JPS55687A - Elastic surface wave filter - Google Patents

Elastic surface wave filter

Info

Publication number
JPS55687A
JPS55687A JP5152179A JP5152179A JPS55687A JP S55687 A JPS55687 A JP S55687A JP 5152179 A JP5152179 A JP 5152179A JP 5152179 A JP5152179 A JP 5152179A JP S55687 A JPS55687 A JP S55687A
Authority
JP
Japan
Prior art keywords
electrode groups
elastic surface
comb
wave filter
surface wave
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
JP5152179A
Other languages
Japanese (ja)
Other versions
JPS641974B2 (en
Inventor
Yasuaki Kinoshita
Toyoji Tabuchi
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 JP5152179A priority Critical patent/JPS55687A/en
Publication of JPS55687A publication Critical patent/JPS55687A/en
Publication of JPS641974B2 publication Critical patent/JPS641974B2/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 devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6489—Compensation of undesirable effects
    • H03H9/6496—Reducing ripple in transfer characteristic
    • 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
    • H03H9/02637—Details concerning reflective or coupling arrays
    • H03H9/02685—Grating lines having particular arrangements
    • H03H9/02716—Tilted, fan shaped or slanted grating lines
    • 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
    • H03H9/02637—Details concerning reflective or coupling arrays
    • H03H9/02685—Grating lines having particular arrangements
    • H03H9/02771—Reflector banks
    • 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
    • H03H9/02637—Details concerning reflective or coupling arrays
    • H03H9/02795—Multi-strip couplers as track changers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6403—Programmable filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6423—Means for obtaining a particular transfer characteristic
    • H03H9/6433—Coupled resonator filters
    • H03H9/644—Coupled resonator filters having two acoustic tracks
    • H03H9/6443—Coupled resonator filters having two acoustic tracks being acoustically coupled
    • H03H9/6446—Coupled resonator filters having two acoustic tracks being acoustically coupled by floating multistrip couplers

Landscapes

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

Abstract

PURPOSE:To obtain an elastic surface wave filter which features a low loss and wide range with no ripple caused to the frequency characteristics. CONSTITUTION:Reflective electrode groups 17,18,19 and 20 are formed with transducer 2 comprising the comb-line sending-end reed screen electrode groups which convert the electric signals into the elastic surface waves on the surface of piezoelectric substrate 14; transducer 3 of comb-line receiving-end which converts the elastic surface waves into the electric signals; coupling electrode groups 15 and 16 arranged in parallel at both sides of the above mentioned electrode groups; and four comb-line reed screen electrode groups provided outside groups 15 and 16 respectively. And electrode groups 15 and 16 are constituted so that they may operate as the 3dB directional couplers.
JP5152179A 1979-04-27 1979-04-27 Elastic surface wave filter Granted JPS55687A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5152179A JPS55687A (en) 1979-04-27 1979-04-27 Elastic surface wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5152179A JPS55687A (en) 1979-04-27 1979-04-27 Elastic surface wave filter

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP53034584A Division JPS5828177B2 (en) 1978-03-24 1978-03-24 Blister pack with stopper lid

Publications (2)

Publication Number Publication Date
JPS55687A true JPS55687A (en) 1980-01-07
JPS641974B2 JPS641974B2 (en) 1989-01-13

Family

ID=12889308

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5152179A Granted JPS55687A (en) 1979-04-27 1979-04-27 Elastic surface wave filter

Country Status (1)

Country Link
JP (1) JPS55687A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59151021A (en) * 1982-12-15 1984-08-29 ウエストフエ−リツシエ・メタル・インドウストリ−・コムマンデイト・ゲゼルシヤフト・ヒユツク・ウント・コムパニ− Device for measuring and monitoring state of filling of liquid vessel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59151021A (en) * 1982-12-15 1984-08-29 ウエストフエ−リツシエ・メタル・インドウストリ−・コムマンデイト・ゲゼルシヤフト・ヒユツク・ウント・コムパニ− Device for measuring and monitoring state of filling of liquid vessel

Also Published As

Publication number Publication date
JPS641974B2 (en) 1989-01-13

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