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GB1389610A - Surfacewave devices - Google Patents

Surfacewave devices

Info

Publication number
GB1389610A
GB1389610A GB4675272A GB4675272A GB1389610A GB 1389610 A GB1389610 A GB 1389610A GB 4675272 A GB4675272 A GB 4675272A GB 4675272 A GB4675272 A GB 4675272A GB 1389610 A GB1389610 A GB 1389610A
Authority
GB
United Kingdom
Prior art keywords
enclosure
transducers
cover
connection
surface 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.)
Expired
Application number
GB4675272A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB4675272A priority Critical patent/GB1389610A/en
Publication of GB1389610A publication Critical patent/GB1389610A/en
Expired 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 elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/05—Holders or supports
    • H03H9/10—Mounting in enclosures
    • H03H9/1064—Mounting in enclosures for surface acoustic wave [SAW] devices
    • H03H9/1092—Mounting in enclosures for surface acoustic wave [SAW] devices the enclosure being defined by a cover cap mounted on an element forming part of the surface acoustic wave [SAW] device on the side of the IDT's
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02834—Means for compensation or elimination of undesirable effects of temperature influence

Landscapes

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

Abstract

1389610 Acoustic surface wave devices MARCONI CO Ltd 31 Aug 1973 [11 Oct 1972] 46752/72 Heading H3U An acoustic surface wave device, e.g. a delay line or a frequency or pulse compression filter, comprises a body 10 of piezoeleetrio material with transducers on its surface 18, the body forming one wall of a gas-tight enclosure around the transducers. As shown the transducers are of comb form with bus-bars 20, 21 extending outside the enclosure for connection, and the enclosure is evacuated or filled with an inert gas. The enclosure side walls 14 are of epoxy resin or polyethylene and cover 12 is of the same material as the body 10, e.g. quartz, to minimize thermal expansion problems. The inner surface 16 of the cover has a conductive coating to confine the magnetic field and reduce crosstalk. The cover overhangs the walls 14 (Fig. 3, not shown) so that connection may be made to the coating.
GB4675272A 1972-10-11 1972-10-11 Surfacewave devices Expired GB1389610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4675272A GB1389610A (en) 1972-10-11 1972-10-11 Surfacewave devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4675272A GB1389610A (en) 1972-10-11 1972-10-11 Surfacewave devices

Publications (1)

Publication Number Publication Date
GB1389610A true GB1389610A (en) 1975-04-03

Family

ID=10442456

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4675272A Expired GB1389610A (en) 1972-10-11 1972-10-11 Surfacewave devices

Country Status (1)

Country Link
GB (1) GB1389610A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047129A (en) * 1975-03-13 1977-09-06 Murata Manufacturing Co., Ltd. Elastic surface wave filter
US4090153A (en) * 1976-06-07 1978-05-16 Rca Corporation Surface acoustic wave absorber
FR2437110A1 (en) * 1978-09-25 1980-04-18 United Technologies Corp DEVICE FOR VACUUM CAPSULE SURFACE ACOUSTIC WAVE AND MANUFACTURING METHOD
FR2444936A1 (en) * 1978-12-22 1980-07-18 United Technologies Corp SURFACE SOUND WAVE PRESSURE SENSOR STRUCTURE
US4270105A (en) * 1979-05-14 1981-05-26 Raytheon Company Stabilized surface wave device
US4699682A (en) * 1985-10-23 1987-10-13 Clarion Co., Ltd. Surface acoustic wave device sealing method
EP0449473A2 (en) * 1990-03-26 1991-10-02 AT&T Corp. Method for hermetically sealing electronic devices
EP0805552A2 (en) * 1996-04-29 1997-11-05 Motorola, Inc. Acoustic wave filter package and method

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047129A (en) * 1975-03-13 1977-09-06 Murata Manufacturing Co., Ltd. Elastic surface wave filter
US4090153A (en) * 1976-06-07 1978-05-16 Rca Corporation Surface acoustic wave absorber
FR2437110A1 (en) * 1978-09-25 1980-04-18 United Technologies Corp DEVICE FOR VACUUM CAPSULE SURFACE ACOUSTIC WAVE AND MANUFACTURING METHOD
US4213104A (en) * 1978-09-25 1980-07-15 United Technologies Corporation Vacuum encapsulation for surface acoustic wave (SAW) devices
FR2444936A1 (en) * 1978-12-22 1980-07-18 United Technologies Corp SURFACE SOUND WAVE PRESSURE SENSOR STRUCTURE
US4270105A (en) * 1979-05-14 1981-05-26 Raytheon Company Stabilized surface wave device
US4699682A (en) * 1985-10-23 1987-10-13 Clarion Co., Ltd. Surface acoustic wave device sealing method
EP0449473A2 (en) * 1990-03-26 1991-10-02 AT&T Corp. Method for hermetically sealing electronic devices
EP0449473A3 (en) * 1990-03-26 1992-03-04 American Telephone And Telegraph Company Method for hermetically sealing electronic devices
EP0805552A2 (en) * 1996-04-29 1997-11-05 Motorola, Inc. Acoustic wave filter package and method
US5729185A (en) * 1996-04-29 1998-03-17 Motorola Inc. Acoustic wave filter package lid attachment apparatus and method utilizing a novolac epoxy based seal
EP0805552A3 (en) * 1996-04-29 1998-07-08 Motorola, Inc. Acoustic wave filter package and method

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee