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JPS55123222A - Electromechanical converter for elastic surface wave - Google Patents

Electromechanical converter for elastic surface wave

Info

Publication number
JPS55123222A
JPS55123222A JP3071579A JP3071579A JPS55123222A JP S55123222 A JPS55123222 A JP S55123222A JP 3071579 A JP3071579 A JP 3071579A JP 3071579 A JP3071579 A JP 3071579A JP S55123222 A JPS55123222 A JP S55123222A
Authority
JP
Japan
Prior art keywords
electrodes
side electrode
reference signal
theta
phase
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.)
Granted
Application number
JP3071579A
Other languages
Japanese (ja)
Other versions
JPH0261806B2 (en
Inventor
Kimio Shibayama
Hiroaki Sato
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.)
Nihon Dempa Kogyo Co Ltd
Original Assignee
Nihon Dempa Kogyo Co 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 Nihon Dempa Kogyo Co Ltd filed Critical Nihon Dempa Kogyo Co Ltd
Priority to JP3071579A priority Critical patent/JPS55123222A/en
Publication of JPS55123222A publication Critical patent/JPS55123222A/en
Publication of JPH0261806B2 publication Critical patent/JPH0261806B2/ja
Granted 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
    • H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
    • H03H9/14508—Polyphase SAW transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

PURPOSE:To obtain wide fractional band width by composing a two-phase unidirectional converter of two kinds of comb line electrodes, differing in number, applied with a reference signal and theta deg.-out-of-phase signal respectively. CONSTITUTION:Piezoelectric substrate 11 is provided with common electrode 12, 0 deg.-side electrode 13 applied with a reference signal, and theta deg.-side electrode 14 applied with a signal theta deg. out of phase with the reference signal. Intersecting finger electrodes in electrodes 13 and 14 are so arranged that while inter-center distances are lT and lT', the both will be an integer greater than wavelength lambda0 of an elastic wave. In this arrangement, the number of electrodes of 0 deg.-side electrode 13 should differ from that of theta deg.-side electrode 14. As a result, loss characteristics are greatly improved for substrate with various coupling coefficients, the fractional band width can be widen, and the arrangement of intersecting finger electrodes can be set relatively freely. Consequently, sampling errors can be reduced in weighting and frequency characteristics can be improvided.
JP3071579A 1979-03-16 1979-03-16 Electromechanical converter for elastic surface wave Granted JPS55123222A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3071579A JPS55123222A (en) 1979-03-16 1979-03-16 Electromechanical converter for elastic surface wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3071579A JPS55123222A (en) 1979-03-16 1979-03-16 Electromechanical converter for elastic surface wave

Publications (2)

Publication Number Publication Date
JPS55123222A true JPS55123222A (en) 1980-09-22
JPH0261806B2 JPH0261806B2 (en) 1990-12-21

Family

ID=12311333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3071579A Granted JPS55123222A (en) 1979-03-16 1979-03-16 Electromechanical converter for elastic surface wave

Country Status (1)

Country Link
JP (1) JPS55123222A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065389A2 (en) * 1981-05-08 1982-11-24 Hitachi, Ltd. Surface acoustic wave device
EP0104314A2 (en) * 1982-09-07 1984-04-04 Siemens-Albis Aktiengesellschaft Surface-acoustic wave filter
JPS63131710A (en) * 1986-11-21 1988-06-03 Hitachi Ltd Surface acoustic wave device
JPS63287106A (en) * 1987-05-20 1988-11-24 Hitachi Ltd Surface acoustic wave device
JPS6427306A (en) * 1987-04-15 1989-01-30 Hitachi Ltd Surface acoustic wave filter
US5010269A (en) * 1987-12-14 1991-04-23 Hitachi, Ltd. SAW resonator having a broad bandwidth
US5028831A (en) * 1990-04-04 1991-07-02 Motorola, Inc. SAW reflectionless quarter-wavelength transducers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5120138A (en) * 1990-07-31 1992-06-09 Minnesota Mining And Manufacturing Company Flexible bag closure system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065389A2 (en) * 1981-05-08 1982-11-24 Hitachi, Ltd. Surface acoustic wave device
EP0104314A2 (en) * 1982-09-07 1984-04-04 Siemens-Albis Aktiengesellschaft Surface-acoustic wave filter
JPS5964910A (en) * 1982-09-07 1984-04-13 シ−メンスアルビス・アクチエンゲゼルシヤフト Surface wave filter
JPS63131710A (en) * 1986-11-21 1988-06-03 Hitachi Ltd Surface acoustic wave device
JPS6427306A (en) * 1987-04-15 1989-01-30 Hitachi Ltd Surface acoustic wave filter
JPS63287106A (en) * 1987-05-20 1988-11-24 Hitachi Ltd Surface acoustic wave device
US5010269A (en) * 1987-12-14 1991-04-23 Hitachi, Ltd. SAW resonator having a broad bandwidth
US5028831A (en) * 1990-04-04 1991-07-02 Motorola, Inc. SAW reflectionless quarter-wavelength transducers

Also Published As

Publication number Publication date
JPH0261806B2 (en) 1990-12-21

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