two independent orthogonal modes, e.g. orthomode transducer
Definitions
- the invention relates to a polarizing switch for illuminating the Parabolic reflector of a directional antenna, consisting of one for simultaneous Transmission of two orthogonal, linearly polarized electromagnetic waves suitable shaped body designed as a waveguide, on which two the two Rectangular waveguides separately connected to electromagnetic waves are connected which one of the rectangular waveguides in the course of the molded body with its end face in radial direction hitting the same is connected to its wall, while the other rectangular waveguide on an end face of the molded body on the same is connected, and in which both rectangular waveguides via openings are electromagnetically connected to the molded body, between which within the same a short-circuit element is arranged (DE 32 41 890 C2).
- Directional antennas are used for the wireless transmission of electromagnetic waves from one Place to another. They are used, for example, for radio relay, satellite radio and Radio location used and should have the highest possible efficiency. To they are equipped with pathogens that have a very high attenuation of the antennas Have sub-peaks in the disruptive directions, good adaptation and high profit.
- the exciters usually equipped with a food horn can with parabolic antennas be in focus. However, the antennas can also be called “backfire antennas" be equipped with a subreflector.
- Antennas are also known can be used for two separate electromagnetic waves. With such Antennas a polarization filter is used, in which two the two waves separately leading feed lines open.
- the two waves with reduced effort Cut With the polarization switch also used as an exciter after the input DE 32 41 890 C2 mentioned, the two waves with reduced effort Cut.
- the second rectangular waveguide is on one of its flat sides Front side of the polarization switch connected. This face is covered by the second Rectangular waveguide closed.
- the two rectangular waveguides are thereby at 90 ° mutually offset polarization direction connected to the polarization switch.
- the two waves are therefore fed directly at right angles to each other. You are on decoupled perfectly without additional parts.
- For low reflection on and Coupling of the shafts uses adjustable tuning elements.
- the invention has for its object the polarization switch described above easier to design.
- This polarization switch is easy to manufacture. Before attaching the two Rectangular waveguides only need the two transitions formed in the molded body or with to be connected to it. Then the two rectangular waveguides can be directly and connected to the molded body or the second transition without additional elements become. The two transitions represent the low-reflection coupling and decoupling of the waves safe for both rectangular waveguides. Additional coordination is not necessary. On separate tuning elements can therefore be dispensed with.
- Fig. 1 shows a schematic representation of an antenna with polarization switch according to the Invention.
- Fig. 2 is a view of the polarization switch with connected second transition in enlarged view.
- Embodiment is a so-called "backfire antenna”.
- a polarizing switch 2 is arranged, the structure of which is shown in FIGS. 2 to 7 in more detail emerges.
- the polarization switch 2 are two with a transmit and Rectangular waveguide 3 and 4 connected to the receiving device - hereinafter briefly “first Waveguide 3 "and” second waveguide 4 "- connected.
- the after Subreflector principle exciter 5 is also via a waveguide 6 with the Polarization switch 2 connected.
- the polarization switch 2 is also used for direct illumination of the reflector 1 become.
- the polarization switch 2 is shown enlarged in FIG. 2. It consists of one Waveguide enclosing molded body 7, which in the illustrated embodiment has a square cross section.
- the molded body 7 could also be a round or have any geometrical cross-section.
- the enclosed waveguide can be one have a circular or square cross-section.
- the first waveguide 3 is connected to the molded body 7 so that it tapers radially to the same with its Face is fixed to the wall.
- the end of the second waveguide 4 is connected at the free end of the second transition 8. He is at his junction on the molded body 7 rotated by 90 ° with respect to the first waveguide 3.
- the first waveguide 3 is in the wall of the molded body 7 Opening attached, which is designed as an aperture 9.
- the two are separated by the same supplied electromagnetic waves rotated by 90 ° in their direction of polarization fed the waveguide of the shaped body 7. This is due to that in FIGS. 3 and 4 indicated arrows. 3 is only the aperture for the sake of simplicity 9, while Fig. 4 shows an end view of the second transition 8.
