EP0693229A1 - Wageguide multiplexer/demultiplexer - Google Patents

Wageguide multiplexer/demultiplexer

Info

Publication number
EP0693229A1
EP0693229A1 EP94910348A EP94910348A EP0693229A1 EP 0693229 A1 EP0693229 A1 EP 0693229A1 EP 94910348 A EP94910348 A EP 94910348A EP 94910348 A EP94910348 A EP 94910348A EP 0693229 A1 EP0693229 A1 EP 0693229A1
Authority
EP
European Patent Office
Prior art keywords
waveguide
coupling
multiplexer
collecting
demultiplexer
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
Application number
EP94910348A
Other languages
German (de)
French (fr)
Other versions
EP0693229B1 (en
Inventor
Stilianos Tokouzbalidis
Uwe Rosenberg
Werner Speldrich
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.)
Robert Bosch GmbH
Original Assignee
ANT Nachrichtentechnik GmbH
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 ANT Nachrichtentechnik GmbH filed Critical ANT Nachrichtentechnik GmbH
Publication of EP0693229A1 publication Critical patent/EP0693229A1/en
Application granted granted Critical
Publication of EP0693229B1 publication Critical patent/EP0693229B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01P1/2138—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using hollow waveguide filters

Definitions

  • the invention is based on a waveguide multiplexer / demultiplexer, according to the preamble of patent claim 1
  • Such a waveguide multiplexer / demultiplexer is known from PCT application WO 88/03711.
  • two waveguide filters are coupled to the collecting waveguide in the same cross-sectional plane, one waveguide filter each on one of two opposite side walls.
  • the coupling takes place via pins which protrude on the one hand into the collecting waveguide and on the other hand into the waveguide filter through their side walls.
  • the same script also reveals one
  • Waveguide multiplexer / demultiplexer in which waveguide filters are coupled on the end face via slots in two opposite side walls of a collecting waveguide.
  • the waveguide filters are coupled alternately along the busbar to the opposite side walls, so that in a cross-sectional plane of the busbar there is at most a coupling opening for a waveguide filter.
  • This known type of coupling of waveguide filters to a collecting waveguide entails an extremely large overall length of the multiplexer / demultiplexer, especially if it is to be designed for a large number (for example 12) frequency channels. Since such waveguide multiplexers / demultiplexers are used in the space sector, it is disadvantageous if their designs are very voluminous.
  • the invention is therefore based on the object of specifying a waveguide multiplexer / demultiplexer of the type mentioned at the outset, which has the smallest possible volume and weight.
  • the only figure in the drawing shows a 12-channel waveguide multiplexer / demultiplexer. It has a rectangular collecting waveguide SH, which is provided with a short circuit KE at one end.
  • these have the shape of slots, for example, which enable very broadband coupling.
  • Two coupling openings K1 and K4, K2 and K5, K3 and K6 are arranged side by side in both side walls S1 and S2 of the collecting waveguide SH in the direction transverse to the longitudinal axis of the collecting waveguide.
  • the two coupling openings are offset from the center of the side wall S1, S2 towards the edges thereof, so that it is possible to couple waveguide filters next to one another via the two coupling openings to the busbar SH.
  • several such coupling opening pairs K1, K4 and K2, K5 and K3, K6 are arranged along the busbar SH, coupling pairs of openings in both side walls S1 and S2 can also be directly opposite one another.
  • Each coupling opening K1, K2, K3, K4, K5, K6 ... is placed in such a way that its center distance from the short circuit plane KE of the collecting waveguide SH corresponds approximately to an odd multiple of a quarter of the mean wavelength of the frequency channel to be coupled via it.
  • the coupling openings are expediently assigned to the frequency channels such that locally closely adjacent coupling openings, such as the coupling openings K1, K4 or K2, K5 or K3, K6 lying next to one another transversely to the longitudinal axis of the waveguide, are not for the coupling of directly adjacent frequency channels are provided.
  • the designation of the coupling openings Kl ... K6 in the drawing makes it clear that coupling openings lying closely next to one another are as large as possible
  • Each coupling opening Kl, K2, K3, K4 K5, K6 ... is surrounded by a flange Fl ... F12. Because of the space-saving arrangement of the coupling opening, the flanges partially protrude beyond the edges of the collecting waveguide SH. In order to give all flanges sufficient stability, webs ST and spacers AH are provided between adjacent flanges.
  • One or more further filters can also be coupled directly in the short-circuit plane KE by providing coupling diaphragms in the short-circuit wall, which have a parallel orientation to the magnetic field component of the basic wave type of the collection waveguide SH.

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

A space and weight-saving waveguide multiplexer/demultiplexer has a short-circuited rectangular waveguide manifold (SH) at one end. In at least one side wall (S1, S2) of the manifold there is at least one pair of coupling apertures (K1, K4; K2, K5; K3, K6) juxtaposed transversely to the axis of the manifold (SH), in which each coupling aperture is at a distance from the short-circuit plane (KE) of the manifold (SH) corresponding to an odd multiple of a quarter of the mean wavelength of the frequency channel to be coupled via the appropriate coupling aperture. The two coupling apertures (K1, K4; K2, K5; K3, K6) are staggered from the centre of the side wall (S1) towards their edges to such an extent that a waveguide filter can be coupled to the manifold (SH) via each coupling aperture (K1, ..., K6).

Description

Beschreibungdescription
Hohlleitermultiplexer/ -demultiplexerWaveguide multiplexer / demultiplexer
Die Erfindung geht aus von einem Hohlleitermultiplexer/ -demultiplexer, nach dem Oberbegriff des Patentanspruchs 1The invention is based on a waveguide multiplexer / demultiplexer, according to the preamble of patent claim 1
Ein solcher Hohlleitermultiplexer/ -demultiplexer ist aus der PCT Anmeldung WO 88/03711 bekannt. Hier sind jeweils zwei Hohleiterfilter in derselben Querschnittsebene an den Sammelhohlleiter angekoppelt und zwar jeweils ein Hohlleiterfilter an einer von zwei einander gegenüberliegenden Seitenwänden. Die Kopplung erfolgt über Stifte, die einerseits in den Sammelhohlleiter und anderseits in die Hohlleiterfilter durch deren Seitenwände hineinragen. Dieselbe Schrift offenbart auch einenSuch a waveguide multiplexer / demultiplexer is known from PCT application WO 88/03711. Here, two waveguide filters are coupled to the collecting waveguide in the same cross-sectional plane, one waveguide filter each on one of two opposite side walls. The coupling takes place via pins which protrude on the one hand into the collecting waveguide and on the other hand into the waveguide filter through their side walls. The same script also reveals one
Hohlleitermultiplexer/ -demultiplexer, bei dem über Schlitze in zwei einander gegenüberliegenden Seitenwänden eines Sammelhohlleiters Hohlleiterfilter stirnseitig angekoppelt sind. Die Hohlleiterfilter sind entlang dem Sammelleiter alternierend an den gegenüberliegenden Seitenwänden angekoppelt, so daß in einer Querschnittsebene des Sammelleiters allenfalls eine Koppelöffnung für ein Hohlleiterfilter vorhanden ist.Waveguide multiplexer / demultiplexer, in which waveguide filters are coupled on the end face via slots in two opposite side walls of a collecting waveguide. The waveguide filters are coupled alternately along the busbar to the opposite side walls, so that in a cross-sectional plane of the busbar there is at most a coupling opening for a waveguide filter.
Diese bekannte Art der Ankopplung von Hohlleiterfiltern an einen Sammelhohlleiter bringt eine extrem große Baulänge des Multiplexers / Demultiplexers mit sich, vor allem wenn er für sehr viele (z.B. 12) Frequenzkanäle ausgelegt sein soll. Da solche Hohlleitermultiplexer/ -demultiplexer im Raumfahrtbereich eingesetzt werden, ist es von Nachteil, wenn deren Bauformen sehr voluminös sind. Der Erfindung liegt daher die Aufgabe zugrunde, einen Hohlleitermultiplexer/ -demultiplexer der eingangs genannten Art anzugeben, der ein möglichst kleines Volumen und Gewicht hat.This known type of coupling of waveguide filters to a collecting waveguide entails an extremely large overall length of the multiplexer / demultiplexer, especially if it is to be designed for a large number (for example 12) frequency channels. Since such waveguide multiplexers / demultiplexers are used in the space sector, it is disadvantageous if their designs are very voluminous. The invention is therefore based on the object of specifying a waveguide multiplexer / demultiplexer of the type mentioned at the outset, which has the smallest possible volume and weight.
Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Zweckmäßige Weiterbildungen der Erfindung gehen aus den Unteransprüchen hervor. Bei einem nach der Erfindung ausgeführten Hohlleitermultiplexer/ - demultiplexer wird der Platz für die Ankopplung derAccording to the invention, this object is achieved by the features of claim 1. Appropriate developments of the invention emerge from the subclaims. In the case of a waveguide multiplexer / demultiplexer designed according to the invention, the space for the coupling of the
Hohlleiterfilter an dem Sammelhohlleiter optimal ausgenutzt. Dadurch verkürzt sich die Anordnung in ihrer Gesamtlänge erheblich gegenüber dem Stand der Technik. Als Folge davon verringert sich auch das Gewicht der Anordnung.Optimally used waveguide filter on the collecting waveguide. This shortens the overall length of the arrangement considerably compared to the prior art. As a result, the weight of the assembly also decreases.
Anhand eines in der Zeichnung dargestellten Ausführungsbeispiels wird nun die Erfindung näher erläutert.The invention will now be explained in more detail with reference to an embodiment shown in the drawing.
Die einzige Figur der Zeichnung zeigt einen 12-kanaligen Hohlleitermultiplexer/ -demultiplexer. Er weist einen rechteckförmigen Sammelhohlleiter SH auf, der an einem Ende mit einem Kurzschluß KE versehen ist. Zur Ankopplung von in der Zeichnung nicht dargestellten Hohlleiterfiltern, von denen jedes auf einen der 12 Frequenzkanäle abgestimmt ist, sind in zwei einander gegenüberliegenden Seitenwänden Sl und S2 des Sammelhohlleiters Koppelöffnungen Kl, K2, K3, K4, K5, K6... eingelassen. Diese haben in dem dargestellten Ausführungsbeispiel z.B. die Form von Schlitzen, die eine sehr breitbandige Ankopplung ermöglichen. In beiden Seitenwänden Sl und S2 des Sammelhohlleiters SH sind jeweils zwei Koppelöffnungen Kl und K4, K2 und K5, K3 und K6 in Richtung quer zur Längsachse des Sammelhohlleiters nebeneinander angeordnet. Und zwar sind die beiden Koppelöffnungen aus der Mitte der Seitenwand Sl, S2 heraus zu deren Rändern hin versetzt, so daß es möglich ist, Hohlleiterfilter nebeneinander über die zwei Koppelöffnungen an den Sammelleiter SH anzukoppeln. Wie die Figur zeigt, sind mehrere solcher Koppelöffnungspaare Kl, K4 und K2, K5 und K3 , K6 entlang dem Sammelleiter SH angeordnet, wobei sich KoppelÖffnungspaare in beiden Seitenwänden Sl und S2 auch direkt gegenüberliegen können. Jede Koppelöffnung Kl, K2, K3, K4, K5, K6... ist so plaziert, daß ihr Mittenabstand von der Kurzschlußebene KE des Sammelhohlleiters SH etwa einem ungeradzahligen Vielfachen eines Viertels der mittleren Wellenlänge des über sie anzukoppelnden Frequenzkanals entspricht.The only figure in the drawing shows a 12-channel waveguide multiplexer / demultiplexer. It has a rectangular collecting waveguide SH, which is provided with a short circuit KE at one end. To couple waveguide filters, not shown in the drawing, each of which is tuned to one of the 12 frequency channels, coupling openings K1, K2, K3, K4, K5, K6 ... are let into two opposite side walls S1 and S2 of the collecting waveguide. In the exemplary embodiment shown, these have the shape of slots, for example, which enable very broadband coupling. Two coupling openings K1 and K4, K2 and K5, K3 and K6 are arranged side by side in both side walls S1 and S2 of the collecting waveguide SH in the direction transverse to the longitudinal axis of the collecting waveguide. In fact, the two coupling openings are offset from the center of the side wall S1, S2 towards the edges thereof, so that it is possible to couple waveguide filters next to one another via the two coupling openings to the busbar SH. As the figure shows, several such coupling opening pairs K1, K4 and K2, K5 and K3, K6 are arranged along the busbar SH, coupling pairs of openings in both side walls S1 and S2 can also be directly opposite one another. Each coupling opening K1, K2, K3, K4, K5, K6 ... is placed in such a way that its center distance from the short circuit plane KE of the collecting waveguide SH corresponds approximately to an odd multiple of a quarter of the mean wavelength of the frequency channel to be coupled via it.
Damit Verkopplungen zwischen den einzelnen Frequenzkanälen möglichst weitgehend ausgeschlossen werden, sind die Koppelöffnungen den Frequenzkanälen zweckmäßigerweise so zugeordnet, daß örtlich eng benachbarte Koppelöfnungen, wie die quer zur Hohlleiterlängsachse nebeneinander liegenden Koppelöffnungen Kl, K4 oder K2, K5 oder K3, K6, nicht für die Ankopplung von direkt benachbarten Frequenzkanälen vorgesehen sind. Die Benennung der Koppelöffnungen Kl ... K6 in der Zeichnung verdeutlicht, daß dicht nebeneinander liegende Koppelöffnungen einen möglichst großenSo that couplings between the individual frequency channels are excluded as far as possible, the coupling openings are expediently assigned to the frequency channels such that locally closely adjacent coupling openings, such as the coupling openings K1, K4 or K2, K5 or K3, K6 lying next to one another transversely to the longitudinal axis of the waveguide, are not for the coupling of directly adjacent frequency channels are provided. The designation of the coupling openings Kl ... K6 in the drawing makes it clear that coupling openings lying closely next to one another are as large as possible
Frequenzkanalabstand haben (die aneinandergereihten Frequenzkanäle sind fortlaufend mit 1 ... 12 durchnumeriert) Jede Koppelöffnung Kl, K2, K3, K4 K5, K6... ist von einem Flansch Fl ... F12 umgeben. Wegen der raumsparenden Anordnung der Koppelöffnung stehen die Flansche teilweise über die Ränder des Sammelhohlleiters SH hinaus. Um allen Flanschen eine ausreichende Stabilität zu verleihen, sind Stege ST und Abstandhalter AH zwischen benachbarten Flanschen vorgesehen.Frequency channel spacing (the frequency channels are consecutively numbered 1 ... 12) Each coupling opening Kl, K2, K3, K4 K5, K6 ... is surrounded by a flange Fl ... F12. Because of the space-saving arrangement of the coupling opening, the flanges partially protrude beyond the edges of the collecting waveguide SH. In order to give all flanges sufficient stability, webs ST and spacers AH are provided between adjacent flanges.
Ein oder mehrere weitere Filter können auch direkt in der Kurzschlußebene KE angekoppelt werden, indem in der Kurzschlußwand Koppelblenden vorgesehen werden, die eine parallele Orientierung zur magnetischen Feldkomponente des Grundwellentyps des Sammelhohlleiters SH aufweisen. One or more further filters can also be coupled directly in the short-circuit plane KE by providing coupling diaphragms in the short-circuit wall, which have a parallel orientation to the magnetic field component of the basic wave type of the collection waveguide SH.

Claims

Patentansprüche Claims
1. Hohlleitermultiplexer/ -demultiplexer, welcher einen an einem Ende kurzgeschlossen rechteckförmigen Sammelhohlleiter aufweist, mit dem an mindestens einer seiner Seitenwände mehrere auf verschiedene Frequenzkanäle abgestimmte Hohlleiterfilter koppelbar sind, dadurch gekennzeichnet, daß in der Seitenwand (Sl, S2) mindestens ein Paar1. waveguide multiplexer / demultiplexer, which has a short-circuited rectangular waveguide at one end, with which several waveguide filters matched to different frequency channels can be coupled on at least one of its side walls, characterized in that in the side wall (S1, S2) at least one pair
Koppelöffnungen (Kl, K4; K2, K5; K3, K6) vorhanden ist, die in Richtung quer zur Längsachse des Sammelhohlleiters (SH) nebeneinander angeordnet sind, daß jede Koppelöffnung von der Kurzschlußebene (KE) des Sammelhohlleiters (SH) einen Abstand hat, der einem ungeradzahligen Vielfachen einesThere are coupling openings (K1, K4; K2, K5; K3, K6) which are arranged next to one another in the direction transverse to the longitudinal axis of the collecting waveguide (SH) such that each coupling opening is at a distance from the short circuit plane (KE) of the collecting waveguide (SH). of an odd multiple of one
Viertels der mittleren Wellenlänge des über die jeweilige Koppelöffnung anzukoppelnden Frequenzkanals entspricht und daß die beiden Koppelöffnungen (Kl, K4; K2, K5; K3, K6) soweit aus der Mitte der Seitenwand (Sl) heraus zu deren Rändern hin versetzt angeordnet sind, daß über jede Koppelöffnung (K1...K6) ein Hohlleiterfilter an den Sammelhohlleiter (SH) ankoppelbar ist.Corresponds to a quarter of the mean wavelength of the frequency channel to be coupled via the respective coupling opening and that the two coupling openings (Kl, K4; K2, K5; K3, K6) are arranged so far from the center of the side wall (Sl) to their edges that over each coupling opening (K1 ... K6) a waveguide filter can be coupled to the collecting waveguide (SH).
2. Hohlleitermultiplexer/ -demultiplexer nach Anspruch l, dadurch gekennzeichnet, daß in zwei einander gegenüberliegenden Seitenwänden (Sl, S2) des Sammelhohlleiters (SH) jeweils mindestens ein Paar Koppelöffnungen (Kl, K4; K2, K5; K3, K6) vorhanden ist.2. waveguide multiplexer / demultiplexer according to claim l, characterized in that in two opposite side walls (Sl, S2) of the collecting waveguide (SH) each have at least one pair of coupling openings (Kl, K4; K2, K5; K3, K6).
3. Hohlleitermultiplexer/ -demultiplexer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß diejenigen Koppelöffnungen (Kl, K4; K2, K5; K3, K6) welche in Richtung quer zur Längsachse des Sammelhohlleiters (SH) nebeneinander angeordnet sind, für die Ankopplung nicht direkt benachbarter Frequenzkanäle vorgesehen sind. 3. waveguide multiplexer / demultiplexer according to claim 1 or 2, characterized in that those coupling openings (Kl, K4; K2, K5; K3, K6) which are arranged next to one another in the direction transverse to the longitudinal axis of the collecting waveguide (SH), for the coupling not directly adjacent frequency channels are provided.
EP94910348A 1993-04-10 1994-03-18 Wageguide multiplexer/demultiplexer Expired - Lifetime EP0693229B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4311853 1993-04-10
DE4311853 1993-04-10
PCT/DE1994/000302 WO1994024721A1 (en) 1993-04-10 1994-03-18 Wageguide multiplexer/demultiplexer

Publications (2)

Publication Number Publication Date
EP0693229A1 true EP0693229A1 (en) 1996-01-24
EP0693229B1 EP0693229B1 (en) 1997-06-11

Family

ID=6485240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94910348A Expired - Lifetime EP0693229B1 (en) 1993-04-10 1994-03-18 Wageguide multiplexer/demultiplexer

Country Status (5)

Country Link
US (1) US5578973A (en)
EP (1) EP0693229B1 (en)
CA (1) CA2160142C (en)
DE (2) DE4340123C2 (en)
WO (1) WO1994024721A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19609566C1 (en) * 1996-03-13 1997-08-21 Bosch Gmbh Robert Frequency diplexer especially for two closely adjacent frequency bands

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2795763A (en) * 1951-05-03 1957-06-11 Bell Telephone Labor Inc Microwave filters
GB1053071A (en) * 1962-04-30
US3731235A (en) * 1971-11-03 1973-05-01 Gte Sylvania Inc Dual polarized diplexer
JPS5521489B2 (en) * 1972-10-05 1980-06-10
FR2259450B1 (en) * 1974-01-25 1979-07-06 Cit Alcatel
US4060778A (en) * 1976-07-12 1977-11-29 Microwave Research Corporation Microwave harmonic absorption filter
US4614920A (en) * 1984-05-28 1986-09-30 Com Dev Ltd. Waveguide manifold coupled multiplexer with triple mode filters
US4780693A (en) * 1986-11-12 1988-10-25 Hughes Aircraft Company Probe coupled waveguide multiplexer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9424721A1 *

Also Published As

Publication number Publication date
US5578973A (en) 1996-11-26
WO1994024721A1 (en) 1994-10-27
DE59403125D1 (en) 1997-07-17
EP0693229B1 (en) 1997-06-11
CA2160142A1 (en) 1994-10-27
DE4340123C2 (en) 1995-07-13
CA2160142C (en) 1999-09-14
DE4340123A1 (en) 1994-10-13

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