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JPS5623014A - Elastic surface wave filter - Google Patents

Elastic surface wave filter

Info

Publication number
JPS5623014A
JPS5623014A JP5352080A JP5352080A JPS5623014A JP S5623014 A JPS5623014 A JP S5623014A JP 5352080 A JP5352080 A JP 5352080A JP 5352080 A JP5352080 A JP 5352080A JP S5623014 A JPS5623014 A JP S5623014A
Authority
JP
Japan
Prior art keywords
electrode
transducer
surface wave
elastic surface
elements
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
JP5352080A
Other languages
Japanese (ja)
Other versions
JPS5651690B2 (en
Inventor
Takahiro Inamura
Isamu Odaka
Jiro Tenmiyo
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP5352080A priority Critical patent/JPS5623014A/en
Publication of JPS5623014A publication Critical patent/JPS5623014A/en
Publication of JPS5651690B2 publication Critical patent/JPS5651690B2/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
    • H03H9/02—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
    • 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
    • H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
    • H03H9/14514—Broad band 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
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6489—Compensation of undesirable effects
    • H03H9/6493—Side lobe suppression

Landscapes

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

Abstract

PURPOSE:To enable to obtain sufficiently broad passage band width, by taking care of the location and opposing length of each electrode element constituting the transducer. CONSTITUTION:On the piezoelectric substrate 1, the transducer A having the electrode EA1 consisting of the electrode EA1, and the electrode EA2 consisting of the electrode elements eA21, eA22, and the transducer B having the electrode EB1 consisting of the electrode elements eB10, 11, 11', 12, 12' and the electrode EB2 consisting of the electrode elements eB21, 21', 22, 22', are located. The electrode element adjacent is located with the distance of lambda/2 (where lambda is the wave length of elastic surface wave). Further, the opposing length of the electrode elements is taken as R1, R2, R3 as shown in figure so that the relation of 0<R2<=R, and 0.03<=R3<= 0.375R1 can be obtained. Thus, as shown in figure, the band pass filter characteristics having the double peak type main lobe between the terminals TA1 and TA2 and between TB1 and TB2, can be obtained.
JP5352080A 1980-04-24 1980-04-24 Elastic surface wave filter Granted JPS5623014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5352080A JPS5623014A (en) 1980-04-24 1980-04-24 Elastic surface wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5352080A JPS5623014A (en) 1980-04-24 1980-04-24 Elastic surface wave filter

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP8392074A Division JPS5112747A (en) 1974-07-23 1974-07-23 DANSEIHYOMENHAFUIRUTA

Publications (2)

Publication Number Publication Date
JPS5623014A true JPS5623014A (en) 1981-03-04
JPS5651690B2 JPS5651690B2 (en) 1981-12-07

Family

ID=12945092

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5352080A Granted JPS5623014A (en) 1980-04-24 1980-04-24 Elastic surface wave filter

Country Status (1)

Country Link
JP (1) JPS5623014A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02236323A (en) * 1988-10-21 1990-09-19 Self Cleaning Environments Inc Automatic flushing type lavoratory

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6117388U (en) * 1984-07-09 1986-01-31 スズキ株式会社 Footrest structure of saddle type vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02236323A (en) * 1988-10-21 1990-09-19 Self Cleaning Environments Inc Automatic flushing type lavoratory

Also Published As

Publication number Publication date
JPS5651690B2 (en) 1981-12-07

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