JPS5623015A - Elastic surface wave filter - Google Patents

Elastic surface wave filter

Info

Publication number
JPS5623015A
JPS5623015A JP5352280A JP5352280A JPS5623015A JP S5623015 A JPS5623015 A JP S5623015A JP 5352280 A JP5352280 A JP 5352280A JP 5352280 A JP5352280 A JP 5352280A JP S5623015 A JPS5623015 A JP S5623015A
Authority
JP
Japan
Prior art keywords
electrode
transducer
elements
surface wave
elastic surface
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
JP5352280A
Other languages
Japanese (ja)
Other versions
JPS5651692B2 (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 JP5352280A priority Critical patent/JPS5623015A/en
Publication of JPS5623015A publication Critical patent/JPS5623015A/en
Publication of JPS5651692B2 publication Critical patent/JPS5651692B2/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 achieve sufficiently wide pass band, by devising the arrangement and opposing length of each electrode element constituting the transducer. CONSTITUTION:On the piezoelectric substrate 1, the transducer A having the electrodes EA1, EA2 respectively consisting of the electrode elements eA11, eA21 and the transducer B having the electrode EB1 consisting of the electrode elements eB11, 12, 11', and the electrode EB2 consisting of the elements eB21, 21' and 22' are located. Said electrode elements adjacent each other are 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 shown in figure, so that the relations of 0.04R1<=R2<=0.2R1, where R1 and R2 are the opposing length. Thus, the band pass filter characteristics showing the double peak main lobe between the terminals TA1 and TA2 and the terminals TB1 and TB2, as shown in figure, can be obtained.
JP5352280A 1980-04-24 1980-04-24 Elastic surface wave filter Granted JPS5623015A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5352280A JPS5623015A (en) 1980-04-24 1980-04-24 Elastic surface wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5352280A JPS5623015A (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
JPS5623015A true JPS5623015A (en) 1981-03-04
JPS5651692B2 JPS5651692B2 (en) 1981-12-07

Family

ID=12945144

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5352280A Granted JPS5623015A (en) 1980-04-24 1980-04-24 Elastic surface wave filter

Country Status (1)

Country Link
JP (1) JPS5623015A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0466201U (en) * 1990-10-19 1992-06-10

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5957080A (en) * 1982-09-28 1984-04-02 本田技研工業株式会社 Supporter for front fork of two-wheel barrow
JPS61117083U (en) * 1985-01-08 1986-07-24

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0466201U (en) * 1990-10-19 1992-06-10

Also Published As

Publication number Publication date
JPS5651692B2 (en) 1981-12-07

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