EP0897197A2 - Polarisationweiche für zwei unterschiedliche Frequenzbänder - Google Patents
Polarisationweiche für zwei unterschiedliche Frequenzbänder Download PDFInfo
- Publication number
- EP0897197A2 EP0897197A2 EP98401804A EP98401804A EP0897197A2 EP 0897197 A2 EP0897197 A2 EP 0897197A2 EP 98401804 A EP98401804 A EP 98401804A EP 98401804 A EP98401804 A EP 98401804A EP 0897197 A2 EP0897197 A2 EP 0897197A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- waveguide
- arms
- frequency band
- 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.)
- Withdrawn
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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
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
- H01P1/2131—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies with combining or separating polarisations
Definitions
- the invention relates to a polarization switch for two different ones Frequency bands for illuminating an antenna with a parabolic reflector, consisting of a waveguide section in which two are perpendicular to each other per frequency band standing, linearly polarized waves are feasible, in which two per frequency band Waveguide with a rectangular cross section separated from one another and in the axial direction of the Waveguide section are offset from each other connected to the same, in which for the lower frequency band for each polarization direction directly to the waveguide Waveguide section is connected, in which each of the higher frequency band two waveguides from one connection point in two arms with the same rectangular cross-section is divided into two diametrically opposite positions in the Open waveguide section and at which the points where the arms for the two different polarization directions open into the waveguide section by 90 ° in The circumferential direction are offset from one another (EP 0 096 461 B1).
- Polarization switches are used, for example, for the illumination of antennas Parabolic reflector used for directional radio, satellite radio or radio location. You can thereby for illuminating the reflector via a subreflector (for example Cassegrain principle) or for direct illumination of the same. "Illumination” is intended to mean both directions of transmission of the electromagnetic waves include, both waves to be emitted and to be received. In such Polarization switches become two linearly polarized, electromagnetic waves of the same Frequency band guided so that their polarization directions orthogonal to each other run. Then the two waves do not interfere. There are polarization switches for one Frequency band and known for two different frequency bands.
- GB 2,117,980 A1 describes a polarization switch for two different ones Frequency bands It consists of two axially arranged one behind the other Sections with a circular cross-section and different inner diameters. Two each Waveguides are connected to one of these sections. The section with the larger one Inside diameter also has two different inside diameters, the two waveguides of this section in areas with different Open inside diameters. This polarization switch is only with great effort producible because the two different sized sections individually and under Compliance with the tightest tolerances must be put together.
- the waveguides for the higher frequency band are divided into two arms from a connection point, the diametrically opposite points open into the waveguide section.
- the connection point is designed as a T-shaped hybrid coupler and with two connections Mistake. In normal operation, one is connected to the hybrid coupler via a waveguide section connected connection of the respective waveguide coupled in phase. The other, Connection that is not in phase is covered by a short-circuit plate.
- the structure of these Polarization switch very much in the part which concerns the higher frequency band complex. These parts also represent additional weights, so that the assembly of the Polarization switch on the reflector of an antenna is difficult.
- the invention is based, the polarization switch described in the task to simplify their construction.
- This polarization filter is not only in the range of the lower frequency band, but also in its part relating to the higher frequency band simply constructed. It is pro Polarization direction only one connection available for the respective waveguide, which is also the connection point. At this junction, which also functions as a The two arms are directly connected. One of the arms is in twisted its course by 180 °. It is therefore without additional material assured simple way. that the waves divided at the junction in phase in the waveguide section are fed so that they add together without interference. The The weight of this polarization switch is correspondingly low.
- the shorter one is used instead of the word “polarization switch” Word “switch” used.
- the switch can be used for both to be radiated by an antenna can also be used for waves to be received. For example, it is separate Guidance of waves of the frequency band 3.6 to 4.2 GHz on the one hand and the Frequency band 6.425 to 7.125 GHz on the other hand suitable. Of the two different frequency bands is the one with the lower frequencies than "Lower band” and that with the higher frequencies is referred to as "upper band”. In Fig. 1 is one Antenna shown with subreflector. The W switch can also be used for direct illumination an antenna can be used.
- the waveguides 5 and 6 are provided for the lower band, while in the waveguides 7 and 8 the waves of the upper band are guided.
- the four waveguides 5 to 8 have one rectangular cross section. For the sake of simplicity, they are not shown in FIG. 2.
- the Soft W is equipped with four flanges 9, 10, 11 and 12, to each of which one of the Waveguide 5 to 8 is connected.
