GB1361912A - Electro-mechanical frequency-dependent surface-wave structures - Google Patents

Electro-mechanical frequency-dependent surface-wave structures

Info

Publication number
GB1361912A
GB1361912A GB2947572A GB2947572A GB1361912A GB 1361912 A GB1361912 A GB 1361912A GB 2947572 A GB2947572 A GB 2947572A GB 2947572 A GB2947572 A GB 2947572A GB 1361912 A GB1361912 A GB 1361912A
Authority
GB
United Kingdom
Prior art keywords
plate
ceramic
electro
piezo
june
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
GB2947572A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1361912A publication Critical patent/GB1361912A/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 devices; 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 devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02614—Treatment of substrates, e.g. curved, spherical, cylindrical substrates ensuring closed round-about circuits for the acoustical waves
    • H03H9/02629—Treatment of substrates, e.g. curved, spherical, cylindrical substrates ensuring closed round-about circuits for the acoustical waves of the edges

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

1361912 Acoustic surface wave devices SIEMENS AG 23 June 1972 [25 June 1971] 29475/72 Heading H3U In an acoustic surface wave delay line or filter comprising on a piezo-electric crystal, or piezo-ceramic plate (1), Fig. 1 (not shown), polarized in the thickness direction transducers (2, 3; 4, 5) of a chromium-nickel-gold combination, edges of the plate 1 are provided with recesses 10 causing diffused reflection of surface waves which impinge on them. In Fig. 5 (not shown), the performance of a device on plate 1, Fig. 4, is compared with a recess-free plate. The plate, if ceramic, is a lead ceramic containing neodymium. The recesses may have planar, for example, sawtooth, or curved faces, or a waveshaped face.
GB2947572A 1971-06-25 1972-06-23 Electro-mechanical frequency-dependent surface-wave structures Expired GB1361912A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712131614 DE2131614A1 (en) 1971-06-25 1971-06-25 Functional element based on the surface wave principle, in particular frequency filter or ultrasonic delay line

Publications (1)

Publication Number Publication Date
GB1361912A true GB1361912A (en) 1974-07-30

Family

ID=5811794

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2947572A Expired GB1361912A (en) 1971-06-25 1972-06-23 Electro-mechanical frequency-dependent surface-wave structures

Country Status (6)

Country Link
BE (1) BE785364A (en)
DE (1) DE2131614A1 (en)
FR (1) FR2143368B1 (en)
GB (1) GB1361912A (en)
IT (1) IT956738B (en)
NL (1) NL7208444A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109420961A (en) * 2017-08-22 2019-03-05 株式会社迪思科 Cutting apparatus and slot detection method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51105252A (en) * 1975-03-13 1976-09-17 Asahi Glass Co Ltd Choonpakotaichensen oyobi sonoseizoho
JPS5333557A (en) * 1976-08-24 1978-03-29 Toshiba Corp Elastic surface wave element
WO1992017937A1 (en) * 1991-03-28 1992-10-15 Siemens Aktiengesellschaft Surface-wave device with a feature designed to avoid acoustic-wave interference

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109420961A (en) * 2017-08-22 2019-03-05 株式会社迪思科 Cutting apparatus and slot detection method

Also Published As

Publication number Publication date
BE785364A (en) 1972-10-16
IT956738B (en) 1973-10-10
NL7208444A (en) 1972-12-28
DE2131614A1 (en) 1972-12-28
FR2143368B1 (en) 1973-07-13
FR2143368A1 (en) 1973-02-02

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee