HK40783A - Elastic surface wave device - Google Patents

Elastic surface wave device

Info

Publication number
HK40783A
HK40783A HK407/83A HK40783A HK40783A HK 40783 A HK40783 A HK 40783A HK 407/83 A HK407/83 A HK 407/83A HK 40783 A HK40783 A HK 40783A HK 40783 A HK40783 A HK 40783A
Authority
HK
Hong Kong
Prior art keywords
wave device
surface wave
elastic surface
elastic
wave
Prior art date
Application number
HK407/83A
Other languages
English (en)
Inventor
Yoshihiko Noro
Katashi Hazama
Yamadajun
Hitoshi Yanagihara
Michiyori Miura
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
Publication of HK40783A publication Critical patent/HK40783A/xx

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
    • H03H9/14573—Arrow type 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
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02842—Means for compensation or elimination of undesirable effects of reflections
    • 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
    • H03H9/14544—Transducers of particular shape or position
    • H03H9/14547—Fan shaped; Tilted; Shifted; Slanted; Tapered; Arched; Stepped finger 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
    • H03H9/125—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
    • H03H9/14555—Chirped 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
    • H03H9/6496—Reducing ripple in transfer characteristic
    • 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
    • H03H9/02992—Details of bus bars, contact pads or other electrical connections for finger electrodes

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
HK407/83A 1977-06-20 1983-10-13 Elastic surface wave device HK40783A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7205677A JPS547257A (en) 1977-06-20 1977-06-20 Elastic surface wave device

Publications (1)

Publication Number Publication Date
HK40783A true HK40783A (en) 1983-10-21

Family

ID=13478335

Family Applications (1)

Application Number Title Priority Date Filing Date
HK407/83A HK40783A (en) 1977-06-20 1983-10-13 Elastic surface wave device

Country Status (6)

Country Link
US (1) US4201964A (xx)
JP (1) JPS547257A (xx)
DE (1) DE2826891C3 (xx)
GB (1) GB2000932B (xx)
HK (1) HK40783A (xx)
SG (1) SG25283G (xx)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2090093A (en) * 1980-12-19 1982-06-30 Philips Electronic Associated Acoustic wave devices
DE3208252A1 (de) * 1982-03-08 1983-09-15 Siemens AG, 1000 Berlin und 8000 München Interdigitalwandler mit unterdrueckung reflektierter stoersignale
US4485364A (en) * 1983-05-17 1984-11-27 Zenith Electronics Corporation Reflection-compensated surface acoustic wave transducer
US4604623A (en) * 1983-06-30 1986-08-05 X-Cyte Inc. Surface acoustic wave passive transponder having non-reflective transducers and pads
CA1254994A (en) * 1985-03-29 1989-05-30 Mark S. Suthers Saw devices with reflection-suppressing fingers
US4870312A (en) * 1987-02-19 1989-09-26 Hazeltine Corporation Surface wave device having anti-reflective shield
DE4010310A1 (de) * 1990-03-30 1991-10-02 Siemens Ag Oberflaechenwellenwandler, insbesondere in splitfinger-ausfuehrung, mit unterdrueckung von reflexionen endstaendiger wandlerfinger
US6107910A (en) 1996-11-29 2000-08-22 X-Cyte, Inc. Dual mode transmitter/receiver and decoder for RF transponder tags
JP3330512B2 (ja) * 1997-04-17 2002-09-30 株式会社日立製作所 弾性表面波素子
US5986382A (en) 1997-08-18 1999-11-16 X-Cyte, Inc. Surface acoustic wave transponder configuration
US6114971A (en) * 1997-08-18 2000-09-05 X-Cyte, Inc. Frequency hopping spread spectrum passive acoustic wave identification device
US6060815A (en) * 1997-08-18 2000-05-09 X-Cyte, Inc. Frequency mixing passive transponder
US6208062B1 (en) 1997-08-18 2001-03-27 X-Cyte, Inc. Surface acoustic wave transponder configuration

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1413916A (en) * 1973-09-17 1975-11-12 Mullard Ltd Acoustic surface-wave devices
GB1499330A (en) * 1974-09-26 1978-02-01 Plessey Co Ltd Acoustic surface wave filters
JPS51113440A (en) * 1975-03-28 1976-10-06 Toko Inc Elastic surface wave device

Also Published As

Publication number Publication date
GB2000932B (en) 1982-01-13
US4201964A (en) 1980-05-06
JPS547257A (en) 1979-01-19
DE2826891B2 (de) 1980-03-13
JPS5761211B2 (xx) 1982-12-23
SG25283G (en) 1984-08-03
DE2826891C3 (de) 1980-11-27
DE2826891A1 (de) 1979-01-25
GB2000932A (en) 1979-01-17

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Legal Events

Date Code Title Description
PE Patent expired