EP0053986A3 - Bandpass filter tunable to a predetermined number of discrete frequencies in a broad frequency band - Google Patents

Bandpass filter tunable to a predetermined number of discrete frequencies in a broad frequency band Download PDF

Info

Publication number
EP0053986A3
EP0053986A3 EP81401956A EP81401956A EP0053986A3 EP 0053986 A3 EP0053986 A3 EP 0053986A3 EP 81401956 A EP81401956 A EP 81401956A EP 81401956 A EP81401956 A EP 81401956A EP 0053986 A3 EP0053986 A3 EP 0053986A3
Authority
EP
European Patent Office
Prior art keywords
frequency band
predetermined number
bandpass filter
broad frequency
discrete frequencies
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Withdrawn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
EP81401956A
Other languages
German (de)
French (fr)
Other versions
EP0053986A2 (en
Inventor
Gilles Beauquet
Vasudéo Devarhubli
Gérard Dubost
Michel Jacques Robert Nicolas
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.)
Safran Aircraft Engines SAS
Original Assignee
Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
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 Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA filed Critical Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
Publication of EP0053986A2 publication Critical patent/EP0053986A2/en
Publication of EP0053986A3 publication Critical patent/EP0053986A3/en
Withdrawn legal-status Critical Current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
    • H01P1/201—Filters for transverse electromagnetic waves
    • H01P1/202—Coaxial filters

Abstract

Filtre coaxial dont au moins l'un des conducteurs interne (3) et externe (1) est divisé en sections (S₁ à S₄) par des coupures (11 à 14) formées par des fentes annulaires dont l'épaisseur est très faible par rapport à la longueur d'onde. Coaxial filter with at least one of the internal conductors (3) and external (1) is divided into sections (S₁ to S₄) by cuts (11 to 14) formed by annular slots of which the thickness is very small compared to the wavelength.

Chaque section S₁ à S₄ comprend au moins un élément réactif d'accord (21 à 24) tel qu'une portion de ligne coaxiale ouverte (21) ou court-circuitée (22 à 24) et au moins un élément commutateur (31 à 34) disposé au voisinage de la coupure (11 à 14) correspondante pour sélectivement court-­ circuiter cette coupure ou réaliser l'insertion de l'élément réactif d'accord correspondant en réponse à des moyens électroniques de commande. Each section S₁ to S₄ includes at least one element tuning reagent (21 to 24) such as a portion of coaxial line open (21) or short-circuited (22 to 24) and at least one switch element (31 to 34) arranged in the vicinity of the corresponding cutoff (11 to 14) for selectively short circuit this break or insert the element corresponding tuning reagent in response to means control electronics.

Application aux télécommunications. Application to telecommunications.

EP81401956A 1980-12-10 1981-12-09 Bandpass filter tunable to a predetermined number of discrete frequencies in a broad frequency band Withdrawn EP0053986A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8026217 1980-12-10
FR8026217A FR2495844A1 (en) 1980-12-10 1980-12-10 TUNABLE TAG FILTER ON A PREDETERMINED NUMBER OF DISCRETE FREQUENCIES DISTRIBUTED IN A BROADBAND OF FREQUENCIES

Publications (2)

Publication Number Publication Date
EP0053986A2 EP0053986A2 (en) 1982-06-16
EP0053986A3 true EP0053986A3 (en) 1982-07-21

Family

ID=9248910

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401956A Withdrawn EP0053986A3 (en) 1980-12-10 1981-12-09 Bandpass filter tunable to a predetermined number of discrete frequencies in a broad frequency band

Country Status (5)

Country Link
US (1) US4472695A (en)
EP (1) EP0053986A3 (en)
JP (1) JPS57123701A (en)
FR (1) FR2495844A1 (en)
WO (1) WO1986003890A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5065121A (en) * 1988-03-29 1991-11-12 Rf Products, Inc. Switchable resonator device
JP2000151207A (en) 1998-11-12 2000-05-30 Mitsubishi Electric Corp Low pass filter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444485A (en) * 1967-03-17 1969-05-13 Bell Telephone Labor Inc Single adjustment,variable selectivity-constant frequency coaxial transmission line filter
US3927347A (en) * 1974-03-22 1975-12-16 Varian Associates Microwave tube using electronically tunable cavity resonator
US4004257A (en) * 1975-07-09 1977-01-18 Vitek Electronics, Inc. Transmission line filter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2630490A (en) * 1946-01-03 1953-03-03 Paul I Richards Coaxial transmission line filter
US3546633A (en) * 1966-01-04 1970-12-08 Gen Electric Electrically tunable microwave band-stop switch
US3569874A (en) * 1967-08-28 1971-03-09 Nippon Electric Co Microwave switching device employing a reed switch element
US4066988A (en) * 1976-09-07 1978-01-03 Stanford Research Institute Electromagnetic resonators having slot-located switches for tuning to different frequencies
US4179673A (en) * 1977-02-14 1979-12-18 Murata Manufacturing Co., Ltd. Interdigital filter
US4127829A (en) * 1977-03-28 1978-11-28 Microwave Development Labs. Inc. Fail-safe power combining and switching network

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444485A (en) * 1967-03-17 1969-05-13 Bell Telephone Labor Inc Single adjustment,variable selectivity-constant frequency coaxial transmission line filter
US3927347A (en) * 1974-03-22 1975-12-16 Varian Associates Microwave tube using electronically tunable cavity resonator
US4004257A (en) * 1975-07-09 1977-01-18 Vitek Electronics, Inc. Transmission line filter

Also Published As

Publication number Publication date
JPS57123701A (en) 1982-08-02
WO1986003890A1 (en) 1986-07-03
FR2495844B1 (en) 1984-05-11
EP0053986A2 (en) 1982-06-16
FR2495844A1 (en) 1982-06-11
US4472695A (en) 1984-09-18

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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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

17P Request for examination filed

Effective date: 19811215

AK Designated contracting states

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

AK Designated contracting states

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

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840720

RIN1 Information on inventor provided before grant (corrected)

Inventor name: NICOLAS, MICHEL JACQUES ROBERT

Inventor name: DEVARHUBLI, VASUDEO

Inventor name: DUBOST, GERARD

Inventor name: BEAUQUET, GILLES