EP0154692A1 - Filtre de polarisation pour deux bandes de fréquences - Google Patents
Filtre de polarisation pour deux bandes de fréquences Download PDFInfo
- Publication number
- EP0154692A1 EP0154692A1 EP84114833A EP84114833A EP0154692A1 EP 0154692 A1 EP0154692 A1 EP 0154692A1 EP 84114833 A EP84114833 A EP 84114833A EP 84114833 A EP84114833 A EP 84114833A EP 0154692 A1 EP0154692 A1 EP 0154692A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- waveguide
- polarization
- fin
- band
- line structure
- 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
- H01P1/20—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
-
- 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 present invention relates to a two-band polarization switch, consisting of a waveguide with waveguide couplings, for four signals, means being provided which bring about frequency and polarization separation of the four signals, each of which is assigned to two different frequency bands and one to two orthogonal polarizations .
- Such a two-band polarizing switch is known from DE-OS 24 43 166. It is equipped with relatively complex means for the separation of the frequency bands and polarizations in order to meet the particularly high demands placed on satellite radio, in particular for high polarization decoupling, low losses and large decoupling between the signal paths of different frequency bands.
- the invention is based on the object of specifying a two-band polarization switch of the type mentioned at the outset, which is implemented with as little effort as possible, but still has good values with regard to polarization decoupling, attenuation and frequency band decoupling.
- this object is achieved in that in a first waveguide section, a fin line structure aligned parallel to a polarization is provided with a line branching and frequency-selective elements, is present, with which the signals of one polarization direction are separated in frequency and led to two waveguide outputs, and that a fin line structure aligned parallel to the other polarization is arranged in a second waveguide section, which is also provided with a line branching and frequency-selective elements, with which the signals of the other Frequency direction of polarization separated and led to two further waveguide outputs.
- 1 and 2 show the longitudinal sections through two two-band polarization switches, with different fin line structures.
- the two-band polarization switch shown in Fig. 1 has a double polarizable waveguide section HL1 with z. B. square or round cross-section.
- a fin line structure F1 is arranged in a longitudinal sectional plane that runs through the longitudinal axis of the waveguide section HL1.
- the fin line structure can be omitted from an electrically conductive sheet metal or can be metallized on a dielectric substrate.
- This fin line structure F1 introduced in the waveguide section HL1 is only intended to couple the signals of one polarization direction.
- the fine line structure F1 is therefore aligned parallel to this polarization direction.
- the transition from the waveguide section HL1 to the fin guide FL1 takes place by continuous (or also step-like) widening of the fin guide to the waveguide diameter.
- This fin conductor FL1 couples itself in the waveguide section HL1 propagating signals of two frequency bands (e.g. 6 GHz, 4 GHz) and leads them to a branch V1, from which a fin conductor FL2 leads to a waveguide output HA1 and a fin conductor FL3 provided with a low-pass filter structure FF1.
- the signal of the higher frequency band (6 GHz) is coupled from the fin conductor FL2 to the waveguide output provided with a step transformer ST, which due to its dimensioning has high-pass characteristics.
- the step transformer ST serves on the one hand for the impedance transformation from the fin conductor FL2 to the connection cross section QA of the waveguide output HA1 and on the other hand produces a tapering of the broadside of the waveguide, so that an increased high-pass effect arises.
- the signal of the lower frequency band (4 GHz) is coupled out of the fin conductor FL3 via the inner conductor IL of a coaxial conductor output KA.
- the first waveguide section HL1 is followed by a second waveguide section HL2, which can either be double-polarized like the first one or has a cross-sectional shape such that only signals of a single polarization can propagate in it.
- the second waveguide section HL2 is equipped in the same way with a fin line structure F2 as the first waveguide section HL1. Only the fin line structure F2 in the waveguide section HL2 is rotated 90 ° axially relative to the fin line structure F1 in the waveguide section HL1, so that the signals of the other polarization, which is orthogonal to the polarization detected by the fin line structure F1, are coupled into the fin line structure F2.
- the waveguide output HA2 having high-pass characteristics is determined and for the signal of the lower frequency band (4 GHz), the coaxial conductor output KA2.
- Both signal outputs HA2 and KA2 have the same dimensions as that corresponding signal outputs HA1 and KA1 of the waveguide section HL1.
- the second exemplary embodiment of a two-band polarizing switch shown in FIG. 2 is the same as the first exemplary embodiment according to FIG. 1 except for the type of frequency band separation by the fin line structures F3 and F4 in the waveguide sections HL3 and HL4.
- fin conductor FL3 which carries both frequency bands, branches into fin conductor FL4 provided with a low-pass structure FF2 and fin conductor FL5 provided with a band-pass structure FF3.
- the fin conductor FL4 couples the signal of the lower frequency band (4 GHz) to the waveguide output HA3 and the fin conductor FL5 of the signal of the higher frequency band (6 GHz) to the waveguide output HA4. All transitions from fin conductors to waveguides take place by continuous (or also step-like) expansion of the fin conductors to the diameter of the waveguides.
- the fin line structure F4 inserted into the second waveguide section HL4 has the same shape as the fin line structure F3 in the first waveguide section HL3. It couples the signal of the lower frequency band or the higher frequency band to the waveguide outputs HA5 or HA6.
- the fin line structure should be chosen to be correspondingly long at the end.
- the fin line structure acts like a load in the waveguide (comparable to a ridge waveguide), which dampens disruptive higher wave types. Any interference waves that are still present are eliminated by absorption bodies A1, A2 arranged at the end of the second waveguide section HL2, HL4.
- the inventive idea described allows some possible variations with regard to the filter structures. It is possible, for example, for two bandpass structures or a bandpass and a bandstop to branch off from the branching V1, V2.
- the waveguide sections HL1, HL2 or HL3, HL4 can be designed as double-ridge waveguides.
- the transition from waveguide to fin conductor would not take place gradually but abruptly.
Landscapes
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3406641 | 1984-02-24 | ||
DE19843406641 DE3406641A1 (de) | 1984-02-24 | 1984-02-24 | Zweiband-polarisationsweiche |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0154692A1 true EP0154692A1 (fr) | 1985-09-18 |
EP0154692B1 EP0154692B1 (fr) | 1988-05-11 |
Family
ID=6228656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84114833A Expired EP0154692B1 (fr) | 1984-02-24 | 1984-12-06 | Filtre de polarisation pour deux bandes de fréquences |
Country Status (4)
Country | Link |
---|---|
US (1) | US4622524A (fr) |
EP (1) | EP0154692B1 (fr) |
CA (1) | CA1227839A (fr) |
DE (2) | DE3406641A1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0185446A2 (fr) * | 1984-10-12 | 1986-06-25 | British Aerospace Public Limited Company | Emetteur-récepteur |
FR2593644A1 (fr) * | 1986-01-28 | 1987-07-31 | 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 |
AU589236B2 (en) * | 1985-12-06 | 1989-10-05 | Siemens Aktiengesellschaft | Waveguide arrangements for transmission of radio-relay signals in two or more radio-relay frequency bands |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4737741A (en) * | 1986-10-20 | 1988-04-12 | Hughes Aircraft Company | Orthogonal mode electromagnetic wave launcher |
DE3840450A1 (de) * | 1988-12-01 | 1990-06-07 | Telefunken Systemtechnik | Modenkoppler fuer monopulsanwendungen |
US5923229A (en) * | 1997-09-12 | 1999-07-13 | Wytec, Inc. | Simultaneous polarization and frequency filtering of transmitter and receiver signals in single antenna systems |
US6529098B2 (en) * | 2000-03-01 | 2003-03-04 | Prodelin Corporation | Transmitting and receiving apparatus for satellite communication via dual-polarized signals |
US6661309B2 (en) * | 2001-10-22 | 2003-12-09 | Victory Industrial Corporation | Multiple-channel feed network |
US7236681B2 (en) * | 2003-09-25 | 2007-06-26 | Prodelin Corporation | Feed assembly for multi-beam antenna with non-circular reflector, and such an assembly that is field-switchable between linear and circular polarization modes |
CA2496235C (fr) | 2005-02-04 | 2011-11-15 | James Plant | Filtre de polarisation utilisant l'angle de brewster |
US7808427B1 (en) | 2009-05-28 | 2010-10-05 | Raytheon Company | Radar system having dual band polarization versatile active electronically scanned lens array |
JP5806098B2 (ja) * | 2010-12-20 | 2015-11-10 | 日本電信電話株式会社 | フィンライン型偏波分離器 |
DE102013011651A1 (de) * | 2013-07-11 | 2015-01-15 | ESA-microwave service GmbH | Antennen-Speisesystem im Mikrowellenbereich für Reflektorantennen |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2907959A (en) * | 1956-05-21 | 1959-10-06 | Bell Telephone Labor Inc | Finline phase shifter |
US2921272A (en) * | 1941-07-25 | 1960-01-12 | Bell Telephone Labor Inc | Finline coupler |
US2923901A (en) * | 1941-07-25 | 1960-02-02 | robertson | |
GB835575A (en) * | 1955-12-21 | 1960-05-25 | Standard Telephones Cables Ltd | An improved multiplexing and filtering device for the u.h.f. band |
EP0021426A1 (fr) * | 1979-06-27 | 1981-01-07 | Siemens Aktiengesellschaft | Mélangeur pour microondes et ondes millimétriques |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS583401B2 (ja) * | 1972-05-23 | 1983-01-21 | 日本放送協会 | マイクロハカイロ |
DE2443166C3 (de) * | 1974-09-10 | 1985-05-30 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Systemweiche zur Trennung zweier Signale, die aus je zwei doppelt polarisierten Frequenzbändern bestehen |
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 |
-
1984
- 1984-02-24 DE DE19843406641 patent/DE3406641A1/de not_active Withdrawn
- 1984-12-06 DE DE8484114833T patent/DE3471206D1/de not_active Expired
- 1984-12-06 EP EP84114833A patent/EP0154692B1/fr not_active Expired
-
1985
- 1985-02-22 CA CA000474918A patent/CA1227839A/fr not_active Expired
- 1985-02-22 US US06/704,097 patent/US4622524A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2921272A (en) * | 1941-07-25 | 1960-01-12 | Bell Telephone Labor Inc | Finline coupler |
US2923901A (en) * | 1941-07-25 | 1960-02-02 | robertson | |
GB835575A (en) * | 1955-12-21 | 1960-05-25 | Standard Telephones Cables Ltd | An improved multiplexing and filtering device for the u.h.f. band |
US2907959A (en) * | 1956-05-21 | 1959-10-06 | Bell Telephone Labor Inc | Finline phase shifter |
EP0021426A1 (fr) * | 1979-06-27 | 1981-01-07 | Siemens Aktiengesellschaft | Mélangeur pour microondes et ondes millimétriques |
Non-Patent Citations (1)
Title |
---|
IRE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, Band MTT-4, Nr. 4, Oktober 1956, Seiten 263-267, New York, US; S.D. ROBERTSON: "Recent advances in finline circuits" * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0185446A2 (fr) * | 1984-10-12 | 1986-06-25 | British Aerospace Public Limited Company | Emetteur-récepteur |
EP0185446A3 (fr) * | 1984-10-12 | 1988-03-30 | British Aerospace Public Limited Company | Emetteur-récepteur |
AU589236B2 (en) * | 1985-12-06 | 1989-10-05 | Siemens Aktiengesellschaft | Waveguide arrangements for transmission of radio-relay signals in two or more radio-relay frequency bands |
FR2593644A1 (fr) * | 1986-01-28 | 1987-07-31 | Alcatel Espace | Dispositif duplexeur de polarisation et de frequences a trois acces. |
EP0235565A1 (fr) * | 1986-01-28 | 1987-09-09 | Alcatel Espace | Dispositif duplexeur de polarisation et de fréquences à trois accès |
US4837531A (en) * | 1986-01-28 | 1989-06-06 | Alcatel Espace | Three-access polarization and frequency duplexing device |
GB2188493A (en) * | 1986-03-27 | 1987-09-30 | Era Patents Ltd | Orthogonal mode transducer |
Also Published As
Publication number | Publication date |
---|---|
CA1227839A (fr) | 1987-10-06 |
DE3471206D1 (en) | 1988-06-16 |
EP0154692B1 (fr) | 1988-05-11 |
US4622524A (en) | 1986-11-11 |
DE3406641A1 (de) | 1985-08-29 |
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