FR2389273A2 - Electromechanical band-pass filter with cylindrical resonators - has half wavelength resonators with quarter wavelength coupling elements and coupling bridge - Google Patents

Electromechanical band-pass filter with cylindrical resonators - has half wavelength resonators with quarter wavelength coupling elements and coupling bridge

Info

Publication number
FR2389273A2
FR2389273A2 FR7712410A FR7712410A FR2389273A2 FR 2389273 A2 FR2389273 A2 FR 2389273A2 FR 7712410 A FR7712410 A FR 7712410A FR 7712410 A FR7712410 A FR 7712410A FR 2389273 A2 FR2389273 A2 FR 2389273A2
Authority
FR
France
Prior art keywords
resonators
coupling
wavelength
coupling elements
pass 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
FR7712410A
Other languages
French (fr)
Other versions
FR2389273B2 (en
Inventor
Herbert Ernyei
Etienne Langlois
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.)
Lignes Telegraphiques et Telephoniques LTT SA
Original Assignee
Lignes Telegraphiques et Telephoniques LTT SA
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 Lignes Telegraphiques et Telephoniques LTT SA filed Critical Lignes Telegraphiques et Telephoniques LTT SA
Priority to FR7712410A priority Critical patent/FR2389273A2/en
Priority to US05/862,906 priority patent/US4163960A/en
Priority to DE19772758908 priority patent/DE2758908A1/en
Publication of FR2389273A2 publication Critical patent/FR2389273A2/en
Application granted granted Critical
Publication of FR2389273B2 publication Critical patent/FR2389273B2/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/48—Coupling means therefor
    • H03H9/50—Mechanical coupling means

Abstract

The resonator axes are parallel and are arranged in two parallel planes. Two resonators carry transducers connected to input and output terminals. Coupling elements are provided between adjacent resonators, and at least one coupling bridge is provided between non-adjacent resonators. The length of longitudinally oscillating resonators is equal to half the wavelength at the pass-band centre frequency. Coupling elements carrying out flexural oscillations have a length of a quarter wavelength at the centre frequency. Bridges also carrying out flexural oscillations.
FR7712410A 1976-12-30 1977-04-25 Electromechanical band-pass filter with cylindrical resonators - has half wavelength resonators with quarter wavelength coupling elements and coupling bridge Granted FR2389273A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7712410A FR2389273A2 (en) 1977-04-25 1977-04-25 Electromechanical band-pass filter with cylindrical resonators - has half wavelength resonators with quarter wavelength coupling elements and coupling bridge
US05/862,906 US4163960A (en) 1976-12-30 1977-12-21 Electromechanical filter structure
DE19772758908 DE2758908A1 (en) 1976-12-30 1977-12-30 ELECTROMECHANICAL BAND FILTER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7712410A FR2389273A2 (en) 1977-04-25 1977-04-25 Electromechanical band-pass filter with cylindrical resonators - has half wavelength resonators with quarter wavelength coupling elements and coupling bridge

Publications (2)

Publication Number Publication Date
FR2389273A2 true FR2389273A2 (en) 1978-11-24
FR2389273B2 FR2389273B2 (en) 1980-11-07

Family

ID=9189860

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7712410A Granted FR2389273A2 (en) 1976-12-30 1977-04-25 Electromechanical band-pass filter with cylindrical resonators - has half wavelength resonators with quarter wavelength coupling elements and coupling bridge

Country Status (1)

Country Link
FR (1) FR2389273A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022690A1 (en) * 1979-07-13 1981-01-21 Lignes Telegraphiques Et Telephoniques L.T.T. Electromechanical filter elements and band-pass filter incorporating same
EP0023162A1 (en) * 1979-07-18 1981-01-28 Lignes Telegraphiques Et Telephoniques L.T.T. Electromechanical band-pass filters

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022690A1 (en) * 1979-07-13 1981-01-21 Lignes Telegraphiques Et Telephoniques L.T.T. Electromechanical filter elements and band-pass filter incorporating same
FR2461403A1 (en) * 1979-07-13 1981-01-30 Lignes Telegraph Telephon IMPROVED STRUCTURE OF ELECTROMECHANICAL FILTER CELLS AND BANDPASS FILTERS INCORPORATING THEM
EP0023162A1 (en) * 1979-07-18 1981-01-28 Lignes Telegraphiques Et Telephoniques L.T.T. Electromechanical band-pass filters
FR2462059A1 (en) * 1979-07-18 1981-02-06 Lignes Telegraph Telephon IMPROVEMENTS TO ELECTROMECHANICAL FILTERS BAND-BAND

Also Published As

Publication number Publication date
FR2389273B2 (en) 1980-11-07

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