EP0154692B1 - Polarisation-selective circuit for two frequency bands - Google Patents
Polarisation-selective circuit for two frequency bands Download PDFInfo
- Publication number
- EP0154692B1 EP0154692B1 EP84114833A EP84114833A EP0154692B1 EP 0154692 B1 EP0154692 B1 EP 0154692B1 EP 84114833 A EP84114833 A EP 84114833A EP 84114833 A EP84114833 A EP 84114833A EP 0154692 B1 EP0154692 B1 EP 0154692B1
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- EP
- European Patent Office
- Prior art keywords
- fin
- signals
- hollow waveguide
- polarization
- waveguide section
- 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.)
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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 polarization switch is known from DE ⁇ S 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.
- a fin line structure aligned parallel to a polarization provided with a line branching and frequency-selective elements, with which the signals of the one polarization direction are separated in terms of frequency and lead to two waveguide outputs
- a fin line structure aligned parallel to the other polarization is arranged, which is also provided with a line branching and frequency-selective elements, with which the signals of the other polarization direction are separated in terms of frequency and routed 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 e.g. 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 HL 1 is only intended to couple the signals of one polarization direction.
- the fin line structure F1 is therefore aligned parallel to this polarization direction.
- the transition from Hohlle i terab mustard HL1 to the Finleiter FL1 is carried out by continuous (or stepwise) widening of the Finle i ters on the waveguide diameter.
- This fin i ter FL1 couples the signals of two frequency bands (for example 6 GHz, 4 GHz) propagating in the waveguide section HL1 to a branching V1; from which a fin conductor FL2 leads to a waveguide output HA1 and a fin i ter 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 is on the one hand for impedance transformation from Finleiter FL2 on the connection cross-section of the QA Hohlle i terausganges HA1 and on the other hand produces a rejuvenation of Hohlleiterbreitse te i, so that an enhanced high-pass effect is created.
- 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 KA1.
- a second waveguide section HL2 adjoins, either the same as the first is stronglypolarisierbar or such a cross section shape that in it only signals of a single polarization can propagate.
- 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 effetspatented F2 is axially rotated in the waveguide section HL2 by 90 ° relative to the Fin effets Modell F1 in the waveguide section HL1, so that in the Fin effetspatented F2, the signals of the other polarization which is orthogonal to the information detected by the Finle i tungs- structure F1 polarization, coupled will.
- the high-pass waveguide output HA2 is intended for the signal of the higher frequency band (6 GHz) and the coaxial conductor output KA2 is intended for the signal of the lower frequency band (4 GHz). Both signal outputs HA2 and KA2 have the same dimensions as the corresponding signal outputs HA1 and KA1 of the waveguide section HL1 .
- the second exemplary embodiment of a two-band polarization 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.
- the fin conductor FL3 which carries both frequency bands, branches into the one which is provided with a low-pass structure FF2 Fin conductor FL4 and the fin conductor FL5 provided with a bandpass 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 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 concept described allows some possible variations with regard to the filter structures. It is possible, for example, that two bandpass structures or a bandpass and a bandstop come from the branching V1, V2.
- the waveguide sections HL1, HL2 or HL3, HL4 can be designed as double-ridge waveguides.
- the waveguide-fin conductor transition would not take place gradually but abruptly.
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- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Description
Die vorliegende Erfindung betrifft eine Zweiband-Polarisationsweiche, bestehend aus einem Hohlleiter mit Wellenleiterankopplungen, für vier Signale, wobei Mittel vorhanden sind, welche eine Frequenz- und Polarisationstrennung der vier Signale bewirken, von denen jedes einem zweier unterschiedlicher Frequenzbänder und einer zweier orthogonaler Polarisationen zugeordnet ist.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 .
Eine derartige Zweiband-Polarisationsweiche ist aus der DEΩS 24 43 166 bekannt. Sie ist mit relativ aufwendigen Mitteln für die Trennung der Frequenzbänder und Polarisationen ausgestattet, um den gerade im Satellitenfunk gestellten, besonders hohen Anforderungen an hohe Polarisationsentkopplung, geringe Verluste und grosse Entkopplung zwischen den Signalwegen unterschiedlicher Frequenzbänder zu genügen.Such a two-band polarization switch is known from DEΩS 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.
Die für den Satellitenfunk verlangten extrem hohen Anforderungen an eine Zweiband-Polarisationsweiche können bei der Anwendung in der Richtfunktechnik abgeschwächt werden. Für den Einsatz beim Richtfunk würde daher eine weniger aufwendige Zweiband-Polarisationsweiche als die aus der DE-OS 24 43166 bekannt ausreichen.The extremely high requirements for a two-band polarizing filter required for satellite radio can be weakened when used in directional radio technology. A less complex two-band polarizing switch than that known from DE-OS 24 43166 would therefore suffice for use in directional radio.
