JPH0252450B2 - - Google Patents

Info

Publication number
JPH0252450B2
JPH0252450B2 JP58224188A JP22418883A JPH0252450B2 JP H0252450 B2 JPH0252450 B2 JP H0252450B2 JP 58224188 A JP58224188 A JP 58224188A JP 22418883 A JP22418883 A JP 22418883A JP H0252450 B2 JPH0252450 B2 JP H0252450B2
Authority
JP
Japan
Prior art keywords
surface acoustic
acoustic wave
conductance
electrode
unidirectional
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
JP58224188A
Other languages
English (en)
Japanese (ja)
Other versions
JPS60117907A (ja
Inventor
Jun Yamada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP58224188A priority Critical patent/JPS60117907A/ja
Priority to US06/672,205 priority patent/US4602228A/en
Publication of JPS60117907A publication Critical patent/JPS60117907A/ja
Publication of JPH0252450B2 publication Critical patent/JPH0252450B2/ja
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 elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02842—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 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
    • H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
    • H03H9/14505—Unidirectional SAW transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
JP58224188A 1983-11-30 1983-11-30 弾性表面波フィルタ Granted JPS60117907A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP58224188A JPS60117907A (ja) 1983-11-30 1983-11-30 弾性表面波フィルタ
US06/672,205 US4602228A (en) 1983-11-30 1984-11-16 Surface acoustic wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58224188A JPS60117907A (ja) 1983-11-30 1983-11-30 弾性表面波フィルタ

Publications (2)

Publication Number Publication Date
JPS60117907A JPS60117907A (ja) 1985-06-25
JPH0252450B2 true JPH0252450B2 (en]) 1990-11-13

Family

ID=16809898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58224188A Granted JPS60117907A (ja) 1983-11-30 1983-11-30 弾性表面波フィルタ

Country Status (2)

Country Link
US (1) US4602228A (en])
JP (1) JPS60117907A (en])

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4689586A (en) * 1985-06-07 1987-08-25 Hitachi, Ltd. Surface elastic wave device
JP2800893B2 (ja) * 1986-11-21 1998-09-21 株式会社日立製作所 弾性表面波装置
US4818961A (en) * 1987-04-15 1989-04-04 Hitachi, Ltd. Surface acoustic wave filter with capacitive phase shifter
US4918349A (en) * 1987-11-13 1990-04-17 Hitachi, Ltd. Surface acoustic wave device having apodized transducer provided with irregular pitch electrode group
EP0362478B1 (de) * 1988-09-14 1995-05-24 Siemens Aktiengesellschaft Akustische Verzögerungsleitung
US5521565A (en) * 1988-09-28 1996-05-28 Siemens Aktiengesellschaft Surface wave interdigital transducer and surface wave filter with symmetric or predeterminable asymmetric transfer characteristic between input and output
JPH0314305A (ja) * 1989-06-13 1991-01-23 Murata Mfg Co Ltd 弾性表面波装置の製造方法
US5155406A (en) * 1990-02-01 1992-10-13 Motorola, Inc. Multiple nearest neighbor filter bank
US5313177A (en) * 1992-04-06 1994-05-17 Motorola, Inc. Method and apparatus for an acoustic wave filter
DE4330438B4 (de) * 1992-09-09 2010-07-01 Hitachi, Ltd. Oberflächenakustikwelleneinrichtung
US5831492A (en) * 1995-09-15 1998-11-03 Sawtek Inc. Weighted tapered spudt saw device
US5818310A (en) * 1996-08-27 1998-10-06 Sawtek Inc. Series-block and line-width weighted saw filter device
US5831494A (en) * 1996-12-12 1998-11-03 Sawtek Inc. Dual track low-loss reflective saw filter
US7116907B1 (en) * 1998-02-20 2006-10-03 Fujitsu Limited Acousto-optical tunable filters cascaded together
US6459345B1 (en) * 2001-08-08 2002-10-01 The United States Of America As Represented By The Secretary Of The Army Programmable saw filter including unidirectional transducers
US7750752B1 (en) * 2007-06-13 2010-07-06 The United States Of America As Represented By The Secretary Of The Army Programmable SAW filter module
US8238017B2 (en) * 2009-12-18 2012-08-07 Alcatel Lucent Photonic match filter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686518A (en) * 1970-09-02 1972-08-22 Clinton S Hartmann Unidirectional surface wave transducers
US3723919A (en) * 1972-03-20 1973-03-27 Zenith Radio Corp Acoustic surface wave filters with reflection suppression
US3866154A (en) * 1973-12-03 1975-02-11 Westinghouse Electric Corp Broadband unidirectional surface wave transducer
JPS57184316A (en) * 1981-05-08 1982-11-13 Hitachi Ltd Surface acocustic wave device

Also Published As

Publication number Publication date
US4602228A (en) 1986-07-22
JPS60117907A (ja) 1985-06-25

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