- the feed horn 4 can be attached to the flange 13 become.
- the switch W consists of an area 14 for the lower belt and an area 15 for the Upper band.
- the area 14 is in the illustrated embodiment as a circular waveguide executed.
- the waveguide 5 is on the flange 9 on the face of the switch W connected, while the waveguide 6 radially in the region 14 via the flange 10 flows into.
- Circles 16 indicate short-circuiting and tuning elements which lead to interference-free propagation of the orthogonally polarized waves in the switch W is required are.
- the area 15 of the switch W can also be designed as a circular waveguide.
- the soft W could then be formed in one piece by a circular waveguide.
- the region 15 has a square cross section. Between Areas 14 and 15 of the switch W are provided with a low-reflection transition 17. To the Area 15 is the waveguide 7 via the flange 11 and the waveguide 8 via the flange 12 connected.
- the waves of the lower belt must also be guided in area 15 of the switch W, it has correspondingly large clear dimensions.
- For the waves of the upper band is therefore a symmetrical connection is required so that no higher modes are excited.
- Two of the connection point for the waveguide 7 formed by the flange 11 go for this Arms 18 and 19, the diametrically opposite positions in the two Open area 15 of the turnout W.
- the arms 18 and 19 are rectangular waveguides executed. They have the same dimensions, i.e. the same cross section.
- the arm 19 is in twisted its course by an angle of 180 °.
- the arms 18 and 19 lie directly at their free ends with their large flat sides to each other. They are aligned with their ends that protrude into the flange 11. Of the Waveguide 7 is thus connected directly to the arms 18 and 19. Inside the flange 11 finds a power division of the waves fed via the waveguide 7 into two equally strong partial waves instead. They will perform equally well in arms 18 and 19 continued and because of the torsion of the arm 19 by 180 ° in phase in the area 15 the soft W fed. The two partial waves are added there. This Mode of operation of the two arms 18 and 19 applies analogously to the other Direction of transmission.
- the arms 18 and 19 are designed as flat waveguides. You have preferred Embodiment the same width as the waveguide 7 to be connected to the flange 11, but only half the height of it. Both arms 18 and 19 are aligned at their end End faces flat on each other. When looking at the flange 11, this results in FIG. 3 shown image. This picture looks different if arms 18 and 19 are different Have dimensions, especially larger ones. For the arms 18 and 19 can also Flat waveguide with the dimensions of the waveguide 7 are used. In these cases adjust the transition area between the waveguide 7 and arms 18 and 19 so that none Reflections arise. In the region of the flange 11, the Arms 18 and 19 common capacitive and inductive tuning elements are attached.
- Circles 22 and 23 are again used for interference-free propagation of the waves Voting elements indicated
Landscapes
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
- daß an jeder der beiden Anschlußstellen die beiden Arme mit ihren breiteren Flachseiten derart direkt aneinander liegen, daß ihre stirnseitigen Enden zum Anschluß des jeweiligen Hohlleiters miteinander fluchten und
- daß jeweils einer der Arme der beiden unterschiedlichen Polarisationsrichtungen in seinem Verlauf um einen Winkel von 180° tordiert ist
- Fig. 1
- in schematischer Darstellung eine Antenne mit Subreflektor und Polarisationsweiche.
- Fig. 2
- eine perspektivische Ansicht der Polarisationsweiche nach der Erfindung in vergrößerter Darstellung.
- Fig. 3
- eine Draufsicht auf eine Anschlußstelle der Polarisationsweiche nach Fig. 2 in weiter vergrößerter Darstellung.
Claims (3)
- Polarisationsweiche für zwei unterschiedliche Frequenzbänder zur Ausleuchtung einer Antenne mit parabolischem Reflektor, bestehend aus einem Hohlleiterabschnitt, in welchem pro Frequenzband zwei senkrecht aufeinander stehende, linear polarisierte Wellen führbar sind, bei welcher pro Frequenzband zwei Hohlleiter mit rechteckigem Querschnitt getrennt voneinander und in Achsrichtung des Hohlleiterabschnitts gegeneinander versetzt an denselben angeschlossen sind, bei welcher für das niedrigere Frequenzband für jede Polarisationsrichtung jeweils ein Hohlleiter direkt an den Hohlleiterabschnitt angeschlossen ist, bei welcher für das höhere Frequenzband jeder der beiden Hohlhleiter ab einer Anschlußstelle in zwei Arme mit gleichem, rechteckigem Querschnitt aufgeteilt ist, die an zwei einander diametral gegenüber liegenden Stellen in den Hohlleiterabschnitt einmünden und bei welcher die Stellen, an denen die Arme für die beiden unterschiedlichen Polarisationsrichtungen in den Hohlleiterabschnitt einmünden, um 90° in Umfangsrichtung gegeneinander versetzt sind, dadurch gekennzeichnet,daß an jeder der beiden Anschlußstellen (11,12) die beiden Arme (18,19,20,21) mit ihren breiteren Flachseiten derart direkt aneinander liegen, daß ihre stirnseitigen Enden zum Anschluß des jeweiligen Hohlleiters (7,8) miteinander fluchten unddaß jeweils einer der Arme (19,21) der beiden unterschiedlichen Polarisationsrichtungen in seinem Verlauf um einen Winkel von 180 ° tordiert ist.
