DE3684026D1 - Akustischer oberflaechenwellenresonator. - Google Patents

Akustischer oberflaechenwellenresonator.

Info

Publication number
DE3684026D1
DE3684026D1 DE8686104081T DE3684026T DE3684026D1 DE 3684026 D1 DE3684026 D1 DE 3684026D1 DE 8686104081 T DE8686104081 T DE 8686104081T DE 3684026 T DE3684026 T DE 3684026T DE 3684026 D1 DE3684026 D1 DE 3684026D1
Authority
DE
Germany
Prior art keywords
surface wave
wave resonator
acoustic surface
acoustic
resonator
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 - Lifetime
Application number
DE8686104081T
Other languages
English (en)
Inventor
Mitsutaka Hikita
Atsushi Sumioka
Yoshikatu Ishida
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 Denshi KK
Hitachi Ltd
Original Assignee
Hitachi Denshi KK
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 Denshi KK, Hitachi Ltd filed Critical Hitachi Denshi KK
Application granted granted Critical
Publication of DE3684026D1 publication Critical patent/DE3684026D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6423—Means for obtaining a particular transfer characteristic
    • H03H9/6433—Coupled resonator filters
    • H03H9/6479—Capacitively coupled SAW resonator filters
    • 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
    • H03H9/14544—Transducers of particular shape or position
    • H03H9/1455—Transducers of particular shape or position constituted of N parallel or series transducers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/25—Constructional features of resonators using surface acoustic waves
    • 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
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6423—Means for obtaining a particular transfer characteristic
    • H03H9/6433—Coupled resonator filters
    • H03H9/644—Coupled resonator filters having two acoustic tracks
    • H03H9/6456—Coupled resonator filters having two acoustic tracks being electrically coupled
    • H03H9/6459—Coupled resonator filters having two acoustic tracks being electrically coupled via one connecting electrode
    • H03H9/6463—Coupled resonator filters having two acoustic tracks being electrically coupled via one connecting electrode the tracks being electrically cascaded

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
DE8686104081T 1985-03-27 1986-03-25 Akustischer oberflaechenwellenresonator. Expired - Lifetime DE3684026D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60060645A JPH0697727B2 (ja) 1985-03-27 1985-03-27 弾性表面波フィルタ

Publications (1)

Publication Number Publication Date
DE3684026D1 true DE3684026D1 (de) 1992-04-09

Family

ID=13148268

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686104081T Expired - Lifetime DE3684026D1 (de) 1985-03-27 1986-03-25 Akustischer oberflaechenwellenresonator.

Country Status (4)

Country Link
US (1) US4734664A (de)
EP (1) EP0196063B1 (de)
JP (1) JPH0697727B2 (de)
DE (1) DE3684026D1 (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63132515A (ja) * 1986-11-25 1988-06-04 Hitachi Ltd 弾性表面波複合フイルタ
JPS6423612A (en) * 1987-07-20 1989-01-26 Hitachi Ltd Elastic surface wave device
JPH01260911A (ja) * 1988-04-11 1989-10-18 Hitachi Ltd 弾性表面波共振器複合形フィルタ
JPH0468907A (ja) * 1990-07-09 1992-03-04 Kinseki Ltd 周波数変換回路
US5223762A (en) * 1990-12-27 1993-06-29 Murata Manufacturing Co., Ltd. Surface acoustic wave filter
JP2800905B2 (ja) * 1991-10-28 1998-09-21 富士通株式会社 弾性表面波フィルタ
USRE40036E1 (en) 1991-10-28 2008-01-29 Fujitsu Limited Surface acoustic wave filter
US5309126A (en) * 1991-11-18 1994-05-03 Motorola, Inc. Spatially varying multiple electrode acoustic wave filter and method therefor
CA2069369C (en) * 1992-05-25 1995-12-05 Robert C. Peach Filterbank using surface acoustic wave technology
JPH066111A (ja) * 1992-06-18 1994-01-14 Mitsubishi Electric Corp 複合デュプレックスフィルタ
JP3189508B2 (ja) * 1993-07-08 2001-07-16 株式会社村田製作所 弾性表面波フィルタ
JP3139225B2 (ja) * 1993-07-08 2001-02-26 株式会社村田製作所 弾性表面波フィルタ
EP0652637B1 (de) * 1993-11-05 1998-08-12 Matsushita Electric Industrial Co., Ltd. Akustisches Oberflächenwellenfilter
US5600287A (en) * 1994-02-03 1997-02-04 Motorola, Inc. Acoustic wave filter with reduced bulk-wave scattering loss, ladder filter incorporating same and method
US5471178A (en) * 1994-02-03 1995-11-28 Motorola, Inc. Ladder filter and method for producing conjugately matched impedance
US5499002A (en) * 1994-04-28 1996-03-12 Kinsman; Robert G. Resonator filter utilizing cascaded impedance inverters
US5955933A (en) 1994-11-10 1999-09-21 Fujitsu Limited Saw resonator with improved connections
GB2296614B (en) * 1994-12-23 1999-09-15 Advanced Saw Prod Sa Saw filter
US5635883A (en) * 1995-08-28 1997-06-03 Motorola, Inc. Acoustic wave filter with filter-shaping element and method
WO1999065141A1 (fr) * 1998-06-12 1999-12-16 Matsushita Electric Industrial Co., Ltd. Filtre a ondes de surface, et dispositif partage pour une antenne
FI113111B (fi) * 2000-11-24 2004-02-27 Nokia Corp Pietsosähköisiä resonaattoreita käsittävä suodinrakenne ja järjestely
US8005448B1 (en) * 2007-05-10 2011-08-23 Rf Micro Devices, Inc. Radio frequency duplex filter for removing transmit signals from a receive path

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4126837A (en) * 1974-07-01 1978-11-21 Nippon Telegraph And Telephone Public Corporation Impedance element and band-rejection filter using the same
US4166258A (en) * 1974-08-29 1979-08-28 International Business Machines Corporation Thin-film integrated circuit with tank circuit characteristics and applications to thin-film filters and oscillators
JPS53145595A (en) * 1977-05-25 1978-12-18 Nippon Telegr & Teleph Corp <Ntt> Elastic surface wave oscillator
DE2950896A1 (de) * 1979-12-18 1981-06-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schmalbandiges oberflaechenwellenfilter
JPS5733817A (en) * 1980-08-07 1982-02-24 Clarion Co Ltd Saw element mount structure
JPS581317A (ja) * 1981-06-25 1983-01-06 Maruyasu Kogyo Kk 弾性表面波フイルタ装置
JPS581850A (ja) * 1981-06-25 1983-01-07 Ricoh Co Ltd フロツピ−デイスクドライブ装置
US4405874A (en) * 1982-03-01 1983-09-20 Northern Telecom Limited Surface acoustic wave (saw) devices having series-connected inter-digital transducers
US4625184A (en) * 1982-07-02 1986-11-25 Clarion Co., Ltd. Surface acoustic wave device with impedance matching network formed thereon
JPS6094520A (ja) * 1983-10-28 1985-05-27 Fujitsu Ltd 弾性表面波共振器

Also Published As

Publication number Publication date
EP0196063A3 (en) 1987-12-23
JPH0697727B2 (ja) 1994-11-30
EP0196063B1 (de) 1992-03-04
US4734664A (en) 1988-03-29
EP0196063A2 (de) 1986-10-01
JPS61220511A (ja) 1986-09-30

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition