JPS6484904A - Surface acoustic wave device - Google Patents

Surface acoustic wave device

Info

Publication number
JPS6484904A
JPS6484904A JP23996187A JP23996187A JPS6484904A JP S6484904 A JPS6484904 A JP S6484904A JP 23996187 A JP23996187 A JP 23996187A JP 23996187 A JP23996187 A JP 23996187A JP S6484904 A JPS6484904 A JP S6484904A
Authority
JP
Japan
Prior art keywords
electrodes
input
shield
substrate
acoustic 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
JP23996187A
Other languages
Japanese (ja)
Inventor
Takaya Watanabe
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
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 filed Critical NEC Corp
Priority to JP23996187A priority Critical patent/JPS6484904A/en
Publication of JPS6484904A publication Critical patent/JPS6484904A/en
Pending legal-status Critical Current

Links

Landscapes

  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

PURPOSE:To reduce the coupling between input and output electrodes by providing a pair of independent shield electrodes for shield on one surface of a substrate for propagating a surface acoustic wave. CONSTITUTION:An input having electrical energy is inputted to input electrodes 13, 14, and converted to energy of an elastic wave by an input side inter-digital transducer 11. The elastic wave is propagated on a substrate, becomes electrical energy again by an inter-digital transducer 12, and outputted from output electrodes 15, 16. On the surface of a piezoelectric substrate between the input electrodes 13, 14 and the output electrodes 15, 16, a pair of independent shield electrodes 17, 18 for shield are provided. To the electrodes 17, 18, an earth potential is applied. When the electrodes 17, 18 are provided, an electromagnetic coupling between the electrodes 13, 15 or 14, 16 is reduced. Also, a frequency - gain characteristic of a frequency band exceeding GHz is improved, and a filter characteristic becomes satisfactory.
JP23996187A 1987-09-26 1987-09-26 Surface acoustic wave device Pending JPS6484904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23996187A JPS6484904A (en) 1987-09-26 1987-09-26 Surface acoustic wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23996187A JPS6484904A (en) 1987-09-26 1987-09-26 Surface acoustic wave device

Publications (1)

Publication Number Publication Date
JPS6484904A true JPS6484904A (en) 1989-03-30

Family

ID=17052407

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23996187A Pending JPS6484904A (en) 1987-09-26 1987-09-26 Surface acoustic wave device

Country Status (1)

Country Link
JP (1) JPS6484904A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0480125U (en) * 1990-11-27 1992-07-13

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5420308A (en) * 1977-07-15 1979-02-15 Matsushita Electric Works Ltd Fixing device of small motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5420308A (en) * 1977-07-15 1979-02-15 Matsushita Electric Works Ltd Fixing device of small motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0480125U (en) * 1990-11-27 1992-07-13

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