DE3484786D1 - Akustischer wandler. - Google Patents

Akustischer wandler.

Info

Publication number
DE3484786D1
DE3484786D1 DE8484306956T DE3484786T DE3484786D1 DE 3484786 D1 DE3484786 D1 DE 3484786D1 DE 8484306956 T DE8484306956 T DE 8484306956T DE 3484786 T DE3484786 T DE 3484786T DE 3484786 D1 DE3484786 D1 DE 3484786D1
Authority
DE
Germany
Prior art keywords
acoustic converter
acoustic
converter
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
DE8484306956T
Other languages
English (en)
Inventor
Meirion Francis Lewis
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10550198&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3484786(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Application granted granted Critical
Publication of DE3484786D1 publication Critical patent/DE3484786D1/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
    • H03H9/643—Means for obtaining a particular transfer characteristic the transfer characteristic being determined by reflective or coupling array characteristics
    • 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
    • H03H9/02685—Grating lines having particular arrangements
    • H03H9/0274—Intra-transducers grating lines
    • 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
    • H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
    • H03H9/14505—Unidirectional SAW transducers
DE8484306956T 1983-10-14 1984-10-11 Akustischer wandler. Expired - Lifetime DE3484786D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB838327551A GB8327551D0 (en) 1983-10-14 1983-10-14 Acoustic transducer

Publications (1)

Publication Number Publication Date
DE3484786D1 true DE3484786D1 (de) 1991-08-14

Family

ID=10550198

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484306956T Expired - Lifetime DE3484786D1 (de) 1983-10-14 1984-10-11 Akustischer wandler.

Country Status (5)

Country Link
US (1) US4642506A (de)
EP (1) EP0140618B1 (de)
JP (4) JPH0736501B2 (de)
DE (1) DE3484786D1 (de)
GB (1) GB8327551D0 (de)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4870312A (en) * 1987-02-19 1989-09-26 Hazeltine Corporation Surface wave device having anti-reflective shield
JPH01157109A (ja) * 1987-12-14 1989-06-20 Hitachi Ltd 弾性表面波共振器
US5023605A (en) * 1988-11-25 1991-06-11 Gte Laboratories, Inc. Patterned transducer apparatus for correcting spurious signals in said devices
US4945354A (en) * 1988-11-25 1990-07-31 Gte Products Spurious signal correction for surface acoustic wave (SAW) security devices
FR2653632B1 (fr) * 1989-10-20 1991-12-20 Thomson Csf Transducteur d'ondes de surface unidirectionnel.
US5264751A (en) * 1989-10-20 1993-11-23 Thomson-Csf Unilateral surface wave transducer
GB2259818B (en) * 1991-09-17 1995-08-16 Racal Mesl Ltd Surface acoustic wave (saw) ladder transducer
US5313177A (en) * 1992-04-06 1994-05-17 Motorola, Inc. Method and apparatus for an acoustic wave filter
US5274345A (en) * 1992-05-13 1993-12-28 Andersen Laboratories Dual function reflector structures for interdigital saw transducer
JPH06260873A (ja) * 1993-03-03 1994-09-16 Kazuhiko Yamanouchi 弾性表面波フィルタ装置
FR2702899B1 (fr) † 1993-03-19 1995-05-12 Thomson Csf Transducteur à ondes de surface à réflexion acoustique distribuée et filtre comportant un tel transducteur.
JP3307455B2 (ja) * 1993-03-22 2002-07-24 日本碍子株式会社 弾性表面波フィルタ装置
JPH0722889A (ja) * 1993-06-30 1995-01-24 Nec Corp 弾性表面波変換器
US5325704A (en) * 1993-11-22 1994-07-05 The United States Of America As Represented By The Secretary Of The Army Surface acoustic wave (SAW) chemical multi-sensor array
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
JP3484237B2 (ja) * 1994-09-28 2004-01-06 日本碍子株式会社 弾性表面波デバイス
US5663695A (en) * 1994-10-31 1997-09-02 Ngk Insulators, Ltd. Surface acoustic wave filter device and transducer therefor
JP3268179B2 (ja) * 1995-11-08 2002-03-25 正男 竹内 弾性表面波変換器及びこの変換器を用いた弾性表面波フィルタ
US6172582B1 (en) 1996-02-20 2001-01-09 Cts Corporation Saw resonator and ladder filter with specified number of reflector electrode fingers
JPH10135765A (ja) * 1996-10-30 1998-05-22 Nec Corp 一方向性弾性表面波フィルタ
NO985386L (no) * 1997-11-20 1999-05-21 Murata Manufacturing Co Unidireksjonal transduktor for akustiske overflateb°lger, og transversalfilter med slik transduktor
JP3266846B2 (ja) * 1998-01-20 2002-03-18 東洋通信機株式会社 反射反転型弾性表面波変換器及びフィルタ
JP3695353B2 (ja) 2000-11-17 2005-09-14 株式会社村田製作所 トランスバーサル型弾性表面波フィルタ
DE10111959B4 (de) * 2001-03-13 2014-11-20 Epcos Ag Mit akustischen Wellen arbeitende Wandlerstruktur
US6534896B2 (en) * 2001-05-15 2003-03-18 Nortel Networks Limited Spatial harmonic transducers for surface wave devices
JP4765396B2 (ja) * 2005-05-12 2011-09-07 エプソントヨコム株式会社 トランスバーサル型弾性表面波フィルタ
US7952482B2 (en) * 2005-08-25 2011-05-31 University Of Central Florida Research Foundation, Inc. Surface acoustic wave coding for orthogonal frequency coded devices
JP4548305B2 (ja) * 2005-10-31 2010-09-22 エプソントヨコム株式会社 二重モード弾性表面波フィルタ
FR2917918B1 (fr) * 2007-06-19 2010-03-12 Senseor Resonateur a ondes de surface a resonance parasite reduite
US9128567B2 (en) * 2012-11-20 2015-09-08 Elo Touch Solutions, Inc. Segmented waveguide core touch sensor systems and methods
US11353567B2 (en) * 2019-02-22 2022-06-07 Semiconductor Components Industries, Llc Ultrasonic sensor having edge-based echo detection