- Polarisationsweiche nach Anspruch 1, dadurch gekennzeichnet, daß der Hohlleiterabschnitt durchgehend einen kreisrunden Querschnitt hat.
- Polarisationsweiche nach Anspruch 1, dadurch gekennzeichnet, daß der Hohlleiterabschnitt im Bereich des niedrigeren Frequenzbandes einen kreisrunden und im Bereich des höheren Frequenzbandes einen quadratischen Querschnitt hat. mit einem reflexionsarmen Übergang (17) zwischen den beiden unterschiedlichen Querschnittsformen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19734854A DE19734854A1 (de) | 1997-08-12 | 1997-08-12 | Polarisationsweiche für zwei unterschiedliche Frequenzbänder |
| DE19734854 | 1997-08-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0897197A2 true EP0897197A2 (de) | 1999-02-17 |
| EP0897197A3 EP0897197A3 (de) | 1999-12-08 |
Family
ID=7838709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98401804A Withdrawn EP0897197A3 (de) | 1997-08-12 | 1998-07-17 | Polarisationweiche für zwei unterschiedliche Frequenzbänder |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6181222B1 (de) |
| EP (1) | EP0897197A3 (de) |
| AU (1) | AU738933B2 (de) |
| BR (1) | BR9803137A (de) |
| DE (1) | DE19734854A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10126468B4 (de) * | 2001-05-31 | 2007-07-05 | Eads Deutschland Gmbh | Schlitzantenne |
| WO2019203903A2 (en) * | 2017-12-20 | 2019-10-24 | Optisys, LLC | Integrated tracking antenna array combiner network |
| EP4295440B1 (de) * | 2021-03-30 | 2024-12-04 | Viasat Inc. | Hochintegrierte antennenspeiseanordnung |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3274604A (en) | 1958-12-12 | 1966-09-20 | Bernard L Lewis | Multi-mode simultaneous lobing antenna |
| DE2517383C3 (de) * | 1975-04-19 | 1979-03-01 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Systemweiche für Frequenzdoppelausnutzung |
| US4467294A (en) | 1981-12-17 | 1984-08-21 | Vitalink Communications Corporation | Waveguide apparatus and method for dual polarized and dual frequency signals |
| 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 |
| US4504805A (en) | 1982-06-04 | 1985-03-12 | Andrew Corporation | Multi-port combiner for multi-frequency microwave signals |
| JPS59131201A (ja) * | 1983-08-04 | 1984-07-28 | Nec Corp | 広帯域モ−ド変換器 |
| FR2593644B1 (fr) | 1986-01-28 | 1988-03-11 | Alcatel Espace | Dispositif duplexeur de polarisation et de frequences a trois acces. |
| GB2188493A (en) * | 1986-03-27 | 1987-09-30 | Era Patents Ltd | Orthogonal mode transducer |
-
1997
- 1997-08-12 DE DE19734854A patent/DE19734854A1/de not_active Withdrawn
-
1998
- 1998-07-17 EP EP98401804A patent/EP0897197A3/de not_active Withdrawn
- 1998-08-06 US US09/130,429 patent/US6181222B1/en not_active Expired - Fee Related
- 1998-08-10 AU AU78948/98A patent/AU738933B2/en not_active Ceased
- 1998-08-11 BR BR9803137-6A patent/BR9803137A/pt not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| BR9803137A (pt) | 1999-11-03 |
| AU738933B2 (en) | 2001-09-27 |
| AU7894898A (en) | 1999-02-25 |
| DE19734854A1 (de) | 1999-02-18 |
| EP0897197A3 (de) | 1999-12-08 |
| US6181222B1 (en) | 2001-01-30 |
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