DE3072140D1 - Surface acoustic wave device - Google Patents

Surface acoustic wave device

Info

Publication number
DE3072140D1
DE3072140D1 DE8080303362T DE3072140T DE3072140D1 DE 3072140 D1 DE3072140 D1 DE 3072140D1 DE 8080303362 T DE8080303362 T DE 8080303362T DE 3072140 T DE3072140 T DE 3072140T DE 3072140 D1 DE3072140 D1 DE 3072140D1
Authority
DE
Germany
Prior art keywords
acoustic wave
surface acoustic
wave device
wave
acoustic
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.)
Expired
Application number
DE8080303362T
Other languages
English (en)
Inventor
Hisao Iwamoto
Noboru Wakatsuki
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Application granted granted Critical
Publication of DE3072140D1 publication Critical patent/DE3072140D1/de
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 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
    • H03H9/0285—Means for compensation or elimination of undesirable effects of reflections of triple transit echo
    • 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
    • H03H9/02637—Details concerning reflective or coupling arrays
    • H03H9/02795—Multi-strip couplers as track changers
    • 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
    • H03H9/02992—Details of bus bars, contact pads or other electrical connections for finger electrodes
    • 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
    • H03H9/125—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

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
DE8080303362T 1979-09-25 1980-09-24 Surface acoustic wave device Expired DE3072140D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54121933A JPS5937605B2 (ja) 1979-09-25 1979-09-25 弾性表面波素子

Publications (1)

Publication Number Publication Date
DE3072140D1 true DE3072140D1 (en) 1989-03-02

Family

ID=14823516

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8080303362T Expired DE3072140D1 (en) 1979-09-25 1980-09-24 Surface acoustic wave device

Country Status (4)

Country Link
US (1) US4342011A (de)
EP (1) EP0026114B1 (de)
JP (1) JPS5937605B2 (de)
DE (1) DE3072140D1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5693414A (en) * 1979-12-27 1981-07-29 Fujitsu Ltd Elastic surface wave element
US4392116A (en) * 1980-10-14 1983-07-05 Zenith Radio Corporation Triple transit cancellation
US4564858A (en) * 1981-03-31 1986-01-14 Harris Corporation Television SAW/VSB filter incorporating receiver equalizer
US4375624A (en) * 1981-06-22 1983-03-01 Zenith Radio Corporation Surface wave acoustic device with compensation for spurious frequency response modes
US4393358A (en) * 1981-11-18 1983-07-12 Zenith Radio Corporation Surface wave acoustic device with compensation for diffraction effects
GB2132844A (en) * 1982-12-22 1984-07-11 Philips Electronic Associated Surface acoustic wave device
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
JPH01164508U (de) * 1988-05-06 1989-11-16
CA2002179C (en) * 1988-11-04 2000-05-23 Richard Vaughan Surface acoustic wave devices
JP3107381B2 (ja) * 1989-05-26 2000-11-06 株式会社日立製作所 弾性表面波デバイス
US5235234A (en) * 1989-05-26 1993-08-10 Hitachi, Ltd. Surface acoustic wave device
JP2847438B2 (ja) * 1991-03-29 1999-01-20 三井金属鉱業株式会社 弾性表面波素子
DE4213800A1 (de) * 1992-04-27 1993-10-28 Siemens Ag Gewichteter Reflektor für eine Oberflächenwellenanordnung
DE4447740B4 (de) * 1993-09-06 2008-10-09 Sanyo Electric Co., Ltd., Moriguchi Akustisches Oberflächenwellenfilter
JP3267276B2 (ja) * 1999-08-25 2002-03-18 株式会社村田製作所 可変インダクタンス素子

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596211A (en) * 1967-11-06 1971-07-27 Zenith Radio Corp Surface-wave filter reflection cancellation
US3662293A (en) * 1971-03-17 1972-05-09 Zenith Radio Corp Acoustic-wave transmitting device
US4060833A (en) * 1976-04-26 1977-11-29 Rca Corporation Transducer arrangement for a surface acoustic wave device to inhibit the generation of multiple reflection signals
US4146851A (en) * 1977-06-23 1979-03-27 Gte Laboratories Incorporated Acoustic surface wave device

Also Published As

Publication number Publication date
US4342011A (en) 1982-07-27
JPS5646318A (en) 1981-04-27
EP0026114A1 (de) 1981-04-01
JPS5937605B2 (ja) 1984-09-11
EP0026114B1 (de) 1989-01-25

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee