JPH026451B2 - - Google Patents

Info

Publication number
JPH026451B2
JPH026451B2 JP56206816A JP20681681A JPH026451B2 JP H026451 B2 JPH026451 B2 JP H026451B2 JP 56206816 A JP56206816 A JP 56206816A JP 20681681 A JP20681681 A JP 20681681A JP H026451 B2 JPH026451 B2 JP H026451B2
Authority
JP
Japan
Prior art keywords
resonator
transducer
subdevices
saw
parallel
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
JP56206816A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57127319A (en
Inventor
Sutanrei Kurosu Piitaa
Robaato Shirebu Uiriamu
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.)
Hewlett Packard Japan Inc
Original Assignee
Yokogawa Hewlett Packard 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 Yokogawa Hewlett Packard Ltd filed Critical Yokogawa Hewlett Packard Ltd
Publication of JPS57127319A publication Critical patent/JPS57127319A/ja
Publication of JPH026451B2 publication Critical patent/JPH026451B2/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
    • H03H9/46—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
    • H03H9/6443—Coupled resonator filters having two acoustic tracks being acoustically coupled
    • H03H9/645—Coupled resonator filters having two acoustic tracks being acoustically coupled by grating reflectors overlapping both tracks
    • 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
    • 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
    • H03H9/14544—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 elements; 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 elements; 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/46—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
    • H03H9/6469—Coupled resonator filters having two acoustic tracks being electrically coupled via two connecting electrodes

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
JP56206816A 1980-12-22 1981-12-21 Surface acoustic wave resonator Granted JPS57127319A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/218,894 US4331943A (en) 1980-12-22 1980-12-22 Acoustic wave devices having transverse mode distortions eliminated structurally

Publications (2)

Publication Number Publication Date
JPS57127319A JPS57127319A (en) 1982-08-07
JPH026451B2 true JPH026451B2 (en]) 1990-02-09

Family

ID=22816919

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56206816A Granted JPS57127319A (en) 1980-12-22 1981-12-21 Surface acoustic wave resonator

Country Status (4)

Country Link
US (1) US4331943A (en])
EP (1) EP0054723B1 (en])
JP (1) JPS57127319A (en])
DE (1) DE3168823D1 (en])

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117992B (en) * 1982-03-24 1985-09-18 Philips Electronic Associated Parallel-series acoustic wave device arrangement
JPS587911A (ja) * 1982-06-17 1983-01-17 Toshiba Corp 弾性表面波共振子装置
USRE33957E (en) * 1982-07-26 1992-06-09 Toyo Communication Equipment Co., Ltd. High frequency narrow-band multi-mode filter
JPS5936412A (ja) * 1982-08-23 1984-02-28 Toyo Commun Equip Co Ltd 反射器を備えたｉｄｔ型共振器又は多重モ−ド・フイルタの電極構造
JPS59159025U (ja) * 1983-04-08 1984-10-25 株式会社村田製作所 表面波装置
GB2149253A (en) * 1983-10-31 1985-06-05 Philips Electronic Associated Surface acoustic wave device
JPS60124110A (ja) * 1983-12-08 1985-07-03 Alps Electric Co Ltd 弾性表面波素子
US4933588A (en) * 1988-12-23 1990-06-12 Raytheon Company Higher order transverse mode suppression in surface acoustic wave resonators
JP2632407B2 (ja) * 1989-02-14 1997-07-23 国際電気株式会社 単一モード２端子対弾性表面波共振子
DE4018784A1 (de) * 1990-06-12 1991-12-19 Siemens Ag Oberflaechenwellen-reflektorfilter
ATE113425T1 (de) * 1989-11-14 1994-11-15 Siemens Ag Oberflächenwellen-reflektorfilter.
DE19638455A1 (de) 1996-09-19 1998-04-02 Siemens Matsushita Components Twin-Dualmode-Filter
US6384698B1 (en) * 1999-04-28 2002-05-07 Seiko Epson Corporation Transverse double mode saw filter
CN1199352C (zh) * 2000-06-27 2005-04-27 株式会社东芝 声表面波元件
US20060094988A1 (en) * 2004-10-28 2006-05-04 Tosaya Carol A Ultrasonic apparatus and method for treating obesity or fat-deposits or for delivering cosmetic or other bodily therapy
DE112014004077B4 (de) * 2013-09-06 2018-11-22 Murata Manufacturing Co., Ltd. Resonator für elastische Wellen, Filtervorrichtungfür elastische Wellen, und Duplexer

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886504A (en) * 1974-05-20 1975-05-27 Texas Instruments Inc Acoustic surface wave resonator devices
GB1490959A (en) * 1976-02-16 1977-11-09 Mullard Ltd Electrical oscillators
US4060777A (en) * 1976-05-19 1977-11-29 Piezo Technology Inc. Guided elastic surface wave filter
US4144507A (en) * 1976-09-29 1979-03-13 Texas Instruments Incorporated Surface acoustic wave resonator incorporating coupling transducer into reflecting arrays
GB1554366A (en) * 1977-02-04 1979-10-17 Philips Electronic Associated Acoustic surface wave devices
JPS53145595A (en) * 1977-05-25 1978-12-18 Nippon Telegr & Teleph Corp <Ntt> Elastic surface wave oscillator
GB2033185B (en) * 1978-09-22 1983-05-18 Secr Defence Acoustic wave device with temperature stabilisation
GB2030407B (en) * 1978-09-22 1982-12-08 Philips Electronic Associated Acustic wave resonators and filters
FR2437686A1 (fr) * 1978-09-29 1980-04-25 Mayer Ferdy Element electrique a pertes, tel que fil, cable et ecran, resistant et absorbant

Also Published As

Publication number Publication date
EP0054723B1 (de) 1985-02-06
US4331943A (en) 1982-05-25
JPS57127319A (en) 1982-08-07
EP0054723A1 (de) 1982-06-30
DE3168823D1 (en) 1985-03-21

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