CA1024251A - Surface wave transducer with reduced reflection coefficient - Google Patents

Surface wave transducer with reduced reflection coefficient

Info

Publication number
CA1024251A
CA1024251A CA217,634A CA217634A CA1024251A CA 1024251 A CA1024251 A CA 1024251A CA 217634 A CA217634 A CA 217634A CA 1024251 A CA1024251 A CA 1024251A
Authority
CA
Canada
Prior art keywords
surface wave
reflection coefficient
wave transducer
reduced reflection
reduced
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
CA217,634A
Other languages
English (en)
French (fr)
Other versions
CA217634S (en
Inventor
Carmine F. Vasile
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.)
BAE Systems Aerospace Inc
Original Assignee
Hazeltine Corp
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 Hazeltine Corp filed Critical Hazeltine Corp
Application granted granted Critical
Publication of CA1024251A publication Critical patent/CA1024251A/en
Expired 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
    • H03H9/125—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
    • H03H9/14552—Transducers of particular shape or position comprising split fingers
    • 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
    • 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
    • H03H9/14555—Chirped transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
CA217,634A 1974-03-22 1975-01-09 Surface wave transducer with reduced reflection coefficient Expired CA1024251A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US453617A US3870975A (en) 1974-03-22 1974-03-22 Surface wave transducer with reduced reflection coefficient

Publications (1)

Publication Number Publication Date
CA1024251A true CA1024251A (en) 1978-01-10

Family

ID=23801312

Family Applications (1)

Application Number Title Priority Date Filing Date
CA217,634A Expired CA1024251A (en) 1974-03-22 1975-01-09 Surface wave transducer with reduced reflection coefficient

Country Status (4)

Country Link
US (1) US3870975A (OSRAM)
JP (1) JPS5636812B2 (OSRAM)
CA (1) CA1024251A (OSRAM)
GB (1) GB1490883A (OSRAM)

Families Citing this family (11)

* 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
JPS5438743A (en) * 1977-09-01 1979-03-23 Nippon Telegr & Teleph Corp <Ntt> Elastic surface wave chirp filter
JPS5912813Y2 (ja) * 1978-08-28 1984-04-17 東光株式会社 弾性表面波装置の櫛形電極
US4902925A (en) * 1982-07-29 1990-02-20 R.F. Monolithics, Inc. Reflectionless transducer
DE3529916A1 (de) * 1985-08-21 1987-02-26 Siemens Ag Dispersiver interdigital-wandler fuer mit akustischen wellen arbeitenden anordnungen
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
CA2002179C (en) * 1988-11-04 2000-05-23 Richard Vaughan Surface acoustic wave devices
US5264751A (en) * 1989-10-20 1993-11-23 Thomson-Csf Unilateral surface wave transducer
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
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792381A (en) * 1973-02-20 1974-02-12 Hughes Aircraft Co Surface-wave electro-acoustic transducer
US3803520A (en) * 1973-04-26 1974-04-09 Hughes Aircraft Co Acoustic surface wave device with improved transducer

Also Published As

Publication number Publication date
JPS50126407A (OSRAM) 1975-10-04
US3870975A (en) 1975-03-11
JPS5636812B2 (OSRAM) 1981-08-26
GB1490883A (en) 1977-11-02

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