JPS5765917A - Surface acoustic wave device - Google Patents

Surface acoustic wave device

Info

Publication number
JPS5765917A
JPS5765917A JP14222480A JP14222480A JPS5765917A JP S5765917 A JPS5765917 A JP S5765917A JP 14222480 A JP14222480 A JP 14222480A JP 14222480 A JP14222480 A JP 14222480A JP S5765917 A JPS5765917 A JP S5765917A
Authority
JP
Japan
Prior art keywords
electrode
electrodes
partial
capacity
weighting
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
JP14222480A
Other languages
Japanese (ja)
Inventor
Michio Kadota
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing 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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP14222480A priority Critical patent/JPS5765917A/en
Publication of JPS5765917A publication Critical patent/JPS5765917A/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
    • H03H9/1455—Transducers of particular shape or position constituted of N parallel or series transducers
    • 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
    • H03H9/02779—Continuous surface reflective arrays
    • 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 facilitate designing a device and to make the characteristics sharp, by dividing a weighting electrode in the wide part and providing an electrode for correction continuously for a partial electrode. CONSTITUTION:An interdigital electrode 1 consists of 30-90 logarithmic cross weighting electrodes. For the purpose of reducing the capacity between electrode fingers, the interdigital electrode 1 is divided, and partial electrodes are connected in series. The interdigital electrode 1 is divided in a comparatively wide part 1a of cross weighting electrodes to facilitate designing the device. Since the characteristics are degraded by induction between partial electrodes 4 and 5 in this constitution, a prescribed capacity ratio is given to respective partial electrodes, and a capacity is added to prevent the degradation. Therefore, the capacity is formed in a part 6 extended from the partial electrode 4.
JP14222480A 1980-10-11 1980-10-11 Surface acoustic wave device Pending JPS5765917A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14222480A JPS5765917A (en) 1980-10-11 1980-10-11 Surface acoustic wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14222480A JPS5765917A (en) 1980-10-11 1980-10-11 Surface acoustic wave device

Publications (1)

Publication Number Publication Date
JPS5765917A true JPS5765917A (en) 1982-04-21

Family

ID=15310296

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14222480A Pending JPS5765917A (en) 1980-10-11 1980-10-11 Surface acoustic wave device

Country Status (1)

Country Link
JP (1) JPS5765917A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5843609A (en) * 1981-09-09 1983-03-14 Toshiba Corp Surface acoustic wave device
US5471179A (en) * 1991-10-17 1995-11-28 Opytny Zavod Mikroelektroniki "Rif" Surface acoustic wave bandpass filter including unique V-shaped electrode and phase compensator
JPH09331233A (en) * 1996-06-12 1997-12-22 Toyo Commun Equip Co Ltd Surface acoustic wave filter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5324249A (en) * 1976-08-18 1978-03-06 Matsushita Electric Ind Co Ltd Elastic surface wave filter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5324249A (en) * 1976-08-18 1978-03-06 Matsushita Electric Ind Co Ltd Elastic surface wave filter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5843609A (en) * 1981-09-09 1983-03-14 Toshiba Corp Surface acoustic wave device
JPS6363128B2 (en) * 1981-09-09 1988-12-06
US5471179A (en) * 1991-10-17 1995-11-28 Opytny Zavod Mikroelektroniki "Rif" Surface acoustic wave bandpass filter including unique V-shaped electrode and phase compensator
JPH09331233A (en) * 1996-06-12 1997-12-22 Toyo Commun Equip Co Ltd Surface acoustic wave filter

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