JPS5498550A - Surface acoustic wave filter - Google Patents

Surface acoustic wave filter

Info

Publication number
JPS5498550A
JPS5498550A JP524778A JP524778A JPS5498550A JP S5498550 A JPS5498550 A JP S5498550A JP 524778 A JP524778 A JP 524778A JP 524778 A JP524778 A JP 524778A JP S5498550 A JPS5498550 A JP S5498550A
Authority
JP
Japan
Prior art keywords
electrode
surface acoustic
propagation
propagation path
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
JP524778A
Other languages
Japanese (ja)
Inventor
Kentaro Hanma
Takeshi Hazama
Takeshi Murakami
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 JP524778A priority Critical patent/JPS5498550A/en
Publication of JPS5498550A publication Critical patent/JPS5498550A/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
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6489—Compensation of undesirable effects
    • H03H9/6493—Side lobe suppression
    • 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

Landscapes

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

Abstract

PURPOSE:To suppress high harmonics transmitting performance, by providing the metal plate different in the surface acoustic wave propagation speed between input and output electrodes from that in the substrate, and by producing two types of surface waves in opposite phase each other at the output electrode. CONSTITUTION:The input electrode 6 and the output electrode 7 having electrode finger being the inter-digital electrode are placed at the both ends of the substrate consisting of crystal or ceramic having piezoelectricity, and the part between them is used as the propagation path 9 for surface acoustic waves. The ends 10a and 10b orthogonal each other toward the direction of propagation are present on the propagation path 9, and the electrode 10 taking the distance as D is newly formed. Thus, the surface acoustic waves produced at the electrode 6 propagate the propagation path 9. A part of it reaches the electrode as the arrow B, but a part of the remainder reaches the electrode 7 through the electrode 10 as the arrow A, and there is a difference between the propagation speed. They are opposite each other and the strength is equal, then no harmonics are cancelled each other and caused.
JP524778A 1978-01-23 1978-01-23 Surface acoustic wave filter Pending JPS5498550A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP524778A JPS5498550A (en) 1978-01-23 1978-01-23 Surface acoustic wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP524778A JPS5498550A (en) 1978-01-23 1978-01-23 Surface acoustic wave filter

Publications (1)

Publication Number Publication Date
JPS5498550A true JPS5498550A (en) 1979-08-03

Family

ID=11605865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP524778A Pending JPS5498550A (en) 1978-01-23 1978-01-23 Surface acoustic wave filter

Country Status (1)

Country Link
JP (1) JPS5498550A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS498150A (en) * 1972-05-10 1974-01-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS498150A (en) * 1972-05-10 1974-01-24

Similar Documents

Publication Publication Date Title
US3663899A (en) Surface-wave electro-acoustic filter
GB1491896A (en) Acoustic bulk mode suppressor
GB1513466A (en) Acoustic surface wave devices
US3990023A (en) Elastic surface wave device
GB1530665A (en) Acoustic wave devices
GB1413916A (en) Acoustic surface-wave devices
JPS529389A (en) Surface acoustic wave device
JPS568914A (en) Low-frequency dispersed type delay line
JPS5498550A (en) Surface acoustic wave filter
JPS56114423A (en) Elastic surface wave filter
JPS5773514A (en) Surface acoustic wave filter
JPS55159612A (en) Elastic surface wave element
JPS5797215A (en) Surface acoustic wave device
JPS564916A (en) Elastic surface wave filter
JPS6423605A (en) Fm demodulator utilizing elastic surface wave delay line
JPS63110809A (en) Surface acoustic wave propagation element
JPS53132246A (en) Elastic surface wave filter
JPS5711520A (en) Elastic surface wave resonator
JPS54158895A (en) Elastic surface wave device
JPS5541069A (en) Crystal oscillation unit of slide wave
JPS55162613A (en) Surface elastic wave filter
JPS54107651A (en) Surface acoustic wave element
JPS5768925A (en) Piezoelectric device
JPS555510A (en) Surface acoustic wave unit
JPS55114020A (en) Elastic surface wave filter