GB1396539A - Surface wave electromechanical filter - Google Patents

Surface wave electromechanical filter

Info

Publication number
GB1396539A
GB1396539A GB3320272A GB3320272A GB1396539A GB 1396539 A GB1396539 A GB 1396539A GB 3320272 A GB3320272 A GB 3320272A GB 3320272 A GB3320272 A GB 3320272A GB 1396539 A GB1396539 A GB 1396539A
Authority
GB
United Kingdom
Prior art keywords
surface wave
input
july
transfer function
overlapping portions
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
GB3320272A
Other languages
English (en)
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.)
GHOMSON CSF
Original Assignee
GHOMSON CSF
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 GHOMSON CSF filed Critical GHOMSON CSF
Publication of GB1396539A publication Critical patent/GB1396539A/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
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6423—Means for obtaining a particular transfer characteristic
    • H03H9/6426—Combinations of the characteristics of different 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
    • H03H9/02—Details
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14517—Means for weighting
    • H03H9/1452—Means for weighting by finger overlap length, apodisation

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
GB3320272A 1971-07-16 1972-07-14 Surface wave electromechanical filter Expired GB1396539A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7126189A FR2146541A5 (enExample) 1971-07-16 1971-07-16

Publications (1)

Publication Number Publication Date
GB1396539A true GB1396539A (en) 1975-06-04

Family

ID=9080498

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3320272A Expired GB1396539A (en) 1971-07-16 1972-07-14 Surface wave electromechanical filter

Country Status (5)

Country Link
US (1) US3813618A (enExample)
DE (1) DE2234693C2 (enExample)
FR (1) FR2146541A5 (enExample)
GB (1) GB1396539A (enExample)
NL (1) NL7209678A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117593A (en) * 1982-03-31 1983-10-12 Marconi Co Ltd Adjusting the frequency response of surface acoustic wave devices

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53136938A (en) * 1977-05-06 1978-11-29 Fujitsu Ltd Elastic surface wave filter
US4328497A (en) * 1980-08-11 1982-05-04 Westinghouse Electric Corp. Method and system for jamming analysis and transmission selection
DE3121516A1 (de) 1981-05-29 1983-01-05 Siemens AG, 1000 Berlin und 8000 München Pulskompressionsfilter nach art einer dispersiven verzoegerungsleitung
DE3209962A1 (de) * 1982-03-18 1983-09-29 Siemens AG, 1000 Berlin und 8000 München Mit akustischen wellen arbeitendes elektronisches bauelement
US4577169A (en) * 1984-08-01 1986-03-18 At&T Bell Laboratories Small ripple surface acoustic wave filter with low insertion loss
JP2725697B2 (ja) * 1984-12-14 1998-03-11 株式会社 日立製作所 弾性表面波装置
JPS62115A (ja) * 1985-02-25 1987-01-06 Oki Electric Ind Co Ltd 弾性表面波フイルタ
US4825467A (en) * 1986-11-25 1989-04-25 International Telesystems, Inc. Restricted access television transmission system
JP2870751B2 (ja) * 1987-02-13 1999-03-17 株式会社東芝 弾性表面波フィルタ
US7656253B2 (en) * 2007-04-18 2010-02-02 Northrop Grumman Space & Mission Systems Corporation Surface acoustic wave passband control

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3401360A (en) * 1963-07-19 1968-09-10 Bell Telephone Labor Inc Phased transducer arrays for elastic wave transmission
US3376572A (en) * 1966-09-15 1968-04-02 Rca Corp Electroacoustic wave shaping device
US3479572A (en) * 1967-07-06 1969-11-18 Litton Precision Prod Inc Acoustic surface wave device
FR2036374A5 (enExample) * 1969-03-12 1970-12-24 Thomson Csf
US3582540A (en) * 1969-04-17 1971-06-01 Zenith Radio Corp Signal translating apparatus using surface wave acoustic device
US3550045A (en) * 1969-06-25 1970-12-22 Zenith Radio Corp Acoustic surface wave filter devices
US3699364A (en) * 1971-06-04 1972-10-17 Hughes Aircraft Co Acoustic surface wave device having improved transducer structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117593A (en) * 1982-03-31 1983-10-12 Marconi Co Ltd Adjusting the frequency response of surface acoustic wave devices
US4504758A (en) * 1982-03-31 1985-03-12 The Marconi Company Limited Surface acoustic wave devices having frequency response that can be adjusted

Also Published As

Publication number Publication date
DE2234693A1 (de) 1973-01-25
NL7209678A (enExample) 1973-01-18
FR2146541A5 (enExample) 1973-03-02
DE2234693C2 (de) 1985-08-22
US3813618A (en) 1974-05-28

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee