EP0328948A1 - Filter mit einem dielektrischen Resonator - Google Patents

Filter mit einem dielektrischen Resonator Download PDF

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Publication number
EP0328948A1
EP0328948A1 EP89101801A EP89101801A EP0328948A1 EP 0328948 A1 EP0328948 A1 EP 0328948A1 EP 89101801 A EP89101801 A EP 89101801A EP 89101801 A EP89101801 A EP 89101801A EP 0328948 A1 EP0328948 A1 EP 0328948A1
Authority
EP
European Patent Office
Prior art keywords
cavity
filter
filter according
resonator
bearing
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
EP89101801A
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English (en)
French (fr)
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EP0328948B1 (de
Inventor
Jean Michel Gueble
Bernard Theron
Yannick Latouche
Bernard Ducrocq
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 Espace Industries SA
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Alcatel Espace Industries SA
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Publication date
Application filed by Alcatel Espace Industries SA filed Critical Alcatel Espace Industries SA
Publication of EP0328948A1 publication Critical patent/EP0328948A1/de
Application granted granted Critical
Publication of EP0328948B1 publication Critical patent/EP0328948B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01P1/207—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/10—Dielectric resonators

Definitions

  • the invention relates to a dielectric resonator filter.
  • Such a filter is based on the following principles: - Use of the modes of the shielded dielectric resonator. - Reuse of classical methods of excitation and coupling of modes, in particular thanks to: * adjustment screws acting on the electric field. * coupling irises using the magnetic field.
  • European patent application No. 0 064 799 describes a ceramic resonator element arranged in a cavity to form a composite microwave resonator.
  • Two tuning screws, located in the cavity along orthogonal axes, make it possible to achieve the tuning of the assembly along these axes, at frequencies close to the fundamental resonance frequency of the resonator element.
  • Several cavities of this type can be assembled to form a waveguide using several transverse partitions. The coupling between these different cavities can then be carried out using simple slots, two cross-shaped slots or using circular iris.
  • an adjustment screw is positioned along an axis at 45 ° relative to the orthogonal tuning screws so that the resonance along one of the orthogonal axes is coupled to the resonance along the other axis.
  • - low-loss insulating materials in the form of a column or cushion polystyrene or PTFE (polytetrafluoroethylene), foam.
  • the invention while making it possible to optimize the response curves of filters with dielectric resonators in a band close to resonance and in wide band, aims to resolve the various questions raised for the production of these filters.
  • a dielectric resonator filter comprising at least one cylindrical cavity inside which there is a cylindrical dielectric resonator whose axis of symmetry is collinear with that of said cavity, characterized in that the resonator is maintained , in an asymmetrical longitudinal position inside said cavity, by a mandrel system which encircles it on its cylindrical part and which comprises at least one foot for fixing to said cavity allowing play with respect to this cavity.
  • Such a filter has many advantages, namely: it allows a sufficient frequency difference between the HE mode 1.1, ⁇ for example and the other modes so as to obtain a fairly wide free band of parasitic modes, the dimensions of the coupling slots remain small, which greatly reduces the parasitic couplings, - it allows filters with a structure that is more than dual mode.
  • the invention relates to a dielectric resonator filter in which: - the cavity is closed at at least one of its ends by an iris, the resonator is held by a mandrel system fixed to the internal wall of the cavity by three feet at 120 ° from one another, one being a fixed point, the other two allowing play between the cavity and the mandrel system thanks to elastic seals which allow to absorb any radial stress obtained due to differential expansions.
  • this mandrel system can be produced by three cylindrical parts: . a first part ending at a first longitudinal end by a conical internal bearing and at its second end by a threaded internal bearing, . a second movable part inside this first part, an external inclined bearing of which can slide against the conical bearing, . a threaded part engaged in the threaded seat of the first part,
  • the mandrel system and the screws are made of dielectric material, the cavity is of silver aluminum as well as each iris.
  • Such characteristics allow: - optimize the overvoltage coefficient (no lossy material in critical areas), - to obtain a temperature stability coefficient of around 4 ppm / ° C (ppm or parts per million), which is compensable by using a dielectric resonator at -4 ppm / ° C.
  • the resonator filter according to the invention is formed by a cylindrical cavity 10 inside which is a cylindrical dielectric resonator 11 whose axis of symmetry ⁇ is collinear with that of said cavity 10 .
  • This resonator 11 has, here, an asymmetrical position inside the cavity 10.
  • This cavity 10 is closed for example by two irises 14 and 15.
  • the resonator 11 is held in the cavity 10 by a mandrel system 16 which encloses it on its cylindrical part.
  • this mandrel system is fixed to the internal wall 17 of the cavity by three feet 18, 19 and 20, at 120 ° from one another, one 18 being fixed against said wall 17, the two others 19 and 20 allowing a clearance between this wall 17 and the mandrel system 16 thanks to the elastic seals 22 and 23 which make it possible to absorb any radial stress obtained due to differential expansions.
  • these three feet 18, 19 and 20 can be identical.
  • the mandrel system 16 can be produced by three cylindrical parts: - A first part 25 ending at a first longitudinal end by a conical internal bearing 26 and at its second end by a threaded internal bearing 27; - A second movable part 28 inside this first part 25, an external inclined bearing 29 of which can slide against the preceding conical bearing 26; - a threaded part 30 engaged in the threaded bearing of the first part 25.
  • the first part comprises three internally threaded external ends situated at 120 ° from one another, into which three screws 31, 33 and 37 can be introduced, each pressing on a metal washer 38 (39, 40) which rests on a gasket made of material.
  • elastic 21 (22 or 23) making it possible to compensate for the thermal expansion of the materials which form the filter.
  • Figure 3 has been shown only one 31 of these three screws 31, 33, 37 which is introduced into a threaded end 32, and which rests on the washer 38.
  • the use of silver aluminum cavities and adjustment devices is taken as a basis.
  • the filter of the invention meets the following characteristics: the resonator 11 is held by a mandrel system whose tightening torque is determined to hold accelerations up to 30 g and significant thermal stresses, - this mandrel system is held in the aluminum cavity by three screws of dielectric material, at 120 ° from each other.
  • constituent elements of the filter of the invention have the following dimensions:
  • . h 1.5 mm (distance between the end of the resonator and the iris) .
  • D 10 mm (distance between the iris and the fixation) .
  • X 2.8 mm distance between the attachment and the point where the resonator is held)

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EP89101801A 1988-02-12 1989-02-02 Filter mit einem dielektrischen Resonator Expired - Lifetime EP0328948B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8801696 1988-02-12
FR8801696A FR2627329B1 (fr) 1988-02-12 1988-02-12 Filtre a resonateur dielectrique

Publications (2)

Publication Number Publication Date
EP0328948A1 true EP0328948A1 (de) 1989-08-23
EP0328948B1 EP0328948B1 (de) 1993-12-15

Family

ID=9363227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89101801A Expired - Lifetime EP0328948B1 (de) 1988-02-12 1989-02-02 Filter mit einem dielektrischen Resonator

Country Status (6)

Country Link
US (1) US4939489A (de)
EP (1) EP0328948B1 (de)
JP (1) JPH01245702A (de)
CA (1) CA1306022C (de)
DE (1) DE68911333T2 (de)
FR (1) FR2627329B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5034711A (en) * 1990-01-23 1991-07-23 Hughes Aircraft Company Dielectric resonator support system for a waveguide
US6603374B1 (en) 1995-07-06 2003-08-05 Robert Bosch Gmbh Waveguide resonator device and filter structure provided therewith
EP3145022A1 (de) * 2015-09-15 2017-03-22 Spinner GmbH Mikrowellen-hf-filter mit dielektrischem resonator
EP3280000A4 (de) * 2015-04-29 2018-04-11 Huawei Technologies Co., Ltd. Dielektrisches filter

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2646022B1 (fr) * 1989-04-13 1991-06-07 Alcatel Espace Filtre a resonateur dielectrique
US5323129A (en) * 1992-01-10 1994-06-21 Gardiner Communications Corporation Resonator mounting apparatus
US5498771A (en) * 1993-12-03 1996-03-12 Com Dev Ltd. Miniaturized dielectric resonator filters and method of operation thereof at cryogenic temperatures
US5515016A (en) * 1994-06-06 1996-05-07 Space Systems/Loral, Inc. High power dielectric resonator filter
US6323746B1 (en) 1997-08-25 2001-11-27 Control Devices, Inc. Dielectric mounting system
US6092924A (en) * 1998-02-10 2000-07-25 Denver Instrument Company Microwave moisture analyzer: apparatus and method
US6247246B1 (en) 1998-05-27 2001-06-19 Denver Instrument Company Microwave moisture analyzer: apparatus and method
CN106910967B (zh) * 2017-03-23 2020-10-16 广东通宇通讯股份有限公司 射频器件及其双端短路介质滤波器

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2405437A (en) * 1942-09-01 1946-08-06 Gen Electric Impedance matching transformer
US3009123A (en) * 1960-04-26 1961-11-14 Bell Telephone Labor Inc Tunable two mode cavity resonator
GB882408A (en) * 1959-02-20 1961-11-15 Patelhold Patentverwertung Improvements in or relating to microwave resonators
US3213393A (en) * 1963-05-03 1965-10-19 Westinghouse Electric Corp Cavity device
US3249890A (en) * 1963-03-27 1966-05-03 Charles A Beaty Cavity termination for microwave oscillators
US4035749A (en) * 1976-04-06 1977-07-12 Harvard Industries, Inc. Microwave tuning screw assembly having positive shorting
FR2391569A1 (fr) * 1977-05-20 1978-12-15 Patelhold Patentverwertung Resonateur pour oscillations electromagnetiques a haute frequence
EP0068919A1 (de) * 1981-06-02 1983-01-05 Thomson-Csf Mikrowellenresonator vom Typ eines mit Dielektrikum versehenen veränderbaren Kondensators
US4630009A (en) * 1984-01-24 1986-12-16 Com Dev Ltd. Cascade waveguide triple-mode filters useable as a group delay equalizer

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US3636480A (en) * 1970-01-28 1972-01-18 Sperry Rand Corp Stable solid dielectric microwave resonator and separable waveguide means
JPS5426981A (en) * 1977-08-03 1979-02-28 Matsushita Electric Ind Co Ltd Prosuction of exhaust gas removal catalyst
US4500729A (en) * 1978-06-28 1985-02-19 Givaudan Corporation 2-Methyl-2-buten-1-yl tiglate
US4460896A (en) * 1980-06-16 1984-07-17 Shmitka Clarence F Antenna with tunable helical resonator
JPS57194363A (en) * 1981-05-25 1982-11-29 Murata Mfg Co Ltd Measuring jig for dielectric resonator
US4431500A (en) * 1981-12-15 1984-02-14 Vanguard Research Associates, Inc. Selective electroplating apparatus
US4437073A (en) * 1982-02-09 1984-03-13 The United States Of America As Represented By The Secretary Of The Air Force Equalizer cavity with independent amplitude control
JPS59176905A (ja) * 1983-03-26 1984-10-06 Fujitsu Ltd 誘電体共振器
JPS59176906A (ja) * 1983-03-26 1984-10-06 Fujitsu Ltd 誘電体共振器
CA1192635A (en) * 1983-05-16 1985-08-27 Northern Telecom Limited Microwave cavity tuner
JPS61218202A (ja) * 1985-03-25 1986-09-27 Nippon Soken Inc 誘電体共振装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2405437A (en) * 1942-09-01 1946-08-06 Gen Electric Impedance matching transformer
GB882408A (en) * 1959-02-20 1961-11-15 Patelhold Patentverwertung Improvements in or relating to microwave resonators
US3009123A (en) * 1960-04-26 1961-11-14 Bell Telephone Labor Inc Tunable two mode cavity resonator
US3249890A (en) * 1963-03-27 1966-05-03 Charles A Beaty Cavity termination for microwave oscillators
US3213393A (en) * 1963-05-03 1965-10-19 Westinghouse Electric Corp Cavity device
US4035749A (en) * 1976-04-06 1977-07-12 Harvard Industries, Inc. Microwave tuning screw assembly having positive shorting
FR2391569A1 (fr) * 1977-05-20 1978-12-15 Patelhold Patentverwertung Resonateur pour oscillations electromagnetiques a haute frequence
EP0068919A1 (de) * 1981-06-02 1983-01-05 Thomson-Csf Mikrowellenresonator vom Typ eines mit Dielektrikum versehenen veränderbaren Kondensators
US4630009A (en) * 1984-01-24 1986-12-16 Com Dev Ltd. Cascade waveguide triple-mode filters useable as a group delay equalizer

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 11, no. 59 (E-482)[2506], 24 février 1987, page 24 E 482; & JP-A-61 218 202 (NIPPON SOKEN INC.) 27-09-1986 *
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 42 (P-177)[1187], 19 février 1983, page 149 P 177; & JP-A-57 194 363 (MURATA SEISAKUSHO K.K.) 29-11-1982 *
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 31 (E-295)[1754], 9 février 1985, page 162 E 295; & JP-A-59 176 906 (FUJITSU K.K.) 06-10-1984 *
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 31 (E-295)[1754], 9 février 1985; & JP-A-59 176 905 (FUJITSU K.K.) 06-10-1984 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5034711A (en) * 1990-01-23 1991-07-23 Hughes Aircraft Company Dielectric resonator support system for a waveguide
EP0438807A2 (de) * 1990-01-23 1991-07-31 Hughes Aircraft Company Haltevorrichtung für einen dielektrischen Resonator in einem Wellenleiter
EP0438807A3 (en) * 1990-01-23 1991-12-11 Hughes Aircraft Company A dielectric resonator support system for a waveguide
US6603374B1 (en) 1995-07-06 2003-08-05 Robert Bosch Gmbh Waveguide resonator device and filter structure provided therewith
EP3280000A4 (de) * 2015-04-29 2018-04-11 Huawei Technologies Co., Ltd. Dielektrisches filter
EP3145022A1 (de) * 2015-09-15 2017-03-22 Spinner GmbH Mikrowellen-hf-filter mit dielektrischem resonator
US10862183B2 (en) 2015-09-15 2020-12-08 Spinner Gmbh Microwave bandpass filter comprising a conductive housing with a dielectric resonator therein and including an internal coupling element providing coupling between HEEx and HEEy modes

Also Published As

Publication number Publication date
CA1306022C (fr) 1992-08-04
US4939489A (en) 1990-07-03
EP0328948B1 (de) 1993-12-15
DE68911333T2 (de) 1994-04-07
FR2627329A1 (fr) 1989-08-18
JPH01245702A (ja) 1989-09-29
DE68911333D1 (de) 1994-01-27
FR2627329B1 (fr) 1990-03-23

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