JPS5654114A - Reed screen shape converter of elastic surface wave - Google Patents

Reed screen shape converter of elastic surface wave

Info

Publication number
JPS5654114A
JPS5654114A JP13101279A JP13101279A JPS5654114A JP S5654114 A JPS5654114 A JP S5654114A JP 13101279 A JP13101279 A JP 13101279A JP 13101279 A JP13101279 A JP 13101279A JP S5654114 A JPS5654114 A JP S5654114A
Authority
JP
Japan
Prior art keywords
electrode
crossing
screen shape
reed screen
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.)
Pending
Application number
JP13101279A
Other languages
Japanese (ja)
Inventor
Kiyoshi Asakawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP13101279A priority Critical patent/JPS5654114A/en
Publication of JPS5654114A publication Critical patent/JPS5654114A/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
    • H03H9/14544—Transducers of particular shape or position
    • 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
    • H03H9/02992—Details of bus bars, contact pads or other electrical connections for finger electrodes
    • 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
    • H03H9/14517—Means for weighting
    • H03H9/1452—Means for weighting by finger overlap length, apodisation

Landscapes

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

Abstract

PURPOSE:To reduce the propagation loss based on the leakage of surface wave, by remarkably decreasing the Fourier components of piezoelectric or elastic oscillation filed causing the leakage of surface waves, through the constitution of a dummy electrode with nonperiodic electrode fingers. CONSTITUTION:A surface wave reed screen shape converter is formed by giving weight on the electrode finger length of a reed screen shape electrode crossing 31 provided to a piezoelectric board and providing a dummy electrode 32 at the noncrossing section of said reed screen shape electrode. Further, in this converter, taking the wave length of elastic surface waves as lambda, and the period of electrode finger of the crossing 31 as P, the nonperiodic shape electrode is formed so that the crossing 31 has the electrode finger satisfying the relation of P/lambda>0.5 and the dummy electrode 32 has the electrode/nonelectrode area ratio equal to the crossing 31 at an arbitrary area.
JP13101279A 1979-10-11 1979-10-11 Reed screen shape converter of elastic surface wave Pending JPS5654114A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13101279A JPS5654114A (en) 1979-10-11 1979-10-11 Reed screen shape converter of elastic surface wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13101279A JPS5654114A (en) 1979-10-11 1979-10-11 Reed screen shape converter of elastic surface wave

Publications (1)

Publication Number Publication Date
JPS5654114A true JPS5654114A (en) 1981-05-14

Family

ID=15047908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13101279A Pending JPS5654114A (en) 1979-10-11 1979-10-11 Reed screen shape converter of elastic surface wave

Country Status (1)

Country Link
JP (1) JPS5654114A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3838383A1 (en) * 1987-11-13 1989-06-01 Hitachi Ltd DEVICE FOR ACOUSTIC SURFACE WAVES WITH OVERLAP-WEIGHTED CONVERTER PROVIDED WITH A GROUP OF ELECTRODES WITH IRREGULAR SPACING
JPH04114225U (en) * 1991-03-26 1992-10-07 ミツミ電機株式会社 surface acoustic wave device
JP2003087083A (en) * 2001-07-04 2003-03-20 Murata Mfg Co Ltd Comb type electrode section, surface acoustic wave device and communications equipment for surface acoustic wave
WO2012084460A1 (en) * 2010-12-22 2012-06-28 Epcos Ag Electroacoustic resonator
WO2020120153A1 (en) * 2018-12-12 2020-06-18 RF360 Europe GmbH Electro acoustic resonator with suppressed transversal gap mode excitation and reduced transversal modes
WO2023286704A1 (en) * 2021-07-16 2023-01-19 京セラ株式会社 Elastic wave device, filter, splitter, and communication device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5224444A (en) * 1975-08-18 1977-02-23 Philips Nv Surface acoustic wave device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5224444A (en) * 1975-08-18 1977-02-23 Philips Nv Surface acoustic wave device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3838383A1 (en) * 1987-11-13 1989-06-01 Hitachi Ltd DEVICE FOR ACOUSTIC SURFACE WAVES WITH OVERLAP-WEIGHTED CONVERTER PROVIDED WITH A GROUP OF ELECTRODES WITH IRREGULAR SPACING
JPH04114225U (en) * 1991-03-26 1992-10-07 ミツミ電機株式会社 surface acoustic wave device
JP2003087083A (en) * 2001-07-04 2003-03-20 Murata Mfg Co Ltd Comb type electrode section, surface acoustic wave device and communications equipment for surface acoustic wave
WO2012084460A1 (en) * 2010-12-22 2012-06-28 Epcos Ag Electroacoustic resonator
WO2020120153A1 (en) * 2018-12-12 2020-06-18 RF360 Europe GmbH Electro acoustic resonator with suppressed transversal gap mode excitation and reduced transversal modes
CN113169719A (en) * 2018-12-12 2021-07-23 Rf360欧洲有限责任公司 Electroacoustic resonator with suppressed transverse gap mode excitation and reduced transverse modes
US11876504B2 (en) 2018-12-12 2024-01-16 Rf360 Singapore Pte. Ltd. Electro acoustic resonator with suppressed transversal gap mode excitation and reduced transversal modes
WO2023286704A1 (en) * 2021-07-16 2023-01-19 京セラ株式会社 Elastic wave device, filter, splitter, and communication device

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