IT1020984B - Dispositivo ad onde acustiche su perficiali particolarmente per fil tri passabanda e simili - Google Patents

Dispositivo ad onde acustiche su perficiali particolarmente per fil tri passabanda e simili

Info

Publication number
IT1020984B
IT1020984B IT70045/74A IT7004574A IT1020984B IT 1020984 B IT1020984 B IT 1020984B IT 70045/74 A IT70045/74 A IT 70045/74A IT 7004574 A IT7004574 A IT 7004574A IT 1020984 B IT1020984 B IT 1020984B
Authority
IT
Italy
Prior art keywords
perficials
similar
band pass
acoustic waves
wires band
Prior art date
Application number
IT70045/74A
Other languages
English (en)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Application granted granted Critical
Publication of IT1020984B publication Critical patent/IT1020984B/it

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
    • H03H9/30—Time-delay networks
    • 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
    • H03H9/02543—Characteristics of substrate, e.g. cutting angles
    • 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
    • H03H9/02614—Treatment of substrates, e.g. curved, spherical, cylindrical substrates ensuring closed round-about circuits for the acoustical waves
    • H03H9/02622—Treatment of substrates, e.g. curved, spherical, cylindrical substrates ensuring closed round-about circuits for the acoustical waves of the surface, including back surface
    • 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
    • H03H9/02866—Means for compensation or elimination of undesirable effects of bulk wave excitation and reflections

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
IT70045/74A 1973-10-12 1974-10-11 Dispositivo ad onde acustiche su perficiali particolarmente per fil tri passabanda e simili IT1020984B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4774573A GB1440950A (en) 1973-10-12 1973-10-12 Acoustic surface-wave devices

Publications (1)

Publication Number Publication Date
IT1020984B true IT1020984B (it) 1977-12-30

Family

ID=10446109

Family Applications (1)

Application Number Title Priority Date Filing Date
IT70045/74A IT1020984B (it) 1973-10-12 1974-10-11 Dispositivo ad onde acustiche su perficiali particolarmente per fil tri passabanda e simili

Country Status (12)

Country Link
US (1) US3956647A (it)
JP (1) JPS5080051A (it)
AU (1) AU7417874A (it)
BE (1) BE821003A (it)
BR (1) BR7408485D0 (it)
CA (1) CA1019812A (it)
DE (1) DE2447814A1 (it)
ES (1) ES430906A1 (it)
FR (1) FR2247850B1 (it)
GB (1) GB1440950A (it)
IT (1) IT1020984B (it)
SE (1) SE398585B (it)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4044321A (en) * 1976-03-01 1977-08-23 Rockwell International Corporation Surface acoustic wave band pass filtering
GB2000926B (en) * 1977-07-05 1982-04-28 Texas Instruments Inc Channel selector for television receiver
JPS5643819A (en) * 1979-09-18 1981-04-22 Nec Corp Surface elastic wave filter
CA1227862A (en) * 1981-08-17 1987-10-06 Sumitomo Electric Industries, Ltd. Optical integrated circuits
JPS5964908A (ja) * 1982-10-05 1984-04-13 Nobuo Mikoshiba 弾性表面波素子
DE59207500D1 (de) * 1991-03-28 1996-12-12 Siemens Ag Oberflächenwellenanordnung mit einer struktur zur vermeidung störender akustischer wellenanteile
JP3243047B2 (ja) * 1993-03-12 2002-01-07 呉羽化学工業株式会社 受波型圧電素子
US5576589A (en) * 1994-10-13 1996-11-19 Kobe Steel Usa, Inc. Diamond surface acoustic wave devices
DE10102747B4 (de) * 2001-01-22 2010-06-10 Epcos Ag Piezoelektrisches Substrat und Verfahren zur Herstellung
DE102015106191A1 (de) * 2015-04-22 2016-10-27 Epcos Ag Elektroakustisches Bauelement mit verbesserter Akustik

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3070761A (en) * 1953-05-07 1962-12-25 Smith & Sons Ltd S Ultrasonic delay lines
US3845420A (en) * 1973-03-02 1974-10-29 Raytheon Co Surface acoustic wave phase control device
US3846722A (en) * 1973-04-04 1974-11-05 Westinghouse Electric Corp Surface wave preselector
US3866153A (en) * 1973-10-11 1975-02-11 Us Air Force Ultra low diffraction loss substrate members for acoustic surface wave devices
US3845418A (en) * 1974-01-02 1974-10-29 Hughes Aircraft Co Acoustic surface wave device with reduced rf feedthrough

Also Published As

Publication number Publication date
GB1440950A (en) 1976-06-30
AU7417874A (en) 1976-04-15
US3956647A (en) 1976-05-11
BE821003A (fr) 1975-04-11
CA1019812A (en) 1977-10-25
SE7412716L (it) 1975-04-14
SE398585B (sv) 1977-12-27
FR2247850A1 (it) 1975-05-09
FR2247850B1 (it) 1979-06-01
ES430906A1 (es) 1976-10-16
DE2447814A1 (de) 1975-04-17
JPS5080051A (it) 1975-06-28
BR7408485D0 (pt) 1975-09-16

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