- the both of the waveguides 3 and 4 guided waves are in this way at the Infeed decoupled perfectly, so that for the decoupling in the waveguide Shaped body 7 itself no elements are required. On or in the molded body 7 are only still elements are provided, the reflection and interference-free guidance of the waves guarantee.
- Short-circuit element can be provided between the connection points of the two waveguides 3 and 4 or between the aperture 9 and the second transition 8, for example consisting of pins 10
- the short-circuit element can also be used as a sheet be carried out. It is achieved in that the first waveguide 3rd injected wave only in the direction of the open end A of the molded body 7 can spread.
- connection points of the two waveguides 3 and 4 and the waveguide of the Shaped body 7 transitions are arranged, which is a low-reflection coupling of the Ensure waves in the waveguide.
- the first transition according to FIGS. 5 and 6 is provided for the first waveguide 3.
- He consists of a cavity 11 with an approximately rectangular cross section, at the end of which the aperture 9 is located.
- "Rectangular" means that the corners are not rectangular have to be. Depending on the manufacturing process, they can also be rounded.
- the webs 12 and 13 run in Axial direction of the cavity 11. They have a distance X from each other, the preferably 50% to 90% of the height H des determined by the shorter walls Cavity 11 is.
- Their axial length is a function of the wavelength ⁇ dimensioned first waveguide 3 guided shaft.
- the webs 12 and 13 therefore extend not necessarily over the entire length of the cavity 11. Their length is preferably between 0.25 ⁇ and 0.5 ⁇ .
- the first waveguide 3 is directly on the cavity 11 connected, as indicated in Fig. 6.
- the second transition 8 lies between the second waveguide 4 and the Shaped body 7, the enclosed waveguide here the opening for coupling the Wave forms. It is designed as a step transition with the usual technology for example a rectangular waveguide with a circular or square waveguide is connectable.
- the second transition 8, like the cavity 11, has an approximately rectangular cavity.
- the individual steps have a rectangular one Cross section with rounded corners.
- the second Transition 8 three levels S1, S2 and S3.
- the end of the second waveguide 4 is directly connected to the second transition 8.
- the The central axis of the second waveguide 4 is equal to the central axis of the molded body 7.
- the second Waveguide 4 can also be attached offset at the second transition 8. His The central axis is then, for example, in the direction of the E field with respect to the central axis of the molded body 7 offset.
- the molded body 7 shown in FIG. 2 can, for example, be in one piece and as a galvanoplastic be made very dimensionally, so that the low-reflection feed of the waves can still be improved.
- the polarization switch 2 has been described in the foregoing for the case that two waves are sent at the same time, i.e. are to be emitted by the reflector 1. she is however, just as good for the simultaneous reception of two by 90 ° in their Direction of polarization rotated waves. Also for simultaneous sending and If one of these waves is received, this polarization switch can be used.
Landscapes
- Aerials With Secondary Devices (AREA)
- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
Description
- daß zwischen dem radial angeschlossenen Rechteckhohlleiter und der zugehörigen, als Blende ausgeführten Öffnung ein als Hohlraum mit etwa rechteckigem Querschnitt ausgebildeter erster Übergang angebracht ist, in dem zwei in Achsrichtung verlaufende, von den breiteren Wandungen des Hohlraums abstehende und einander fluchtend gegenüber liegende Stege angeordnet sind und
- daß zwischen dem Formstück und dem stirnseitig angeschlossenen Rechteckhohlleiter ein einen Hohlraum mit etwa rechteckigem Querschnitt umschließender, in Stufen verlaufender zweiter Übergang angebracht ist, wobei der Rechteckhohlleiter mit seiner Stirnseite mit dem zweiten Übergang verbunden ist.
Claims (4)
- Polarisationsweiche zur Ausleuchtung des parabolischen Reflektors einer Richtantenne, bestehend aus einem zur simultanen Übertragung zweier orthogonaler, linear polarisierter elektromagnetischer Wellen geeigneten, als Hohlleiter ausgebildeten Formkörper, an welchen zwei die beiden elektromagnetischen Wellen getrennt führende Rechteckhohlleiter angeschlossen sind, bei welcher der eine Rechteckhohlleiter im Verlauf des Formkörpers mit seiner Stirnseite in radialer Richtung auf denselben auftreffend mit dessen Wandung verbunden ist, während der andere Rechteckhohlleiter an einer Stirnseite des Formkörpers an denselben angeschlossen ist, und bei welcher beide Rechteckhohlleiter über Öffnungen elektromagnetisch mit dem Formkörper verbunden sind, zwischen denen innerhalb desselben ein Kurzschlußelement angeordnet ist, dadurch qekennzeichnet,daß zwischen dem radial angeschlossenen Rechteckhohlleiter (3) und der zugehörigen, als Blende (9) ausgeführten Öffnung ein als Hohlraum (11) mit etwa rechteckigem Querschnitt ausgebildeter erster Übergang angebracht ist, in dem zwei in Achsrichtung verlaufende, von den breiteren Wandungen des Hohlraums (11) abstehende und einander fluchtend gegenüber liegende Stege (12,13) angeordnet sind unddaß zwischen dem Formstück (7) und dem stirnseitig angeschlossenen Rechteckhohlleiter (4) ein einen Hohlraum mit etwa rechteckigem Querschnitt umschließender, in Stufen verlaufender zweiter Übergang (8) angebracht ist, wobei der Rechteckhohlleiter (4) mit seiner Stirnseite mit dem zweiten Übergang (8) verbunden ist.
- Polarisationsweiche nach Anspruch 1, dadurch gekennzeichnet, daß die Mittelachse des stirnseitig angeschlossenen Rechteckhohlleiters (4) gleich der Mittelachse des Formkörpers (7) ist.
- Polarisationsweiche nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Abstand (X) der beiden Stege (12,13) voneinander 50 % bis 90 % der durch die kürzeren Wandungen des Hohlraums (11) bestimmten Höhe (H) desselben beträgt.
- Polarisationsweiche nach einem der Ansprüch 1 bis 3, dadurch gekennzeichnet, daß die axiale Länge der beiden Stege (12,13) zwischen dem 0,25-fachen und dem 0,5-fachen der Wellenlänge λ der Hohlleiterwelle liegt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19741999 | 1997-09-24 | ||
DE19741999A DE19741999A1 (de) | 1997-09-24 | 1997-09-24 | Polarisationsweiche zur Ausleuchtung einer Antenne |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0905813A2 true EP0905813A2 (de) | 1999-03-31 |
EP0905813A3 EP0905813A3 (de) | 2000-04-12 |
EP0905813B1 EP0905813B1 (de) | 2007-12-19 |
Family
ID=7843376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98402074A Expired - Lifetime EP0905813B1 (de) | 1997-09-24 | 1998-08-14 | Polarisationsweiche zur Ausleuchtung einer Antenne |
Country Status (5)
Country | Link |
---|---|
US (1) | US6130649A (de) |
EP (1) | EP0905813B1 (de) |
KR (1) | KR19990030061A (de) |
AU (1) | AU739731B2 (de) |
DE (2) | DE19741999A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1109245A2 (de) * | 1999-12-18 | 2001-06-20 | Alcatel | Antenne zur Abstrahlung und zum Empfang elektromagnetischer Wellen |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7053849B1 (en) | 2004-11-26 | 2006-05-30 | Andrew Corporation | Switchable polarizer |
US8077103B1 (en) | 2007-07-07 | 2011-12-13 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Cup waveguide antenna with integrated polarizer and OMT |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB767518A (en) * | 1954-02-08 | 1957-02-06 | British Thomson Houston Co Ltd | Improvements relating to electrical waveguide systems |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3369197A (en) * | 1965-01-05 | 1968-02-13 | Bell Telephone Labor Inc | Waveguide mode coupler |
