FR2395643A1 - Dispositif a ondes acoustiques de surface - Google Patents

Dispositif a ondes acoustiques de surface

Info

Publication number
FR2395643A1
FR2395643A1 FR7818877A FR7818877A FR2395643A1 FR 2395643 A1 FR2395643 A1 FR 2395643A1 FR 7818877 A FR7818877 A FR 7818877A FR 7818877 A FR7818877 A FR 7818877A FR 2395643 A1 FR2395643 A1 FR 2395643A1
Authority
FR
France
Prior art keywords
path
surface acoustic
waves
disposed
propagation
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
FR7818877A
Other languages
English (en)
Other versions
FR2395643B3 (fr
Inventor
M E Dempsey
Ching-Wen Lee
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.)
Verizon Laboratories Inc
Original Assignee
GTE Laboratories Inc
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 GTE Laboratories Inc filed Critical GTE Laboratories Inc
Publication of FR2395643A1 publication Critical patent/FR2395643A1/fr
Application granted granted Critical
Publication of FR2395643B3 publication Critical patent/FR2395643B3/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
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02842—Means for compensation or elimination of undesirable effects of reflections

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

L'invention concerne les dispositifs à ondes acoustiques de surface du type à bandes latérales utilisés notamment comme filtres et lignes à retard. Selon l'invention, le dispositif comprend un milieu favorable à la propagation des ondes acoustiques de surface, un transducteur d'entrée engendrant les ondes de surface le long d'un premier chemin sur le substrat, un coupleur à bandes multiples disposé sur le premier chemin de propagation et s'étendant sur un second chemin de propagation separé et parallèle au premier et un transducteur de sortie disposé sur le second chemin. En outre un réflecteur est disposé sur le premier chemin près du transducteur de sortie, et une masse de matériau absorbant est disposée sur le second chemin près du transducteur d'entrée. Cette configuration permet d'éliminer les ondes dites de << triple parcours >> qui, après deux réflexions, interfèrent avec les ondes de surface utiles. Application : filtres de fréquence intermédiaire pour récepteurs de télévision.
FR7818877A 1977-06-23 1978-06-23 Dispositif a ondes acoustiques de surface Granted FR2395643A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/810,376 US4146851A (en) 1977-06-23 1977-06-23 Acoustic surface wave device

Publications (2)

Publication Number Publication Date
FR2395643A1 true FR2395643A1 (fr) 1979-01-19
FR2395643B3 FR2395643B3 (fr) 1981-02-20

Family

ID=25203714

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7818877A Granted FR2395643A1 (fr) 1977-06-23 1978-06-23 Dispositif a ondes acoustiques de surface

Country Status (4)

Country Link
US (1) US4146851A (fr)
BE (1) BE860227A (fr)
DE (1) DE2743071A1 (fr)
FR (1) FR2395643A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026114A1 (fr) * 1979-09-25 1981-04-01 Fujitsu Limited Dispositif à ondes acoustiques de surface
EP0031685A2 (fr) * 1979-12-27 1981-07-08 Fujitsu Limited Dispositif à ondes acoustiques de surface
EP0057598A2 (fr) * 1981-01-30 1982-08-11 Fujitsu Limited Dispositif à ondes acoustiques de surface

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321567A (en) * 1980-03-24 1982-03-23 Raytheon Company Combining series sections weighting with withdrawal weighting in SAW transducers
US4392116A (en) * 1980-10-14 1983-07-05 Zenith Radio Corporation Triple transit cancellation
EP0097642A1 (fr) * 1981-12-14 1984-01-11 Gte Products Corporation Cire acoustique sur un dispositif a ondes de surface
DE3209962A1 (de) * 1982-03-18 1983-09-29 Siemens AG, 1000 Berlin und 8000 München Mit akustischen wellen arbeitendes elektronisches bauelement
EP0172811A4 (fr) * 1984-02-21 1987-01-10 Gte Prod Corp Filtre d'ondes acoustiques en surface ayant une configuration triangulaire.
GB2157522B (en) * 1984-04-09 1987-08-19 Philips Electronic Associated Electrical filter comprising an acoustic surface wave device, and method of manufacturing such a filter
US4870312A (en) * 1987-02-19 1989-09-26 Hazeltine Corporation Surface wave device having anti-reflective shield
US5113115A (en) * 1991-06-19 1992-05-12 The United States Of America As Represented By The Secretary Of The Army Saw slanted array correlator with amplitude error compensating polymer reflective array grating
WO2015123668A1 (fr) 2014-02-14 2015-08-20 University Of Southern California Annulation à base d'hybrides en présence d'une désadaptation d'antenne
US9912326B2 (en) 2015-09-08 2018-03-06 Abtum Inc. Method for tuning feed-forward canceller
US10581650B2 (en) 2015-09-08 2020-03-03 Qorvo Us, Inc. Enhancing isolation in radio frequency multiplexers
US9762416B2 (en) 2015-09-08 2017-09-12 Abtum Inc. Reflection coefficient reader
US9866201B2 (en) 2015-09-08 2018-01-09 Abtum Inc. All-acoustic duplexers using directional couplers
US9755668B2 (en) 2015-09-30 2017-09-05 Abtum Inc. Radio frequency complex reflection coefficient reader
US10038458B2 (en) 2015-10-06 2018-07-31 Abtum Inc. Reflection-based radio-frequency multiplexers
KR102527018B1 (ko) 2015-10-12 2023-04-27 압툼 인크. 하이브리드 커플러 기반 무선 주파수 멀티플렉서
CN210201797U (zh) 2016-09-21 2020-03-27 Qorvo美国公司 射频双工器和具有增强隔离的可调谐射频双工器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662293A (en) * 1971-03-17 1972-05-09 Zenith Radio Corp Acoustic-wave transmitting device
US3727155A (en) * 1972-03-20 1973-04-10 Zenith Radio Corp Acoustic surface wave filter
US4038614A (en) * 1975-06-16 1977-07-26 Hughes Aircraft Company Fractional efficiency coupler
US4048594A (en) * 1976-01-02 1977-09-13 Hughes Aircraft Company Surface acoustic wave filter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026114A1 (fr) * 1979-09-25 1981-04-01 Fujitsu Limited Dispositif à ondes acoustiques de surface
EP0031685A2 (fr) * 1979-12-27 1981-07-08 Fujitsu Limited Dispositif à ondes acoustiques de surface
EP0031685A3 (en) * 1979-12-27 1981-10-07 Fujitsu Limited Surface acoustic wave device
EP0057598A2 (fr) * 1981-01-30 1982-08-11 Fujitsu Limited Dispositif à ondes acoustiques de surface
EP0057598A3 (en) * 1981-01-30 1982-09-08 Fujitsu Limited Acoustic surface wave device

Also Published As

Publication number Publication date
BE860227A (fr) 1978-02-15
FR2395643B3 (fr) 1981-02-20
DE2743071A1 (de) 1979-01-11
US4146851A (en) 1979-03-27

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Legal Events

Date Code Title Description
ST Notification of lapse