Der Erfindung liegt nun die Aufgabe zugrunde, eine Zweiband-Polarisationsweiche der eingangs genannten Art anzugeben, die mit möglichst geringem Aufwand realisiert ist, dabei aber trotzdem noch gute Werte bezüglich der Polarisationsentkopplung, der Dämpfung und der Frequenzbandentkopplung aufweist.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.
Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass in einem ersten Hohlleiterabschnitt eine parallel zur einen Polarisation ausgerichtete Finleitungsstruktur, versehen mit einer Leitungsverzweigung und frequenzselektiven Elementen, vorhanden ist, womit die Signale der einen Polarisationsrichtung frequenzmässig getrennt und zu zwei Wellenleiterausgängen geführt werden, und dass in einem zweiten Hohlleiterabschnitt eine parallel zur anderen Polarisation ausgerichtete Finleitungsstruktur angeordnet ist, die ebenfalls mit einer Leitungsverzweigung und frequenzselektiven Elementen versehen ist, womit die Signale der anderen Polarisationsrichtung frequenzmässig getrennt und zu zwei weiteren Wellenleiterausgängen geführt werden.This object is achieved according to the invention in that in a first waveguide section there is a fin line structure aligned parallel to a polarization, provided with a line branching and frequency-selective elements, with which the signals of the one polarization direction are separated in terms of frequency and lead to two waveguide outputs, and in one second waveguide section, a fin line structure aligned parallel to the other polarization is arranged, which is also provided with a line branching and frequency-selective elements, with which the signals of the other polarization direction are separated in terms of frequency and routed to two further waveguide outputs.
Zweckmässige Ausführungen der Erfindung gehen aus den Unteransprüchen hervor.Appropriate embodiments of the invention emerge from the subclaims.
Anhand zweier in der Zeichnung dargestellten Ausführungsbeispiele wird anschliessend die Erfindung näher erläutert.The invention is subsequently explained in more detail using two exemplary embodiments shown in the drawing.
Die Fig. 1 und 2 zeigen die Längsschnitte durch zwei Zweiband-Polarisationsweichen, mit unterschiedlichen Finleitungsstrukturen.1 and 2 show the longitudinal sections through two two-band polarization switches, with different fin line structures.
Die in Fig. 1 dargestellte Zweiband-Polarisationsweiche besitzt einen doppelt polarisierbaren Hohlleiterabschnitt HL1 mit z.B. quadratischem oder rundem Querschnitt. In einer Längsschnittebene, die durch die Längsachse des Hohlleiterabschnitts HL1 verläuft, ist eine Finleitungsstruktur F1 angeordnet. Die Finleitungsstruktur kann aus einem elektrisch leitenden Blech ausgelassen oder auf einem dielektrischen Substrat aufmetallisiert sein.The two-band polarization switch shown in Fig. 1 has a double polarizable waveguide section HL1 with e.g. 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.
Diese im Hohlleiterabschnitt HL 1 eingebrachte Finleitungsstruktur F1 soll nur die Signale einer Polarisationsrichtung ankoppeln. Zu dieser Polarisationsrichtung ist daher die Finleitungsstruktur F1 parallel ausgerichtet.This fin line structure F1 introduced in the waveguide section HL 1 is only intended to couple the signals of one polarization direction. The fin line structure F1 is therefore aligned parallel to this polarization direction.
Der Übergang vom Hohlleiterabschnitt HL1 auf den Finleiter FL1 erfolgt durch stetige (oder auch stufenförmige) Aufweitung des Finleiters auf den Hohlleiterdurchmesser. Dieser Finleiter FL1 koppelt die sich im Hohlleiterabschnitt HL1 ausbreitenden Signale zweier Frequenzbänder (z.B. 6 GHz, 4 GHz) an führt sie zu einer Verzweigung V1; von der aus ein Finleiter FL2 zu einem Hohlleiterausgang HA1 und ein mit einer Tiefpassfilterstruktur FF1 versehener Finleiter FL3 abgeht.The transition from Hohlle i terabschnitt HL1 to the Finleiter FL1 is carried out by continuous (or stepwise) widening of the Finle i ters on the waveguide diameter. This fin i ter FL1 couples the signals of two frequency bands (for example 6 GHz, 4 GHz) propagating in the waveguide section HL1 to a branching V1; from which a fin conductor FL2 leads to a waveguide output HA1 and a fin i ter FL3 provided with a low pass filter structure FF1.
Vom Finleiter FL2 wird das Signal des höheren Frequenzbandes (6 GHz) an den mit einem Stufentransformator ST versehenen Hohlleiterausgang, der aufgrund seiner Dimensionierung Hochpasseigenschaften hat, angekoppelt. Der Stufentransformator ST dient einerseits zur Impedanztransformation vom Finleiter FL2 auf den Anschlussquerschnitt QA des Hohlleiterausganges HA1 und erzeugt andererseits eine Verjüngung der Hohlleiterbreitseite, so dass eine verstärkte Hochpasswirkung entsteht.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 is on the one hand for impedance transformation from Finleiter FL2 on the connection cross-section of the QA Hohlle i terausganges HA1 and on the other hand produces a rejuvenation of Hohlleiterbreitse te i, so that an enhanced high-pass effect is created.
Hinter der Tiefpassfilterstruktur FF1 wird aus dem Finleiter FL3 über den Innenleiter IL eines Koaxialleiterausgangens KA1 das Signal des tieferen Frequenzbandes (4 GHz) ausgekoppelt.Behind the low-pass filter structure FF1, 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 KA1.
An den ersten Hohlleiterabschnitt HL1 schliesst sich ein zweiter Hohlleiterabschnitt HL2 an, der entweder genauso wie der erste doppeltpolarisierbar ist oder eine solche Querschnittsform hat, dass sich in ihm nur Signale einer einzigen Polarisation ausbreiten können. Der zweite Hohlleiterabschnitt HL2 ist in gleicher Weise mit einer Finleitungsstruktur F2 wie der erste Hohlleiterabschnitt HL1 ausgestattet. Nur ist die Finleitungsstruktur F2 im Hohlleiterabschnitt HL2 um 90° achsial gegenüber der Finleitungsstruktur F1 im Hohlleiterabschnitt HL1 gedreht, so dass in die Finleitungsstruktur F2 die Signale der anderen Polarisation, welche orthogonal zu der von der Finleitungs- struktur F1 erfassten Polarisation steht, eingekoppelt werden. Für das Signal des höheren Frequenzbandes (6 GHz) ist der Hochpasseigenschaften aufweisende Hohlleiterausgang HA2 und für das Signal des tieferen Frequenzbandes (4 GHz) der Koaxialleiterausgang KA2 bestimmt Beide Signalausgänge HA2 und KA2 haben die gleiche Dimensionierung wie die entsprechenden Signalausgänge HA1 und KA1 des Hohlleiterabschnitts HL1.Terabschnitt to the first Hohlle i HL1, a second waveguide section HL2 adjoins, either the same as the first is doppeltpolarisierbar or such a cross section shape that in it only signals of a single polarization can propagate. 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 Finleitungsstruktur F2 is axially rotated in the waveguide section HL2 by 90 ° relative to the Finleitungsstruktur F1 in the waveguide section HL1, so that in the Finleitungsstruktur F2, the signals of the other polarization which is orthogonal to the information detected by the Finle i tungs- structure F1 polarization, coupled will. The high-pass waveguide output HA2 is intended for the signal of the higher frequency band (6 GHz) and the coaxial conductor output KA2 is intended for the signal of the lower frequency band (4 GHz). Both signal outputs HA2 and KA2 have the same dimensions as the corresponding signal outputs HA1 and KA1 of the waveguide section HL1 .
Das in Fig. 2 dargestellte zweite Ausführungsbeispiel einer Zweiband-Polarisationsweiche gleich dem ersten Ausführungsbeispiel gemäss Fig. 1 bis auf die Art der Frequenzbandtrennung durch die Finleitungsstrukturen F3 und F4 in den Hohlleiterabschnitten HL3 und HL4.The second exemplary embodiment of a two-band polarization 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.
An der Verzweigungsstelle V2 verzweigt sich der beide Frequenzbänder führende Finleiter FL3 in den mit einer Tiefpassstruktur FF2 versehenen Finleiter FL4 und den mit einer Bandpassstruktur FF3 versehenen Finleiter FL5. Der Finleiter FL4 koppelt das Signal des tieferen Frequenzbandes (4 GHz) an den Hohlleiterausgang HA3 und der Finleiter FL5 das Signal des höheren Frequenzbandes (6 GHz) an den Hohlleiterausgang HA4 an. Sämtliche Übergänge von Finleitern auf Hohlleiter erfolgen durch stetige (oder auch stufenförmige) Aufweiterung der Finleiter auf die Durchmesser der Hohlleiter.At the branching point V2, the fin conductor FL3, which carries both frequency bands, branches into the one which is provided with a low-pass structure FF2 Fin conductor FL4 and the fin conductor FL5 provided with a bandpass 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 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.