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866154A (en) * 1973-12-03 1975-02-11 Westinghouse Electric Corp Broadband unidirectional surface wave transducer
JPS5715519A (en) * 1980-07-01 1982-01-26 Matsushita Electric Ind Co Ltd Elastic surface wave device
JPS5738017A (en) * 1980-08-18 1982-03-02 Fujitsu General Ltd Unidirectional saw energizing device
US4353046A (en) * 1980-11-04 1982-10-05 R F Monolithics, Inc. Surface acoustic wave device with reflectors
US4384228A (en) * 1980-12-18 1983-05-17 Hewlett-Packard Company Acousto-electric transducer
JPS57103420A (en) * 1980-12-18 1982-06-28 Toko Inc Grouped unidirectional surface acoustic wave transducer
DE3267639D1 (en) * 1981-02-04 1986-01-09 Matsushita Electric Ind Co Ltd Surface acoustic wave device
JPS57129510A (en) * 1981-02-04 1982-08-11 Matsushita Electric Ind Co Ltd Surface acoustic wave device
JPS57184316A (en) * 1981-05-08 1982-11-13 Hitachi Ltd Surface acocustic wave device
JPS5935204A (ja) * 1982-08-23 1984-02-25 Fanuc Ltd 誤差補正装置

Also Published As

Publication number Publication date
JPH0697756A (ja) 1994-04-08
EP0140618A3 (en) 1986-03-12
JPH09107261A (ja) 1997-04-22
JP2000059170A (ja) 2000-02-25
JPS60123123A (ja) 1985-07-01
JP2984523B2 (ja) 1999-11-29
JPH0736501B2 (ja) 1995-04-19
US4642506A (en) 1987-02-10
JP3345609B2 (ja) 2002-11-18
EP0140618A2 (de) 1985-05-08
EP0140618B1 (de) 1991-07-10
GB8327551D0 (en) 1983-11-16

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition