FR2133821A1 - - Google Patents

Info

Publication number
FR2133821A1
FR2133821A1 FR7213445A FR7213445A FR2133821A1 FR 2133821 A1 FR2133821 A1 FR 2133821A1 FR 7213445 A FR7213445 A FR 7213445A FR 7213445 A FR7213445 A FR 7213445A FR 2133821 A1 FR2133821 A1 FR 2133821A1
Authority
FR
France
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
FR7213445A
Other languages
French (fr)
Other versions
FR2133821B1 (cs
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co Ltd
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 Marconi Co Ltd filed Critical Marconi Co Ltd
Publication of FR2133821A1 publication Critical patent/FR2133821A1/fr
Application granted granted Critical
Publication of FR2133821B1 publication Critical patent/FR2133821B1/fr
Expired 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 elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14517—Means for weighting
    • H03H9/1452—Means for weighting by finger overlap length, apodisation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02881—Means for compensation or elimination of undesirable effects of diffraction of wave beam

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
FR7213445A 1971-04-17 1972-04-17 Expired FR2133821B1 (cs)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB973671A GB1360235A (en) 1971-04-17 1971-04-17 Acoustic surface wave devices

Publications (2)

Publication Number Publication Date
FR2133821A1 true FR2133821A1 (cs) 1972-12-01
FR2133821B1 FR2133821B1 (cs) 1979-01-12

Family

ID=9877785

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7213445A Expired FR2133821B1 (cs) 1971-04-17 1972-04-17

Country Status (2)

Country Link
FR (1) FR2133821B1 (cs)
GB (1) GB1360235A (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2321802A1 (fr) * 1975-08-18 1977-03-18 Philips Nv Filtre mettant a profit des ondes de surface acoustiques

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4918349A (en) * 1987-11-13 1990-04-17 Hitachi, Ltd. Surface acoustic wave device having apodized transducer provided with irregular pitch electrode group
JP3456810B2 (ja) 1995-11-10 2003-10-14 東芝電子エンジニアリング株式会社 弾性表面波フィルタ
JPH11225038A (ja) * 1998-02-06 1999-08-17 Murata Mfg Co Ltd 弾性表面波装置
DE102010055628B4 (de) 2010-12-22 2018-09-06 Snaptrack, Inc. Elektroakustischer Resonator

Non-Patent Citations (8)

* Cited by examiner, † Cited by third party
Title
(REVUE AMERICAINE:"APPLIED PHYSICS LETTERS",VOL 19,NO.11, LE 1ER DECEMBRE 1971 L'ARTICLE DE R.H.TANCREIL ET R.C.WILLIAMSON:"WIVEFRONT DISTORTION OF ACOUSTIC SURFACE WAVES FROM APODIZED INTERDIGITAL TRANSDUCER" PAGES 456-459 . *
*REVUE AMERICAINE"IEEE TRANSACTIONS ON MICROWAVE THEORYAND TECHNIQUES"VOL MTT-20,NO.2, FEVRIER 1972 L'ARTICLE DE H.M.GERARD ET AUTRE:"PHASE CORRECTIONS FOR WEIGHTED ACOUSTIC SURFACE-WAVE DISPERSIVE FILTERS" PAGES 188-192 .) *
AND TECHNIQUES"VOL MTT-20,NO.2, FEVRIER 1972 L'ARTICLE DE H.M.GERARD ET AUTRE:"PHASE *
CORRECTIONS FOR WEIGHTED ACOUSTIC SURFACE-WAVE DISPERSIVE FILTERS" PAGES 188-192 .) *
INTERDIGITAL TRANSDUCER" PAGES 456-459 . *
R.H.TANCREIL ET R.C.WILLIAMSON:"WIVEFRONT DISTORTION OF ACOUSTIC SURFACE WAVES FROM APODIZED *
REVUE AMERICAINE"IEEE TRANSACTIONS ON MICROWAVE THEORY *
REVUE AMERICAINE:"APPLIED PHYSICS LETTERS",VOL 19,NO.11, LE 1ER DECEMBRE 1971 L'ARTICLE DE *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2321802A1 (fr) * 1975-08-18 1977-03-18 Philips Nv Filtre mettant a profit des ondes de surface acoustiques

Also Published As

Publication number Publication date
GB1360235A (en) 1974-07-17
FR2133821B1 (cs) 1979-01-12

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Legal Events

Date Code Title Description
ST Notification of lapse