Die in den zweiten Hohlleiterabschnitt HL4 eingefügte Finleitungsstruktur F4 hat die gleiche Gestalt wie die Finleitungsstruktur F3 im ersten Hohlleiterabschnitt HL3. Sie koppelt das Signal des tieferen Frequenzbandes bzw. des höheren Frequenzbandes an die Hohlleiterausgänge HA5 bzw. HA6 an.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.
Damit die im ersten Hohlleiterabschnitt HL1, HL3 anzukoppelnden, doppelt polarisierten Wellen keine Störwellen im zweiten Hohlleiterabschnitt HL2, HL4 anregen, sollte die Finleitungsstruktur am Ende entsprechend lang gewählt werden. Die Finleitungsstruktur wirkt nämlich wie eine Belastung im Hohlleiter (vergleichbar mit einem Steghohlleiter), wodurch störende höhere Wellentypen gedämpft werden. Eventuell dann noch vorhandene Störwellen werden durch am Ende des zweiten Hohlleiterabschnitts HL2, HL4 angeordnete Absorptionskörper A1, A2 beseitigt.To ensure that the double-polarized waves to be coupled in the first waveguide section HL1, HL3 do not excite interference waves in the second waveguide section HL2, HL4, 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.
Der beschriebene Erfindungsgedanke lässt einige Variationsmöglichkeiten bezüglich der Filterstrukturen zu. Es ist beispielsweise möglich, dass von der Verzweigung V1, V2 zwei Bandpassstrukturen oder auch ein Bandpass und eine Bandsperre abgehen.The inventive concept described allows some possible variations with regard to the filter structures. It is possible, for example, that two bandpass structures or a bandpass and a bandstop come from the branching V1, V2.
Entgegen den oben beschriebenen Ausführungsbeispielen können die Hohlleiterabschnitte HL1, HL2 bzw. HL3, HL4 als Doppel-Steghohlleiter ausgeführt sein. Dazu würde der Übergang Hohlleiter-Finleiter nicht allmählich sondern abrupt erfolgen.Contrary to the exemplary embodiments described above, the waveguide sections HL1, HL2 or HL3, HL4 can be designed as double-ridge waveguides. For this purpose, the waveguide-fin conductor transition would not take place gradually but abruptly.
Claims (7)
- , 1. Dual band polarization filter for four signals and comprising a hollow waveguide equipped with waveguide couplings, with means being provided to effect frequency and polarization separation of the four signals, each of which signals is associated with one of two different frequency bands and one of two different frequency bands and one of two orthogonal polarizations, characterized in that, in a first hollow waveguide section (HL1; HL3) , a fin-type conductor structure (F1; F3) is provided which is oriented parallel to the one polarization and is configured to provide branching signal paths (V1; V2) and includes frequency selective elements (FF1; FF2, FF3) with which the signals of the one polarization direction are separated as to their frequencies and are brougth to two waveguide outputs (HA1, KA1; HA3, HA4); and in a second hollow waveguide section (HL2; HL4) there is provided a fin-type conductor structure (F2; F4) which is oriented parallel to the other polarization and is also configured to provide branching signal paths and includes frequency selective elements with which the signals of the other polarization direction are separated as to their frequencies and are fed to two further waveguide outputs (HA2, KA2; HA5, HA6).
- 2. Dual band polarization filter according to claim 1, characterized in that fields of both polarizations are able to propagate in both hollowwave- guide sections (HL1, HL2; HL3, HL4).
- 3. Dual band polarization filter according to claim 1, characterized in that fields of both polarizations propagate in the first hollow waveguide section (HL1, HL3) which receives all four signals and in the subsequent, second hollow waveguide section (HL2, HL4), only the fields of a single polarization propagate.
- 4. Dual band polarization filter according to claim 1, characterized in that the fin-type conductor structure (F1, F2; F3, F4) is inserted into an electrically conductive metal sheet which is inserted into the hollow waveguide section (HL1, HL2; HL3, HL4).
- 5. Dual band polarization filter according to claim 1, characterized in that the fin-type conductor structure (F1, F2, F3, F4) is metallized onto a dielectric substrate inserted into the hollow waveguide section (HL1, HL2; HL3, HL4).
- 6. Dual band polarization filter according to claim 1, 4 or 5, characterized in that the fin-type conductor structure (F1, F2, F3, F4) lies in a longitudinal sectional plane which passes through the longitudinal axis of the hollow waveguide section (HL1, HL2; HL3, HL4).
- 7. Dual band polarization filter according to claim 1,4 or 5, characterized in that the transitions from fin-type conductors (FL1, FL3; FL4, FL5) to hollow waveguides (HL1, HL3; HA3, HA4) is effected by steadily widening the fin-type conductors to the hollow waveguide diameters.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843406641 DE3406641A1 (en) | 1984-02-24 | 1984-02-24 | TWO-BAND POLARIZING SWITCH |
| DE3406641 | 1984-02-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0154692A1 EP0154692A1 (en) | 1985-09-18 |
| EP0154692B1 true EP0154692B1 (en) | 1988-05-11 |
Family
ID=6228656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84114833A Expired EP0154692B1 (en) | 1984-02-24 | 1984-12-06 | Polarisation-selective circuit for two frequency bands |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4622524A (en) |
| EP (1) | EP0154692B1 (en) |
| CA (1) | CA1227839A (en) |
| DE (2) | DE3406641A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0185446A3 (en) * | 1984-10-12 | 1988-03-30 | British Aerospace Public Limited Company | Transmitter/receiver |
| YU201586A (en) * | 1985-12-06 | 1988-12-31 | Siemens Ag | Assembly for transmitting directed radio relay signals in two or more radio relay frequency bands |
| FR2593644B1 (en) * | 1986-01-28 | 1988-03-11 | Alcatel Espace | POLARIZATION AND FREQUENCY DUPLEXER DEVICE WITH THREE ACCESSES. |
| GB2188493A (en) * | 1986-03-27 | 1987-09-30 | Era Patents Ltd | Orthogonal mode transducer |
| US4737741A (en) * | 1986-10-20 | 1988-04-12 | Hughes Aircraft Company | Orthogonal mode electromagnetic wave launcher |
| DE3840450A1 (en) * | 1988-12-01 | 1990-06-07 | Telefunken Systemtechnik | MODEM COUPLER FOR MONOPULATION APPLICATIONS |
| US5923229A (en) * | 1997-09-12 | 1999-07-13 | Wytec, Inc. | Simultaneous polarization and frequency filtering of transmitter and receiver signals in single antenna systems |
| WO2001065642A2 (en) * | 2000-03-01 | 2001-09-07 | Prodelin Corporation | Multibeam antenna for establishing individual communication links with satellites positioned in close angular proximity to each other |
| 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 (en) * | 2005-02-04 | 2011-11-15 | James Plant | Polarization filter utilizing brewster's angle |
| US7808427B1 (en) | 2009-05-28 | 2010-10-05 | Raytheon Company | Radar system having dual band polarization versatile active electronically scanned lens array |
| JP5806098B2 (en) * | 2010-12-20 | 2015-11-10 | 日本電信電話株式会社 | Fin-line polarization separator |
| DE102013011651A1 (en) * | 2013-07-11 | 2015-01-15 | ESA-microwave service GmbH | Antenna feed system in the microwave range for reflector antennas |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2923901A (en) * | 1941-07-25 | 1960-02-02 | robertson | |
| US2921272A (en) * | 1941-07-25 | 1960-01-12 | Bell Telephone Labor Inc | Finline coupler |
| 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 |
| JPS583401B2 (en) * | 1972-05-23 | 1983-01-21 | 日本放送協会 | micro halo |
| DE2443166C3 (en) * | 1974-09-10 | 1985-05-30 | ANT Nachrichtentechnik GmbH, 7150 Backnang | System switch for separating two signals, each consisting of two double polarized frequency bands |
| DE2517383C3 (en) * | 1975-04-19 | 1979-03-01 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | System crossover for dual use of frequencies |
| DE2925827B2 (en) * | 1979-06-27 | 1981-07-09 | Siemens AG, 1000 Berlin und 8000 München | Microwave and millimeter wave mixers |
| US4467294A (en) * | 1981-12-17 | 1984-08-21 | Vitalink Communications Corporation | Waveguide apparatus and method for dual polarized and dual frequency signals |
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1984
- 1984-02-24 DE DE19843406641 patent/DE3406641A1/en not_active Withdrawn
- 1984-12-06 DE DE8484114833T patent/DE3471206D1/en not_active Expired
- 1984-12-06 EP EP84114833A patent/EP0154692B1/en not_active Expired
-
1985
- 1985-02-22 US US06/704,097 patent/US4622524A/en not_active Expired - Fee Related
- 1985-02-22 CA CA000474918A patent/CA1227839A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3406641A1 (en) | 1985-08-29 |
| US4622524A (en) | 1986-11-11 |
| EP0154692A1 (en) | 1985-09-18 |
| CA1227839A (en) | 1987-10-06 |
| DE3471206D1 (en) | 1988-06-16 |
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