US3696434A (en) * | 1971-01-15 | 1972-10-03 | Radiation Inc | Independent mode antenna feed system |
US3864688A (en) * | 1972-03-24 | 1975-02-04 | Andrew Corp | Cross-polarized parabolic antenna |
US4077039A (en) * | 1976-12-20 | 1978-02-28 | Bell Telephone Laboratories, Incorporated | Launching and/or receiving network for an antenna feedhorn |
US4258366A (en) * | 1979-01-31 | 1981-03-24 | Nasa | Multifrequency broadband polarized horn antenna |
FR2582449B1 (fr) * | 1979-07-24 | 1988-08-26 | Thomson Csf | Dispositif diplexeur de polarisations a large bande et antenne associee a un radar ou a un dispositif de contre-mesure comportant un tel dispositif |
IT1155664B (it) * | 1982-03-25 | 1987-01-28 | Sip | Dispositivo di guida d onda per la separazione di segnali a radiofrequenza di diversa frequenza e polarizzazione |
DE3241890A1 (de) * | 1982-11-12 | 1984-05-17 | kabelmetal electro GmbH, 3000 Hannover | Polarisationsweiche mit speisehorn |
US4797681A (en) * | 1986-06-05 | 1989-01-10 | Hughes Aircraft Company | Dual-mode circular-polarization horn |
CA1260609A (en) * | 1986-09-12 | 1989-09-26 | Her Majesty The Queen, In Right Of Canada, As Represented By The Minister Of National Defence | Wide bandwidth multiband feed system with polarization diversity |
US5162808A (en) * | 1990-12-18 | 1992-11-10 | Prodelin Corporation | Antenna feed with selectable relative polarization |
DE4113760C2 (de) * | 1991-04-26 | 1994-09-01 | Hirschmann Richard Gmbh Co | Anordnung zur Umwandlung eines Mikrowellentyps |
US5434585A (en) * | 1992-11-20 | 1995-07-18 | Gardiner Communications, Inc. | Microwave antenna having a ground isolated feedhorn |
DE29511273U1 (de) * | 1995-07-12 | 1995-09-21 | Alcatel Kabel Ag | Polarisationsweiche zur Ausleuchtung einer Antenne |
-
1997
- 1997-09-24 DE DE19741999A patent/DE19741999A1/de not_active Withdrawn
-
1998
- 1998-08-14 EP EP98402074A patent/EP0905813B1/de not_active Expired - Lifetime
- 1998-08-14 DE DE59814142T patent/DE59814142D1/de not_active Expired - Lifetime
- 1998-09-02 US US09/145,753 patent/US6130649A/en not_active Expired - Fee Related
- 1998-09-14 AU AU84220/98A patent/AU739731B2/en not_active Ceased
- 1998-09-23 KR KR1019980039406A patent/KR19990030061A/ko not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB767518A (en) * | 1954-02-08 | 1957-02-06 | British Thomson Houston Co Ltd | Improvements relating to electrical waveguide systems |
Non-Patent Citations (1)
Title |
---|
BOIFOT A M: "CLASSIFICATION OF ORTHO-MODE TRANSDUCERS" EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS AND RELATED TECHNOLOGIES,IT,AEI, MILANO, Bd. 2, Nr. 5, 1. September 1991 (1991-09-01), Seiten 35-42, XP000266379 ISSN: 1120-3862 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1109245A2 (de) * | 1999-12-18 | 2001-06-20 | Alcatel | Antenne zur Abstrahlung und zum Empfang elektromagnetischer Wellen |
EP1109245A3 (de) * | 1999-12-18 | 2002-09-04 | Alcatel | Antenne zur Abstrahlung und zum Empfang elektromagnetischer Wellen |
Also Published As
Publication number | Publication date |
---|---|
DE19741999A1 (de) | 1999-03-25 |
DE59814142D1 (de) | 2008-01-31 |
EP0905813B1 (de) | 2007-12-19 |
US6130649A (en) | 2000-10-10 |
AU739731B2 (en) | 2001-10-18 |
EP0905813A3 (de) | 2000-04-12 |
KR19990030061A (ko) | 1999-04-26 |
AU8422098A (en) | 1999-04-15 |
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