ATE69917T1 - Akustische oberflaechenwellenanordnungen mit fingern zur unterdrueckung von reflexionen. - Google Patents

Akustische oberflaechenwellenanordnungen mit fingern zur unterdrueckung von reflexionen.

Info

Publication number
ATE69917T1
ATE69917T1 AT86301277T AT86301277T ATE69917T1 AT E69917 T1 ATE69917 T1 AT E69917T1 AT 86301277 T AT86301277 T AT 86301277T AT 86301277 T AT86301277 T AT 86301277T AT E69917 T1 ATE69917 T1 AT E69917T1
Authority
AT
Austria
Prior art keywords
idt
back edge
saw
acoustic wave
surface acoustic
Prior art date
Application number
AT86301277T
Other languages
English (en)
Inventor
Mark Spencer Suthers
Grantley Oliver Este
Richard William Streater
Blair Kenneth Maclaurin
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Application granted granted Critical
Publication of ATE69917T1 publication Critical patent/ATE69917T1/de

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

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Aerials With Secondary Devices (AREA)
  • Golf Clubs (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)
AT86301277T 1985-03-29 1986-02-21 Akustische oberflaechenwellenanordnungen mit fingern zur unterdrueckung von reflexionen. ATE69917T1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA000477948A CA1254994A (en) 1985-03-29 1985-03-29 Saw devices with reflection-suppressing fingers
EP86301277A EP0197640B2 (de) 1985-03-29 1986-02-21 Akustische Oberflächenwellenanordnungen mit Fingern zur Unterdrückung von Reflexionen

Publications (1)

Publication Number Publication Date
ATE69917T1 true ATE69917T1 (de) 1991-12-15

Family

ID=4130152

Family Applications (1)

Application Number Title Priority Date Filing Date
AT86301277T ATE69917T1 (de) 1985-03-29 1986-02-21 Akustische oberflaechenwellenanordnungen mit fingern zur unterdrueckung von reflexionen.

Country Status (7)

Country Link
US (1) US4642507A (de)
EP (1) EP0197640B2 (de)
JP (1) JPS61227418A (de)
AT (1) ATE69917T1 (de)
AU (1) AU576417B2 (de)
CA (1) CA1254994A (de)
DE (1) DE3682605D1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4814658A (en) * 1986-11-10 1989-03-21 Northern Telecom Limited SAW device with continuous finger pattern
US4870312A (en) * 1987-02-19 1989-09-26 Hazeltine Corporation Surface wave device having anti-reflective shield
DE3731309A1 (de) * 1987-09-17 1989-03-30 Siemens Ag Oberflaechenwellenanordnung mit konversionsstruktur zur vermeidung unerwuenschter reflektierter wellen
US4931752A (en) * 1987-09-30 1990-06-05 Hewlett-Packard Company Polyimide damper for surface acoustic wave device
US5274345A (en) * 1992-05-13 1993-12-28 Andersen Laboratories Dual function reflector structures for interdigital saw transducer
JP3330512B2 (ja) * 1997-04-17 2002-09-30 株式会社日立製作所 弾性表面波素子
JP4184220B2 (ja) * 2003-10-01 2008-11-19 富士通メディアデバイス株式会社 弾性表面波デバイス
US11722116B2 (en) 2019-11-25 2023-08-08 The Board Of Trustees Of The University Of Illinois Acoustic resonators and filters that support fifth generation (5G) wireless communications standards

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1499330A (en) * 1974-09-26 1978-02-01 Plessey Co Ltd Acoustic surface wave filters
JPS5333557A (en) * 1976-08-24 1978-03-29 Toshiba Corp Elastic surface wave element
US4096455A (en) * 1977-02-23 1978-06-20 Tektronix, Inc. Surface wave termination for saw device
JPS547257A (en) * 1977-06-20 1979-01-19 Hitachi Ltd Elastic surface wave device
JPS5412661A (en) * 1977-06-30 1979-01-30 Toshiba Corp Elastic surface wave element
JPS5945286B2 (ja) * 1977-09-05 1984-11-05 松下電器産業株式会社 弾性表面波先振器用素子
US4206380A (en) * 1978-12-22 1980-06-03 Hitachi, Ltd. Piezoelectric surface acoustic wave device with suppression of reflected signals
JPS5693414A (en) * 1979-12-27 1981-07-29 Fujitsu Ltd Elastic surface wave element
JPS56122215A (en) * 1980-02-29 1981-09-25 Nec Corp Reed screen type electrode
GB2090093A (en) * 1980-12-19 1982-06-30 Philips Electronic Associated Acoustic wave devices
DE3208252A1 (de) * 1982-03-08 1983-09-15 Siemens AG, 1000 Berlin und 8000 München Interdigitalwandler mit unterdrueckung reflektierter stoersignale
CA1252557A (en) * 1985-03-29 1989-04-11 Grantley O. Este Saw devices including resistive films

Also Published As

Publication number Publication date
EP0197640B1 (de) 1991-11-27
JPS61227418A (ja) 1986-10-09
EP0197640B2 (de) 1996-12-11
EP0197640A3 (en) 1987-12-16
EP0197640A2 (de) 1986-10-15
CA1254994A (en) 1989-05-30
AU576417B2 (en) 1988-08-25
US4642507A (en) 1987-02-10
DE3682605D1 (de) 1992-01-09
AU5444186A (en) 1986-10-02

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Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties