EP1233470A1 - Einspeisungsanordnung für eine Mikrowellen-Filtereinheit mit dielektrischen Resonatoren und Filtereinheit mit einer solchen Anordnung - Google Patents

Einspeisungsanordnung für eine Mikrowellen-Filtereinheit mit dielektrischen Resonatoren und Filtereinheit mit einer solchen Anordnung Download PDF

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Publication number
EP1233470A1
EP1233470A1 EP01403371A EP01403371A EP1233470A1 EP 1233470 A1 EP1233470 A1 EP 1233470A1 EP 01403371 A EP01403371 A EP 01403371A EP 01403371 A EP01403371 A EP 01403371A EP 1233470 A1 EP1233470 A1 EP 1233470A1
Authority
EP
European Patent Office
Prior art keywords
cavity
resonator
dielectric
probe
filter
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
EP01403371A
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English (en)
French (fr)
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EP1233470B1 (de
Inventor
Yannick Latouche
Serge Vigneron
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
Original Assignee
Alcatel CIT SA
Alcatel SA
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Publication of EP1233470A1 publication Critical patent/EP1233470A1/de
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Publication of EP1233470B1 publication Critical patent/EP1233470B1/de
Anticipated expiration legal-status Critical
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    • 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
    • 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
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
    • H01P1/2084—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators
    • H01P1/2086—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure with dielectric resonators multimode

Definitions

  • the invention relates to an injection device for a filter unit. microwave with dielectric resonators, in particular in the case where this unit filter has channel filters which are assembled at their outputs by a common waveguide or manifold, for multiplexing purposes. It also relates to filtering units, such as that mentioned above, in which of the injection devices according to the invention are incorporated.
  • such filtering units are more particularly implemented in the context of radio telecommunications systems and in particular in equipment intended to be placed on board satellites space.
  • FIG. 1 A known solution for injecting energy into a filtering unit multipole microwave is shown schematically in Figure 1 where a unit, of the output multiplexer type, commonly designated by the acronym OMUX.
  • This unit has two input channel filters, these two channel filters having their multiplexed outputs.
  • Each channel filter has two resonant cavities 1A, 1B or 1'A, 1'B whose modes are coupled via coupling iris.
  • the cavities have walls made of conductive material, they generally have cylindrical or rectangular shapes.
  • Each channel filter receives a signal which is transmitted to it by a cable coaxial, such as cable 2.
  • This cable connects to an input connector, such as 3 or 3 ', through which the transmitted signal is injected into a first, such 1A, cavities of the channel filter comprising this connector.
  • the signal received by a channel filter is filtered at the two cavities of this channel filter which are here supposed to be fitted with appropriate resonator elements, not shown, which will be reported later.
  • the signal filtered at a filter channel is transmitted from the second of the cavities, such as 5B, from this channel filter to a common waveguide 5 which constitutes the output element of the filtering unit and at level at which the output signals of the channel filters are multiplexed.
  • Each filter channel to the second of its cavities connected to the waveguide 5 by an element of output waveguide, such as cavities 1B or 1B 'by elements 6 or 6'.
  • This guide element is here assumed to be axially disposed along the longitudinal axis of the alignment formed by the cavities of the channel filter, such as the axis XX 'for the channel filter 1.
  • the positioning of the output waveguide elements 6 or 6 'and 3 and 3' input connectors of such a filter unit depends the number of poles in this unit.
  • a European patent application EP-A-6961338 describes a unit for dielectric resonator bandpass filtering which is illustrated in FIG. 2 and which has axially arranged input and output connectors 7 for coaxial cable along the longitudinal axis YY 'of the alignment formed by the cavities of the filter unit.
  • These cavities with a rectangular parallelepiped shape, are formed inside a metal housing 8 and each contain a dielectric resonator having here in the form of a thick disc, like the resonator 9.
  • Each disc is arranged parallel to the bottom of the housing in a cavity and two neighboring cavities communicate with each other through a window in the wall which separates them, such as window 10 in the wall 11.
  • the injection and extraction of microwave signals are effected via the two connectors 7 which are respectively mounted each in one of the two walls which close the unit of filtering at its ends, each of these connectors allowing either injection or extracting a signal at a cavity of the filter unit in which it resulting.
  • Injection takes place via a magnetic coupling loop 12, connecting the conductive core of the coaxial injection connector to the ground at which the box is itself connected.
  • the use of such a coupling loop magnetic has an industrial disadvantage which is due to the fact that its implementation is delicate and cannot easily be reproduced within the framework of a mass production. Furthermore, it only relates to filtering units with cavities singlemode.
  • the invention therefore proposes an injection device for a channel filter of a microwave filtering unit comprising a plurality of channel filters provided with communicating dual mode cavities.
  • Each channel filter includes a cavity, called filter input, at which is received a signal to be processed transmitted by a coaxial cable via a connector mounted crosswise in a wall closing said inlet cavity at an inlet end of the filter.
  • the injection device acts electrically on a resonator dielectric element housed in the inlet cavity, by means of a probe constituted by a rod, L-shaped, having a first part connected to the core of the coaxial cable which it extends into the cavity and a second part used to act by coupling electric on said dielectric resonator element.
  • the probe acts on a resonator dielectric element, plane, perpendicular to a central axis of the cavity inlet where it is housed, this axis being coincident with the longitudinal axis of the channel filter which includes this inlet cavity.
  • the L-shaped rod of the probe has a first part oriented perpendicular to the plane defined by said dielectric element resonator and according to which this element is electrically excitable, as well as a second part oriented parallel to the plane defined by this dielectric element resonator, close to it in the input cavity which houses them.
  • the second part of the probe rod is radially arranged relative to the central axis of the entry cavity where it is housed, in a direction which corresponds to that according to which is electrically excitable the dielectric resonator element, near which it is located in this entry cavity.
  • the invention also provides a microwave filtering unit comprising a channel filter injection device, this unit and this device being such that defined above.
  • the filtering unit is capable of comprising at least one injection device having a probe, the second part of which is arranged in a diagonal of a close planar resonator dielectric element which has at least roughly the shape of a parallelogram whose vertices are short-circuited, at least microwave, through the conductive wall of the cavity channel filter input where this probe and this resonator element are housed.
  • FIG. 1 corresponds to a known filtering unit which is of the type output multiplexer and which has two channel filters.
  • FIG. 2 shows a filtering unit with dielectric resonators, known.
  • Figure 3 shows a cross-sectional view relating to an example of injection device for filtering unit according to the invention.
  • Figure 4 shows a partial section relating to an example of a filtering with dielectric resonators, according to the invention, which is of the multiplexer type outlet and one of the channel filters of which is partially shown in section.
  • the filtering unit of the output multiplexer type, presented by way of example non-limiting, in FIG. 4, comprises two channel filters 1 "and 1 '' 'each having resonant cavities, supposed to be dual-mode, such as 1C “, 1D” or 1C '' ', 1D' ''.
  • These cavities made of a conductive material, have a cylindrical or parallelepiped shape rectangle. They are assumed to be aligned along a common axis, such as the X "X" axis. for cavities 1C '' ', 1D' '' of channel filter 1 '' '.
  • Each of the cavities represented is supposed to contain a dielectric resonator, such as that which is referenced 13 of cavities 1 '' 'C in Figures 3 and 4.
  • This dielectric resonator is for example of a type as described in the French patent 2,734,804.
  • a planar resonator dielectric element 13 is illustrated in FIG. 3, it has roughly the shape of a parallelogram whose four vertices are short-circuited, at least hyperfrequency, between them by the conductive wall 14 of the cavity in which it is located.
  • a resonator is composed of two planar resonator elements, as mentioned above, which are parallel arranged close to each other, in the middle zone of the same cavity, transversely to the central axis of this cavity.
  • the X axis "X" 'of the channel filter 1' '' corresponds to such an axis for the cavity 1 '' 'C.
  • Each channel filter has a first cavity, called an inlet, at the level at which a microwave signal is received which is transmitted by cable coaxial, not shown in Figures 3 and 4.
  • This coaxial cable terminates known per se to a connector mounted crosswise in the wall which closes the first cavity at the inlet end of the filter, this connector being referenced 15 "or 15 "'for 1" and 1 "channel filters.
  • the signal received at an input cavity is filtered as it passes through the cavities of the channel filter. These are preferably aligned and they communicate with each other in a known way, as shown schematically by an iris 16 between the cavities 1 '' 'C and 1' '' E of the channel filter 1 '' 'in Figure 4.
  • microwave signal injection is provided by electrical coupling in the inlet cavities of the channel filters.
  • these inlet cavities are equipped with injection probes respectively associated each to a connector, such as probe 16 to connector 15 "'in Figure 4.
  • Each probe is positioned so as to excite the resonator housed in the cavity into which it enters, i.e. the resonator 13 located in the cavity 1 '' 'C in the case of probe 16, presented in FIGS. 3 and 4.
  • a probe such as 16, is constituted by a rod, at least approximately in L, of which a first part is connected, directly or indirectly, to the core of a coaxial cable which it extends in the cavity to which this cable is connected by a connector, such as the connector 15 "'for the 1"' inlet cavity.
  • the second part of the L formed by a probe 16 is used to act by electrical coupling on the dielectric resonator element with which it is positioned in the cavity which houses them both.
  • the resonator housed in an input cavity has an element planar resonator dielectric sensitive to an electric excitation field E, such that shown schematically in Figure 3, it is preferably provided that the probe 16 is constituted by an L-shaped rod, the first part of which is oriented perpendicular to this field and plan of the resonator. The second part of the probe L is then oriented parallel to the field and therefore to the resonator plane.
  • the first part of a probe rod 16 is intended to be connected either directly to the end of the core of the coaxial cable which transmits the signal to be processed, either at one end of a part of the connector, such as 15 "'where leads this cable core.
  • this connection is made, in a manner known to those skilled in the art, to so that the first part of probe rod 16 is oriented perpendicular to the plane of the resonator element, when the injection device that has it is in place.
  • an injection device probe has a second part perpendicularly oriented with respect to the first so as to extend parallel to the plane direction of the planar dielectric element (s) such as than considered above.
  • the orientation of the second part of a probe conditions the orientation of the electric field to which the resonator is subjected to from which this second part extends.
  • the orientation of the second probe part is, for example, radially arranged relative to the axis of this cavity.
  • the importance of the coupling achieved depends on the length chosen for the second part of the probe, which allows precise selection of the desired coupling at a given entry cavity.
  • the length of the probe or more precisely the length of the first part is chosen according to the desired bandwidth, this band being the larger the longer the probe. This facilitates the realization of filtering similarly constructed and having bandwidth values different.
  • the injection device according to the invention is of course applicable to filter units with a number of poles other than four. He is more particularly advantageous for four or five pole filter units having channel filters whose outputs are multiplexed to the extent that it allows obtain a significant reduction in the overall dimensions of the filter unit by plus the advantages mentioned above concerning the injection device itself.

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EP01403371A 2001-02-15 2001-12-27 Einspeisungsanordnung für eine Mikrowellen-Filtereinheit mit dielektrischen Resonatoren und Filtereinheit mit einer solchen Anordnung Expired - Lifetime EP1233470B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0102076 2001-02-15
FR0102076A FR2820884B1 (fr) 2001-02-15 2001-02-15 Dispositif d'injection pour unite de filtrage hyperfrequence a resonateurs dielectriques et unite de filtrage incluant un tel dispositif

Publications (2)

Publication Number Publication Date
EP1233470A1 true EP1233470A1 (de) 2002-08-21
EP1233470B1 EP1233470B1 (de) 2009-03-25

Family

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Application Number Title Priority Date Filing Date
EP01403371A Expired - Lifetime EP1233470B1 (de) 2001-02-15 2001-12-27 Einspeisungsanordnung für eine Mikrowellen-Filtereinheit mit dielektrischen Resonatoren und Filtereinheit mit einer solchen Anordnung

Country Status (6)

Country Link
US (1) US6617944B2 (de)
EP (1) EP1233470B1 (de)
AT (1) ATE426925T1 (de)
DE (1) DE60138087D1 (de)
ES (1) ES2323405T3 (de)
FR (1) FR2820884B1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2860926B1 (fr) * 2003-10-14 2006-01-27 Cit Alcatel Dispositif de filtrage de signaux en bande k, a resonateur dielectrique a materiau non compense en temperature
US7401483B2 (en) * 2005-03-30 2008-07-22 Strattec Security Corporation Residual magnetic devices and methods for an ignition actuation blockage device
US7397325B2 (en) * 2006-02-10 2008-07-08 Com Dev International Ltd. Enhanced microwave multiplexing network
US7864001B2 (en) * 2006-04-14 2011-01-04 Spx Corporation Manifold combiner for multi-station broadcast sites apparatus and method
CN101533940B (zh) * 2009-03-25 2013-04-24 中国航天科技集团公司第五研究院第五〇四研究所 公共腔体输入多工器
CN103779637B (zh) * 2014-01-26 2016-08-17 成都赛纳赛德科技有限公司 多工器组
CN111916878B (zh) * 2020-08-12 2024-02-20 电子科技大学 一种微波谐振腔耦合环强耦合装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3706965A1 (de) * 1986-03-04 1987-09-10 Murata Manufacturing Co Doppel-modenfilter
EP0615303A1 (de) * 1993-03-12 1994-09-14 Matra Marconi Space Uk Limited Demultiplexer mit dielektrischem Resonator
EP0742603A1 (de) * 1995-05-12 1996-11-13 Alcatel N.V. Dielektrischer Resonator für Mikrowellenfilter und Filter damit
US5804534A (en) * 1996-04-19 1998-09-08 University Of Maryland High performance dual mode microwave filter with cavity and conducting or superconducting loading element

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614920A (en) * 1984-05-28 1986-09-30 Com Dev Ltd. Waveguide manifold coupled multiplexer with triple mode filters
US4721933A (en) * 1986-09-02 1988-01-26 Hughes Aircraft Company Dual mode waveguide filter employing coupling element for asymmetric response
US5184098A (en) * 1992-02-10 1993-02-02 Hughes Aircraft Company Switchable dual mode directional filter system
JP3050099B2 (ja) * 1995-09-01 2000-06-05 株式会社村田製作所 誘電体フィルタおよびアンテナデュプレクサ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3706965A1 (de) * 1986-03-04 1987-09-10 Murata Manufacturing Co Doppel-modenfilter
EP0615303A1 (de) * 1993-03-12 1994-09-14 Matra Marconi Space Uk Limited Demultiplexer mit dielektrischem Resonator
EP0742603A1 (de) * 1995-05-12 1996-11-13 Alcatel N.V. Dielektrischer Resonator für Mikrowellenfilter und Filter damit
US5804534A (en) * 1996-04-19 1998-09-08 University Of Maryland High performance dual mode microwave filter with cavity and conducting or superconducting loading element

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KAPILEVICH B Y ET AL: "A COMPACT MICROWAVE FILTER BASED ON A THREE-MODE CUTOFF WAVEGUIDE-DIELECTRIC CAVITY", TELECOMMUNICATIONS AND RADIO ENGINEERING, BEGELL HOUSE, INC., NEW YORK, NY, US, vol. 41/42, no. 9, 1 September 1987 (1987-09-01), pages 97 - 100, XP000027726, ISSN: 0040-2508 *
YU.M. BEZBORODOV ET AL.: "MICROWAVE FILTERS USING CROSS-SHAPED DIELECTRIC RESONATORS", TELECOMMUNICATIONS & RADIO ENGINEERING, vol. 39/40, no. 4, April 1985 (1985-04-01), Silver Spring, Maryland, US, pages 121 - 123, XP002176995 *

Also Published As

Publication number Publication date
ATE426925T1 (de) 2009-04-15
EP1233470B1 (de) 2009-03-25
ES2323405T3 (es) 2009-07-15
US20020110646A1 (en) 2002-08-15
FR2820884B1 (fr) 2003-05-16
FR2820884A1 (fr) 2002-08-16
US6617944B2 (en) 2003-09-09
DE60138087D1 (de) 2009-05-07

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