EP0779672A1 - In Wellenleitertechnologie ausgeführtes pseudoelliptisches Filter für den Millimeterbereich - Google Patents

In Wellenleitertechnologie ausgeführtes pseudoelliptisches Filter für den Millimeterbereich Download PDF

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Publication number
EP0779672A1
EP0779672A1 EP96402571A EP96402571A EP0779672A1 EP 0779672 A1 EP0779672 A1 EP 0779672A1 EP 96402571 A EP96402571 A EP 96402571A EP 96402571 A EP96402571 A EP 96402571A EP 0779672 A1 EP0779672 A1 EP 0779672A1
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EP
European Patent Office
Prior art keywords
cavities
waveguide
retro
coupling
pseudo
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.)
Withdrawn
Application number
EP96402571A
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English (en)
French (fr)
Inventor
Jean-Denis Schubert
Jean-Claude Cruchon
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 Telspace SA
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Filing date
Publication date
Application filed by Alcatel Telspace SA filed Critical Alcatel Telspace SA
Publication of EP0779672A1 publication Critical patent/EP0779672A1/de
Withdrawn legal-status Critical Current

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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
    • H01P1/207—Hollow waveguide filters
    • H01P1/208—Cascaded cavities; Cascaded resonators inside a hollow waveguide structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49016—Antenna or wave energy "plumbing" making

Definitions

  • the field of the invention is that of microwave filters and relates more precisely to a pseudo-elliptical filter in the millimeter range produced in waveguide technology.
  • a pseudo-elliptical filter in waveguide technology comprises a certain number of resonant cavities coupled together, for example by irises, and there are a certain number of retro-couplings between certain cavities.
  • microstrip lines It is known that back-couplings can be carried out in the form of microstrip lines.
  • This solution is however not optimal when the filter is carried out in waveguide technology (ie using resonant cavities) because the technologies are not the same. It is therefore necessary to add microstrip lines, provide for impedance adaptations, etc. There follows an increase in terms of cost and size.
  • U.S. Patent No. 4,772,863 to Rosenberg et al. describes a pseudo-elliptical filter produced in waveguide technology and also comprising retro-couplings.
  • One of these filters comprising six cavities, is represented in FIG. 1.
  • the cavities are referenced 10 to 15, the positive couplings 16 to 20 and the retro-couplings 21 to 24.
  • the signal input is denoted E and the output signal is denoted S.
  • a particular arrangement of the cavities 10 to 15 makes it possible to carry out the retro-couplings 21 to 24 by simple irises between the cavities 10 and 13, 11 and 13, 13 and 15 and finally 10 and 15.
  • the disadvantage of this solution is that the signal inputs and outputs in each cavity are not located 90 ° from each other (the angle between a signal input and a signal output is here 120 ° ) and it follows that certain parasitic propagation modes are not suppressed. For example, when such a filter carries a main mode H 011 , the parasitic mode E 111 - which is the most annoying because it is at the same frequency as the mode H 011 - is not deleted in the signal filter output S.
  • the present invention aims in particular to remedy these drawbacks.
  • one of the objectives of the invention is to provide a pseudo-elliptical filter in the millimeter range produced in waveguide technology where the signal inputs and outputs of each cavity are at 90 ° from each other and where the retro-couplings between cavities are carried out without using any other technology, so as to reduce the cost and the bulk and facilitate its realization.
  • Another object of the invention is to provide such a filter where the retro-couplings are not dictated by a particular arrangement of the cavities.
  • a pseudo-elliptical filter comprising resonant cavities positively coupled together, the signal input and output of each cavity being at 90 ° one on the other, this filter comprising at least one signal retro-coupling between two of the cavities, this retro-coupling being produced in the form of a waveguide.
  • this waveguide are optimized so that a true retro-coupling exists between the cavities which it connects, that is to say that at the interfaces between the cavities and the waveguide field lines are parallel and in opposite directions.
  • the waveguide can have iris accesses and, in this case, the back-coupling is carried out on a magnetic field.
  • the waveguide can also have accesses by pins and, in this case, the back-coupling is carried out on an electric field.
  • Figure 2 is a perspective view of a half-shell of a pseudo-elliptical filter according to the present invention, the other half-shell being symmetrical to that shown.
  • the various retro-couplings between cavities of a pseudo-elliptical filter are carried out using waveguides of adequate dimensions, so that, if we consider a retro-coupling between two cavities , the electric or magnetic field conveyed from one of the cavities to the other of the cavities, by means of this waveguide, ideally presents a phase opposition with respect to the same field present in this other cavity.
  • each waveguide has accesses by iris, that is to say that it communicates with the cavities 30 and 33 (32 and 35) by irises 41 and 42 (43 and 44 respectively), the retro-couplings being carried out on magnetic fields. These magnetic fields are represented in some of the cavities, the resonance mode here being the H 011 mode.
  • the waveguides are not resonant and only convey the components of the signals presented at their accesses.
  • the phase ⁇ of the magnetic field coming from the cavity 30 and conveyed in guide 47 is a multiple of k. ⁇ , with odd k.
  • the magnetic field lines are then in opposite directions.
  • the waveguide 48 connecting the cavities 32 and 35 the lengths and sections of the waveguides 47 and 48 are such that the magnetic field coming from a cavity rotates by 540 ° in the waveguide between irises 41 and 42 (43 and 44 respectively).
  • the invention described so far is applied to a retro-coupling on magnetic fields but it is also possible to carry out the retro-couplings on electric fields.
  • a pinule (antenna) is provided at the end of each waveguide to couple on the electric field (case of H 10 mode for example).
  • two waveguides advantageously connect the cavities 30 and 33 and 32 and 35 respectively.
  • a similar result can be obtained by retro-coupling the cavities 31 and 34 by a waveguide of greater length.
  • retro-couplings will be made between cavities 30 and 33, 32 and 35, 34 and 37.
  • the invention is particularly applicable to pseudo-elliptical filters operating in the millimeter band (frequencies between 20 GHz and 100 GHz), but can be used beyond.

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EP96402571A 1995-12-12 1996-11-28 In Wellenleitertechnologie ausgeführtes pseudoelliptisches Filter für den Millimeterbereich Withdrawn EP0779672A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9514703 1995-12-12
FR9514703A FR2742262B1 (fr) 1995-12-12 1995-12-12 Filtre pseudo-elliptique dans le domaine millimetrique realise en technologie guide d'ondes

Publications (1)

Publication Number Publication Date
EP0779672A1 true EP0779672A1 (de) 1997-06-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96402571A Withdrawn EP0779672A1 (de) 1995-12-12 1996-11-28 In Wellenleitertechnologie ausgeführtes pseudoelliptisches Filter für den Millimeterbereich

Country Status (4)

Country Link
US (1) US5801606A (de)
EP (1) EP0779672A1 (de)
CA (1) CA2192706A1 (de)
FR (1) FR2742262B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1187248A3 (de) * 2000-08-29 2003-07-02 Com Dev Ltd. Seitengekoppeltes Mikrowellenfilter mit am Umfang beabstandeten Blenden
RU2256260C1 (ru) * 2003-09-29 2005-07-10 Открытое акционерное общество "Российский институт радионавигации и времени" Резонансный свч блок
RU2329573C2 (ru) * 2006-06-23 2008-07-20 Федеральное государственное унитарное предприятие "Российский научно-исследовательский институт космического приборостроения" Мембрана свч-фильтра

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69834370T2 (de) * 1997-08-28 2007-03-15 The Boeing Co., Chicago Kupplungsmechanismus für TE011- und TE01delta- Mode-Resonatoren
DE10208666A1 (de) * 2002-02-28 2003-09-04 Marconi Comm Gmbh Bandpassfilter mit parallelen Signalwegen
US6657521B2 (en) 2002-04-26 2003-12-02 The Boeing Company Microwave waveguide filter having rectangular cavities, and method for its fabrication
CN111029690B (zh) * 2019-12-05 2021-09-14 中国联合网络通信集团有限公司 一种滤波器
CN113036365A (zh) * 2019-12-25 2021-06-25 深圳市大富科技股份有限公司 通信设备及其滤波器
CN113036372A (zh) * 2019-12-25 2021-06-25 深圳市大富科技股份有限公司 一种滤波器及通信设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749523A (en) * 1951-12-01 1956-06-05 Itt Band pass filters
JPS52100955A (en) * 1976-02-20 1977-08-24 Nec Corp Microwave band-pass filter
US4360793A (en) * 1981-04-02 1982-11-23 Rhodes John D Extracted pole filter
EP0075498A1 (de) * 1981-09-04 1983-03-30 Thomson-Csf Hohlraumresonatorfilter mit Verkopplung nicht benachbarter Resonatoren
JPS58187001A (ja) * 1982-04-27 1983-11-01 Nec Corp 帯域通過「ろ」波器
US4772863A (en) 1986-06-25 1988-09-20 Ant Nachrichtentechnik Gmbh Microwave filter equipped with multiply coupled cavity resonators

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2657649C2 (de) * 1976-12-20 1982-04-29 Siemens AG, 1000 Berlin und 8000 München Filter für sehr kurze elektromagnetische Wellen
US5608363A (en) * 1994-04-01 1997-03-04 Com Dev Ltd. Folded single mode dielectric resonator filter with cross couplings between non-sequential adjacent resonators and cross diagonal couplings between non-sequential contiguous resonators

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749523A (en) * 1951-12-01 1956-06-05 Itt Band pass filters
JPS52100955A (en) * 1976-02-20 1977-08-24 Nec Corp Microwave band-pass filter
US4360793A (en) * 1981-04-02 1982-11-23 Rhodes John D Extracted pole filter
EP0075498A1 (de) * 1981-09-04 1983-03-30 Thomson-Csf Hohlraumresonatorfilter mit Verkopplung nicht benachbarter Resonatoren
JPS58187001A (ja) * 1982-04-27 1983-11-01 Nec Corp 帯域通過「ろ」波器
US4772863A (en) 1986-06-25 1988-09-20 Ant Nachrichtentechnik Gmbh Microwave filter equipped with multiply coupled cavity resonators

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
A.E. ATIA, A.E. WILLIAMS: "New types of waveguide bandpass filters for satellite transponders", COMSAT TECHNICAL REVIEW, vol. 1, no. 1, 1971
A.S. BELOV, YU.S. UKRAINTSEV: "Synthesis of Microwave Bandpass Filters with Zolotarev Characteristics", JTT TELECOMMUNICATIONS & RADIO ENG. PART 1, vol. 36, no. 3, March 1982 (1982-03-01), pages 44 - 49
J.A. CURTIS, S.J. FIEDZIUSKO: "Miniature dual mode microstrip filters", MTT-S DIGEST, IEEE, 1991, pages 443 - 446
PATENT ABSTRACTS OF JAPAN vol. 1, no. 156 (E - 074)<8545> 13 December 1977 (1977-12-13) *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 25 (E - 225)<1462> 2 February 1984 (1984-02-02) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1187248A3 (de) * 2000-08-29 2003-07-02 Com Dev Ltd. Seitengekoppeltes Mikrowellenfilter mit am Umfang beabstandeten Blenden
RU2256260C1 (ru) * 2003-09-29 2005-07-10 Открытое акционерное общество "Российский институт радионавигации и времени" Резонансный свч блок
RU2329573C2 (ru) * 2006-06-23 2008-07-20 Федеральное государственное унитарное предприятие "Российский научно-исследовательский институт космического приборостроения" Мембрана свч-фильтра

Also Published As

Publication number Publication date
FR2742262B1 (fr) 1998-01-09
CA2192706A1 (fr) 1997-06-13
FR2742262A1 (fr) 1997-06-13
US5801606A (en) 1998-09-01

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