JPS5678217A - Elastic surface wave device - Google Patents

Elastic surface wave device

Info

Publication number
JPS5678217A
JPS5678217A JP15438679A JP15438679A JPS5678217A JP S5678217 A JPS5678217 A JP S5678217A JP 15438679 A JP15438679 A JP 15438679A JP 15438679 A JP15438679 A JP 15438679A JP S5678217 A JPS5678217 A JP S5678217A
Authority
JP
Japan
Prior art keywords
electrode
output
input
varying
electrode fingers
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.)
Pending
Application number
JP15438679A
Other languages
Japanese (ja)
Inventor
Seiji Kishimoto
Hitoshi Yanagihara
Takeshi Hazama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15438679A priority Critical patent/JPS5678217A/en
Publication of JPS5678217A publication Critical patent/JPS5678217A/en
Pending 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
    • H03H9/125—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
    • H03H9/14514—Broad band transducers

Landscapes

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

Abstract

PURPOSE:To reduce a loss by forming distribution constant lines of metal strips by making parallel connections with input electrodes while obtaining the capacity more than a prescribed value by varying the number of electrode fingers or opening length. CONSTITUTION:On piezoelectric substrate 1, output electrode 3 having several electrode fingers varying in electrode finger pitch in the order of P1-Pn-1 is formed and while input electrode 2 and output electrode 3 are connected at one-side terminals to input terminal 4 applied with an electric signal or output terminal 5 from which an output electric signal is extracted, the other-side terminals are grounded. The capacitance of either one of input and output electrodes is in proportion to the product of opening length W and the number (n) or (m) of electrode fingers. For this purpose, the capacity is set to >=7 pF by varying the number (n) and (m) of electrode fingers or opening length W and parallel connections with input electrodes 2 and 3 are made so as to distribution constant lines 6 and 7 of metallic strips. Thus, a loss can be reduced by about 10 dB.
JP15438679A 1979-11-30 1979-11-30 Elastic surface wave device Pending JPS5678217A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15438679A JPS5678217A (en) 1979-11-30 1979-11-30 Elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15438679A JPS5678217A (en) 1979-11-30 1979-11-30 Elastic surface wave device

Publications (1)

Publication Number Publication Date
JPS5678217A true JPS5678217A (en) 1981-06-27

Family

ID=15582993

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15438679A Pending JPS5678217A (en) 1979-11-30 1979-11-30 Elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS5678217A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117318662A (en) * 2023-11-13 2023-12-29 深圳新声半导体有限公司 Surface acoustic wave resonator and MEMS device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5234638B2 (en) * 1972-03-03 1977-09-05

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5234638B2 (en) * 1972-03-03 1977-09-05

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117318662A (en) * 2023-11-13 2023-12-29 深圳新声半导体有限公司 Surface acoustic wave resonator and MEMS device

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