EP0897197A2 - Aiguillage de polarisation pour deux bandes de fréquence différentes - Google Patents

Aiguillage de polarisation pour deux bandes de fréquence différentes Download PDF

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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Withdrawn
Application number
EP98401804A
Other languages
German (de)
English (en)
Other versions
EP0897197A3 (fr
Inventor
Udo Dipl.-Ing. Seewig
Reimer Dr.-Ing. Nagel
Daniel Dr.-Ing. Wojtkowiak
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.)
Alcatel Lucent SAS
Nokia Inc
Original Assignee
Alcatel SA
Nokia Inc
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 Alcatel SA, Nokia Inc filed Critical Alcatel SA
Publication of EP0897197A2 publication Critical patent/EP0897197A2/fr
Publication of EP0897197A3 publication Critical patent/EP0897197A3/fr
Withdrawn legal-status Critical Current

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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

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  • Aerials With Secondary Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP98401804A 1997-08-12 1998-07-17 Aiguillage de polarisation pour deux bandes de fréquence différentes Withdrawn EP0897197A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19734854 1997-08-12
DE19734854A DE19734854A1 (de) 1997-08-12 1997-08-12 Polarisationsweiche für zwei unterschiedliche Frequenzbänder

Publications (2)

Publication Number Publication Date
EP0897197A2 true EP0897197A2 (fr) 1999-02-17
EP0897197A3 EP0897197A3 (fr) 1999-12-08

Family

ID=7838709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401804A Withdrawn EP0897197A3 (fr) 1997-08-12 1998-07-17 Aiguillage de polarisation pour deux bandes de fréquence différentes

Country Status (5)

Country Link
US (1) US6181222B1 (fr)
EP (1) EP0897197A3 (fr)
AU (1) AU738933B2 (fr)
BR (1) BR9803137A (fr)
DE (1) DE19734854A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10126468B4 (de) * 2001-05-31 2007-07-05 Eads Deutschland Gmbh Schlitzantenne
WO2019203902A2 (fr) * 2017-12-20 2019-10-24 Optisys, LLC Réseau d'antennes de poursuite intégré
US12580291B2 (en) * 2021-03-30 2026-03-17 Viasat, Inc. Highly-integrated antenna feed assembly

Family Cites Families (8)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
EP0897197A3 (fr) 1999-12-08
AU738933B2 (en) 2001-09-27
AU7894898A (en) 1999-02-25
US6181222B1 (en) 2001-01-30
DE19734854A1 (de) 1999-02-18
BR9803137A (pt) 1999-11-03

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