GB1389610A - Surfacewave devices - Google Patents
Surfacewave devicesInfo
- 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
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
- H03H9/05—Holders; 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 devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02535—Details of surface acoustic wave devices
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02834—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.
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)
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 |
-
1972
- 1972-10-11 GB GB4675272A patent/GB1389610A/en not_active Expired
Cited By (12)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA926024A (en) | High frequency bulk semiconductor amplifiers and oscillators | |
GB1548189A (en) | Diplexing orthomode transducer for double utilization of frequencies | |
GB1389610A (en) | Surfacewave devices | |
AU3792872A (en) | Device for generating acoustic waves by implosion | |
GB1555216A (en) | Backward wave oscillator tube for the production of microwaves | |
CA963108A (en) | Device for generating electrical oscillations of a variable high frequency | |
CA979064A (en) | High frequency continuous wave ignition system | |
CA584895A (en) | Ultra high frequency electromagnetic wave transmission apparatus through hermetically sealed space | |
JPS5399748A (en) | Variable delay line | |
JPS5312293A (en) | Crystal vibrator | |
HK33078A (en) | Audio frequency oscillator | |
FR2399176A1 (en) | High fidelity reproduction of low frequencies - is performed by inverting loudspeaker mounting position in enclosure | |
AU494613B2 (en) | Switching device for switching signals of very high and ultrahigh frequencies | |
CA696107A (en) | Frequency multiplier and wave signal generator | |
AU1204570A (en) | Arrangement for frequency selection of an ultrasonic vibration | |
CA891062A (en) | Plasma tube impedance variation frequency stabilized gas laser | |
JPS5413323A (en) | Speaker system of phase inversion type | |
CA785993A (en) | Method of generating sub-millimeter waves | |
GB1218721A (en) | Improved method for adjusting a crystal oscillator | |
CA793530A (en) | Device for regulating the frequency of mechanical oscillators | |
CA801207A (en) | Very low frequency wave form generators | |
KANAVETS et al. | Special properties of the interaction between the beam and waves in a periodic structure close to the limits of the passband(in traveling wave tube) | |
CA910431A (en) | Semiconductor arrangement for the nonreciprocal amplification or generation of high frequency oscillations | |
AU235542B2 (en) | An electronic tube capable of producing electromagnetic wave oscillations of high and very high frequency | |
JPS5597333A (en) | Device for hermetically sealing mouth portion of vessel by high frequency |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |