EP0443481A1 - Abstimmbarer Mikrowellenfilter - Google Patents

Abstimmbarer Mikrowellenfilter Download PDF

Info

Publication number
EP0443481A1
EP0443481A1 EP91102262A EP91102262A EP0443481A1 EP 0443481 A1 EP0443481 A1 EP 0443481A1 EP 91102262 A EP91102262 A EP 91102262A EP 91102262 A EP91102262 A EP 91102262A EP 0443481 A1 EP0443481 A1 EP 0443481A1
Authority
EP
European Patent Office
Prior art keywords
filter
ferrite
agile
microwave filter
resonator
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
EP91102262A
Other languages
English (en)
French (fr)
Other versions
EP0443481B1 (de
Inventor
Carol Brouzes
Claude Ressencourt
Alain De Place
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 CIT SA
Alcatel Lucent NV
Original Assignee
Alcatel Telspace SA
Alcatel Transmission par Faisceaux Hertziens SA
Alcatel NV
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 Alcatel Telspace SA, Alcatel Transmission par Faisceaux Hertziens SA, Alcatel NV filed Critical Alcatel Telspace SA
Publication of EP0443481A1 publication Critical patent/EP0443481A1/de
Application granted granted Critical
Publication of EP0443481B1 publication Critical patent/EP0443481B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/215—Frequency-selective devices, e.g. filters using ferromagnetic material
    • 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 present invention relates to an agile microwave filter, and in particular to a filter of this type suitable for use, both at transmission and at reception, for the production of frequency-agile radio-relay systems.
  • An agile filter is a filter whose central frequency can be voluntarily moved, in a range of frequencies which can cover a large fraction of an octave, by means of an electric or electronic control.
  • Such filters are, with frequency synthesizers, the essential elements for producing agile radio-relay systems, which are in particular widely used in applications where it is desired to be able to very quickly change the emission frequency of a signal.
  • the most conventional agile filter is the resonant cavity filter, the tuning of which is carried out mechanically under the control of a motor.
  • This type of filter can withstand high powers, but it can no longer be suitable in current applications because its operating time to achieve a frequency change is extremely high, of the order of a minute to fix ideas, while some Projected applications will require a channel switching time much less than a second, and more specifically on the order of a millisecond.
  • they have the other disadvantages of being bulky, rather heavy, and particularly expensive and complex to produce because of the delicate and precise mechanical requirements which are to be implemented.
  • variable capacity diodes or "varactors” which react in a very short time, typically of the order of a microsecond.
  • variable capacity diodes or "varactors”
  • Such filters cannot be envisaged, for radio-relay systems, because of their acceptable power which is much too low (less than 0 dBm), as well as their operating frequency which is, with the components currently known, limited to frequencies below 2 Gigahertz.
  • the document FR-A-2.521.786 describes, with reference to the document FR-A-2.509.537, a bandpass filter with dielectric resonators placed in a waveguide whose dimensions of the cross section are about 2.5 times the transverse dimensions of these resonators.
  • a Yttrium iron garnet tablet is placed on each of these dielectric resonators in order, under the action of adjustable external magnetic fields, to make this filter magnetically tunable.
  • the air gap of the magnetic circuits necessary for the creation of these magnetic fields is then very large, so that the number of amperes turns, and therefore the necessary current consumption, are very high to obtain a satisfactory range of variation.
  • the production of such composite resonators is quite expensive, precisely because of this composite character.
  • document FR-A-2,610,766 of the Applicant describes a power resonator made up at least partially of polycrystalline ferrite, and whose tuning is changed very quickly by the application of an adjustable external magnetic field.
  • the technique presented in this document is based on the use of a resonant coaxial line produced from a cylindrical bar of metallized polycrystalline ferrite.
  • This ferrite resonator is placed in a device capable of creating a variable magnetic field. The latter then varies the magnetic permeability of the ferrite material so as to modify the electrical length of the coaxial line, thereby varying the frequency of this resonator.
  • the no-load overvoltage of the structure described in this document FR-A-2,610,766 is limited by the metallic confinement of the microwave electromagnetic fields of the coaxial cavity, all the more sensitive as the permittivity dielectric of the material reduces the dimensions of the resonant cavity compared to its counterpart filled with air, as well as by the appearance of disturbing parasitic modes which would be consequent to a possible enlargement of the structure, carried out to increase this overvoltage at no load.
  • the invention aims to remedy these various drawbacks. It relates for this purpose to an agile microwave filter whose structure is similar to that of filters with dielectric resonator (s) placed (s) for example in a waveguide operating under the cutoff, but for which the or the dielectric confinement resonators are replaced by similar resonators, but made of ferrite material and not of purely dielectric material, means being moreover provided for applying to this or these ferrite resonators a magnetic field of adjustable intensity, so as to move the center frequency of the filter.
  • this agile microwave filter is composed of a ferrite cylinder 1, of diameter D and height h which, like filters with dielectric resonator (s) of the art known, is placed on the bottom of a portion 2 of section guide rectangular and operating in evanescent mode, that is to say under the cut.
  • the ferrite bar 1 operates in TM01 ⁇ mode, while the guide in evanescent mode 2 is excited in TM11 mode by a coaxial antenna 3 placed at the input of the filter and conventionally passing through a first metal end plate 4.
  • the input microwave signal is conveyed to this antenna 3 by the coaxial cable for supplying the signal 5.
  • the filter output signal is taken from the other end of the guide 2 by the coaxial antenna 6 which likewise crosses the second metal end plate 7, this antenna 6 conventionally extending the cable core output coaxial 8 (in the same way as the antenna 3 extends, for its part, the core of the input coaxial cable 5).
  • Ferrite bar 1 has the property, currently rather misunderstood, of having not only a high magnetic permeability, but also a rather high dielectric permittivity, its relative permittivity being of the order of 15, while that of resonator materials conventional dielectric is of the order of 40. It follows that, contrary to what one might think a priori, the bar 1 achieves here, without it being, like that of document FR-A-2,610,766 , shielded by two concentric metallic layers, a dielectric confinement giving it a resonator function.
  • the resonance frequency of the ferrite rod 1 depends on the product of its dielectric permittivity by its magnetic permeability, so that in fact it will be possible to vary the resonance frequency of the bar 1, and therefore the central frequency of tuning of the filter of FIG. 1 by varying this magnetic permeability which, for ferrite material, is possible by applying to it a polarizing magnetic field of adjustable intensity, like what is described in the document FR-A-2,610,766 cited above.
  • the ferrite bar 1 is also placed in a magnetic field H which is created, coaxially with the bar 1, between the two pole pieces 9, 10 of an electromagnet 11 comprising a soft iron magnetic circuit 12 and an excitation coil 13 traversed by a direct current of adjustable value: by varying the excitation current of the coil 13, the value of the field H is varied, and consequently the resonance frequency of the bar 1, this which moves the center frequency of the filter.
  • the central frequency of the microwave filter according to FIGS. 1 or 2 could be continuously displaced between 14,450 Gigahertz and 15,447 Gigahertz without excessive current consumption in these windings.
  • FIG. 3 shows the production of an agile bandpass filter formed by the association, in the same guide 2, of two ferrite resonators 15 and 16 also operating as resonators with dielectric confinement, this filter being basically similar to conventional band filters with dielectric resonators (see for example FIG. 1 of the document FR-A-2,590,537 cited above) except that the coupled resonators 15, 16 are made of ferrite and that in addition they are subjected, like the resonator 1 according to FIGS. 1 and 2, with the respective adjustable magnetic fields H1 and H2 created by the electromagnets 11 A and 11 B.
  • the windings 13 A and 13 B of these electromagnets 11 A and 11 B are each supplied with excitation current adjustable by a supply and control unit 17.
  • the invention is not limited to the exemplary embodiments which have just been described.
  • the relative dimensions of the resonators and of the guide could be different.
  • Other input and output coupling modes for example produced using iris, could be used, in which case the guide used could not operate in evanescent mode, etc.
  • the circuits electromagnets can, without going outside the scope of the invention, include permanent magnets contributing to the creation of the magnetic field.

