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JPS5469359A - Elastic surface wave element - Google Patents

Elastic surface wave element

Info

Publication number
JPS5469359A
JPS5469359A JP13641977A JP13641977A JPS5469359A JP S5469359 A JPS5469359 A JP S5469359A JP 13641977 A JP13641977 A JP 13641977A JP 13641977 A JP13641977 A JP 13641977A JP S5469359 A JPS5469359 A JP S5469359A
Authority
JP
Japan
Prior art keywords
wave
electrode
reflected
theta
incident
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
JP13641977A
Other languages
Japanese (ja)
Other versions
JPS5740685B2 (en
Inventor
Kozo Machida
Masanobu Shibuya
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP13641977A priority Critical patent/JPS5469359A/en
Publication of JPS5469359A publication Critical patent/JPS5469359A/en
Publication of JPS5740685B2 publication Critical patent/JPS5740685B2/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
    • H03H9/02535—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
    • H03H9/14547—Fan shaped; Tilted; Shifted; Slanted; Tapered; Arched; Stepped finger transducers

Landscapes

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

Abstract

PURPOSE:To improve a multiple reflecting level considerably (about 10dB) by forming the auxiliary electrode for phase speed correction unequally against the main electrode. CONSTITUTION:Main electrode b has the same constitution with usual split electrode and auxiliary electrode C is formed with an angle 90 deg.+ or -theta against coupling elements a1 and a2 and with an angle theta against main electrode b. It is allowed that theta takes either such an angle as 0 deg.-theta against the incident wave (case (a) ) or such one as 90 deg.+theta against the incident one (case (b) ). In other words, the reflection of the wave upon electrode C is divided into either in the inner direction or in the outer direction. And reflected wave D', which will be reflected by incident wave D1 to main electrode b becomes to be parallel to incident wave D1, while reflected wave D2' which will be reflected by incident wave D2 to electrode c takes an angle theta against incident wave D2 and, as the result, reflected wave D2' does not pass the same path as reflected wave D2 does, resulting in no parpendicular incidence to the mutually faced sending electrodes or received electrodes.
JP13641977A 1977-11-14 1977-11-14 Elastic surface wave element Granted JPS5469359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13641977A JPS5469359A (en) 1977-11-14 1977-11-14 Elastic surface wave element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13641977A JPS5469359A (en) 1977-11-14 1977-11-14 Elastic surface wave element

Publications (2)

Publication Number Publication Date
JPS5469359A true JPS5469359A (en) 1979-06-04
JPS5740685B2 JPS5740685B2 (en) 1982-08-30

Family

ID=15174707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13641977A Granted JPS5469359A (en) 1977-11-14 1977-11-14 Elastic surface wave element

Country Status (1)

Country Link
JP (1) JPS5469359A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478948A (en) * 1977-12-07 1979-06-23 Hitachi Ltd Surface acoustic wave device
US4870312A (en) * 1987-02-19 1989-09-26 Hazeltine Corporation Surface wave device having anti-reflective shield
EP1187324A2 (en) * 2000-09-06 2002-03-13 Hitachi, Ltd. Surface acoustic wave device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478948A (en) * 1977-12-07 1979-06-23 Hitachi Ltd Surface acoustic wave device
JPS6145403B2 (en) * 1977-12-07 1986-10-08 Hitachi Ltd
US4870312A (en) * 1987-02-19 1989-09-26 Hazeltine Corporation Surface wave device having anti-reflective shield
EP1187324A2 (en) * 2000-09-06 2002-03-13 Hitachi, Ltd. Surface acoustic wave device
EP1187324A3 (en) * 2000-09-06 2009-03-11 Hitachi, Ltd. Surface acoustic wave device

Also Published As

Publication number Publication date
JPS5740685B2 (en) 1982-08-30

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