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Gyroscopes (AREA)
EP91102262A 1990-02-23 1991-02-18 Abstimmbarer Mikrowellenfilter Expired - Lifetime EP0443481B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9002280A FR2658954B1 (fr) 1990-02-23 1990-02-23 Filtre agile hyperfrequence.
FR9002280 1990-02-23

Publications (2)

Publication Number Publication Date
EP0443481A1 true EP0443481A1 (de) 1991-08-28
EP0443481B1 EP0443481B1 (de) 1995-06-21

Family

ID=9394080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102262A Expired - Lifetime EP0443481B1 (de) 1990-02-23 1991-02-18 Abstimmbarer Mikrowellenfilter

Country Status (8)

Country Link
US (1) US5184097A (de)
EP (1) EP0443481B1 (de)
JP (1) JPH0537202A (de)
CA (1) CA2036829C (de)
DE (1) DE69110494T2 (de)
ES (1) ES2074180T3 (de)
FR (1) FR2658954B1 (de)
IL (1) IL97205A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694452A1 (fr) * 1992-07-30 1994-02-04 Alcatel Telspace Filtre passe-bande agile pour hyperfréquences.

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5440278A (en) * 1994-03-25 1995-08-08 Bartholomew; Darin Ferrite system for modulating, phase shifting, or attenuating radio frequency energy
ES2148042B1 (es) 1997-07-30 2001-05-01 Mecanismos Aux Es Ind S L Perfeccionamientos en las maquinas encintadoras.
US5959512A (en) * 1997-09-19 1999-09-28 Raytheon Company Electronically tuned voltage controlled evanescent mode waveguide filter
EP0915528A3 (de) * 1997-11-07 1999-08-11 Nec Corporation Hochfrequenzfilter und Verfahren zur Regelung seiner Frequenzcharakteristika
US8149073B2 (en) * 2007-08-03 2012-04-03 Murata Manufacturing Co., Ltd. Band-pass filter and method for making photonic crystal for the band-pass filter
JP6685643B2 (ja) * 2013-12-18 2020-04-22 スカイワークス ソリューションズ, インコーポレイテッドSkyworks Solutions, Inc. 同調可能な共振器システム、同調可能な共振器システムを含むフィルタリングシステム、および同調可能な共振器システムを形成する方法
CN114361754B (zh) * 2022-01-10 2022-10-14 电子科技大学 一种x波段磁控频率可调的定向耦合器
CN115792752B (zh) * 2022-10-14 2026-02-03 西南应用磁学研究所(中国电子科技集团公司第九研究所) 磁调谐滤波器用单晶谐振子铁磁共振线宽快速筛选装置及筛选方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001154A (en) * 1959-01-22 1961-09-19 Reggia Frank Electrically tuned microwave bandpass filter using ferrites
GB1340162A (en) * 1972-02-10 1973-12-12 Standard Telephones Cables Ltd Waveguide filter
US3919673A (en) * 1974-06-05 1975-11-11 Bell Telephone Labor Inc Nonreciprocal absorption filter
FR2521786A2 (fr) * 1981-02-27 1983-08-19 Thomson Csf Filtre passe-bande a resonateurs dielectriques

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2948868A (en) * 1955-11-14 1960-08-09 Bell Telephone Labor Inc Frequency sensitive electromagnetic wave device
GB1190547A (en) * 1969-03-05 1970-05-06 Standard Telephones Cables Ltd Improvements in Electrical Waveguide Arrangements
SU1319117A1 (ru) * 1971-07-20 1987-06-23 Предприятие П/Я А-1216 Гиромагнитный полосовой фильтр
US4122418A (en) * 1975-05-10 1978-10-24 Tsukasa Nagao Composite resonator
JPS52153360A (en) * 1976-06-14 1977-12-20 Murata Manufacturing Co Filter using dielectric resonator
FR2539565A1 (fr) * 1983-01-19 1984-07-20 Thomson Csf Filtre hyperfrequence accordable, a resonateurs dielectriques en mode tm010
JPS61201503A (ja) * 1985-03-05 1986-09-06 Tdk Corp 磁性体共振器
JPH06105844B2 (ja) * 1985-03-29 1994-12-21 富士通株式会社 誘電体フイルタ
JPS6276301A (ja) * 1985-09-27 1987-04-08 Murata Mfg Co Ltd 共振装置
SU1385164A1 (ru) * 1986-01-14 1988-03-30 Новосибирский электротехнический институт связи им.Н.Д.Псурцева Перестраиваемый фильтр
FR2610766B1 (fr) * 1987-02-11 1989-02-17 Alcatel Thomson Faisceaux Filtre hyperfrequence, accordable electroniquement
JPH02186802A (ja) * 1989-01-13 1990-07-23 Murata Mfg Co Ltd 静磁波フィルタ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001154A (en) * 1959-01-22 1961-09-19 Reggia Frank Electrically tuned microwave bandpass filter using ferrites
GB1340162A (en) * 1972-02-10 1973-12-12 Standard Telephones Cables Ltd Waveguide filter
US3919673A (en) * 1974-06-05 1975-11-11 Bell Telephone Labor Inc Nonreciprocal absorption filter
FR2521786A2 (fr) * 1981-02-27 1983-08-19 Thomson Csf Filtre passe-bande a resonateurs dielectriques

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES. vol. 29, no. 8, août 1981, NEW YORK US pages 754 - 770; J.K.PLOURDE et al.: "Application of dielectric resonators in microwave components" *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 70 (E-485)(2517) 03 mars 1987, & JP-A-61 225903 (FUJITSU LTD) 07 octobre 1986, *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694452A1 (fr) * 1992-07-30 1994-02-04 Alcatel Telspace Filtre passe-bande agile pour hyperfréquences.

Also Published As

Publication number Publication date
DE69110494T2 (de) 1995-11-09
IL97205A0 (en) 1992-05-25
JPH0537202A (ja) 1993-02-12
CA2036829A1 (fr) 1991-08-24
DE69110494D1 (de) 1995-07-27
CA2036829C (fr) 1994-09-20
FR2658954A1 (fr) 1991-08-30
US5184097A (en) 1993-02-02
FR2658954B1 (fr) 1992-10-02
EP0443481B1 (de) 1995-06-21
IL97205A (en) 1994-01-25
ES2074180T3 (es) 1995-09-01

Similar Documents

Publication Publication Date Title
EP0443481B1 (de) Abstimmbarer Mikrowellenfilter
EP0296007B1 (de) In Flüstergalerie-Modi angeregter Mikrowellenresonator
CA2037518A1 (fr) Dispositif applicateur d'ondes hyperfrequences pour le traitement de produits en feuille ou en nappe
FR2659499A1 (fr) Systeme de transmission d'energie electrique, aux hyperfrequences, a effet gyromagnetique, tel que circulateur, isolateur ou filtre.
EP3692598B1 (de) Antenne mit teilweise gesättigtem dispersivem ferromagnetischem substrat
EP0047686A1 (de) Hybrider Mikrowellenmischer
FR2537345A1 (fr) Circuit accordable a haute frequence, filtre utilisant ce circuit et procede pour sa fabrication
FR2535547A1 (fr) Resonateurs bi-rubans et filtres realises a partir de ces resonateurs
EP0060174B1 (de) Bandpassfilter mit dielektrischen Resonatoren
FR2659509A1 (fr) Resonateur dielectrique a rubans metalliques micro-ondes et dispositif utilisant un tel resonateur.
US6501971B1 (en) Magnetic ferrite microwave resonator frequency adjuster and tunable filter
FR2948236A1 (fr) Corps main gauche, dispositif de guidage d'ondes et antenne utilisant ce corps, procede de fabrication de ce corps
CA2457009A1 (fr) Circuit resonant hyperfrequence et filtre hyperfrequence accordable l'utilisant
FR2521786A2 (fr) Filtre passe-bande a resonateurs dielectriques
FR2610766A1 (fr) Filtre hyperfrequence, accordable electroniquement
FR2668304A1 (fr) Dephaseur reciproque en guide dielectrique a ferrite.
WO2007031639A1 (fr) Filtre a guide d'onde pour micro-ondes a parois non paralleles
FR2909192A1 (fr) Isolateur optique integre comportant un reseau de bragg
EP0537327B1 (de) Hochfrequenzröhre mit frequenzbestimmbarem Hohlraumresonator
FR2633389A1 (fr) Gyroscope a laser a anneau
EP0487388A1 (de) Drossel, insbesondere für Kurzwellen
FR2514197A1 (fr) Tube micro-onde a faisceau lineaire reglable focalise par aimant permanent
FR2512279A1 (fr) Cavite resonnante hyperfrequence
BE1005608A5 (fr) Dephaseur hyperfrequence.
EP0188966A1 (de) Oberflächenwellige nichtreziproke Mikrowellenvorrichtung und Isolator hoher Isolation mit Anwendung dergleichen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE ES FR GB IT LI NL SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ALCATEL N.V.

Owner name: ALCATEL TELSPACE

17P Request for examination filed

Effective date: 19920217

17Q First examination report despatched

Effective date: 19940321

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE ES FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 69110494

Country of ref document: DE

Date of ref document: 19950727

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2074180

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950829

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980112

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980116

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980123

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19980126

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19980127

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19980203

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19980216

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990219

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990219

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990228

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990901

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990218

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991029

EUG Se: european patent has lapsed

Ref document number: 91102262.2

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050218