GB1512686A - Acoustic surface wave devices - Google Patents
Acoustic surface wave devicesInfo
- Publication number
- GB1512686A GB1512686A GB3423475A GB3423475A GB1512686A GB 1512686 A GB1512686 A GB 1512686A GB 3423475 A GB3423475 A GB 3423475A GB 3423475 A GB3423475 A GB 3423475A GB 1512686 A GB1512686 A GB 1512686A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transducer
- surface wave
- areas
- widths
- wave devices
- 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
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6489—Compensation of undesirable effects
-
- 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
- H03H9/02858—Means for compensation or elimination of undesirable effects of wave front distortion
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
1512686 Surface wave transducers MULLARD Ltd 18 Aug 1975 34234/75 Addition to 1430725 Heading H3U To reduce wavefront distortion in a variableoverlap surface wave transducer 2, conductive areas 15, 16 are provided outside the region of finger overlaps but within the acoustic aperture of the transducer, the widths of areas 15, 16 along the direction of wave propagation being substantially equal to the sum of the widths of the electrodes for which they compensate. As shown, areas 15, 16 are integral with the bus bars of transducer 2, but they may be separate (Figs. 5, 6, not shown). Compensation may be provided for distortion of waves travelling in both directions from transducer 2.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3423475A GB1512686A (en) | 1975-08-18 | 1975-08-18 | Acoustic surface wave devices |
DE19762635192 DE2635192C2 (en) | 1975-08-18 | 1976-08-05 | Surface acoustic wave arrangement |
CA258,899A CA1089083A (en) | 1975-08-18 | 1976-08-11 | Acoustic surface wave devices |
JP9783476A JPS5224444A (en) | 1975-08-18 | 1976-08-18 | Surface acoustic wave device |
FR7625074A FR2321802A1 (en) | 1975-08-18 | 1976-08-18 | FILTER TAKING ADVANTAGE OF ACOUSTIC SURFACE WAVES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3423475A GB1512686A (en) | 1975-08-18 | 1975-08-18 | Acoustic surface wave devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1512686A true GB1512686A (en) | 1978-06-01 |
Family
ID=10363100
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3423475A Expired GB1512686A (en) | 1975-08-18 | 1975-08-18 | Acoustic surface wave devices |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5224444A (en) |
CA (1) | CA1089083A (en) |
DE (1) | DE2635192C2 (en) |
FR (1) | FR2321802A1 (en) |
GB (1) | GB1512686A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114611533A (en) * | 2022-01-28 | 2022-06-10 | 金陵科技学院 | Interdigital unilateral inclined weighted surface acoustic wave type Morlet wavelet processor |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1585087A (en) * | 1976-07-29 | 1981-02-25 | Plessey Co Ltd | Surface acoustic wave filters |
NL7810674A (en) * | 1977-12-21 | 1979-06-25 | Tektronix Inc | ACOUSTIC SURFACE WAVE DEVICE. |
US4205285A (en) * | 1978-11-03 | 1980-05-27 | Gte Laboratories Incorporated | Acoustic surface wave device |
JPS5654114A (en) * | 1979-10-11 | 1981-05-14 | Nec Corp | Reed screen shape converter of elastic surface wave |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1360235A (en) * | 1971-04-17 | 1974-07-17 | Marconi Co Ltd | Acoustic surface wave devices |
GB1430725A (en) * | 1974-08-02 | 1976-04-07 | Mullard Ltd | Acoustic surface wave devices |
GB1499330A (en) * | 1974-09-26 | 1978-02-01 | Plessey Co Ltd | Acoustic surface wave filters |
-
1975
- 1975-08-18 GB GB3423475A patent/GB1512686A/en not_active Expired
-
1976
- 1976-08-05 DE DE19762635192 patent/DE2635192C2/en not_active Expired
- 1976-08-11 CA CA258,899A patent/CA1089083A/en not_active Expired
- 1976-08-18 JP JP9783476A patent/JPS5224444A/en active Granted
- 1976-08-18 FR FR7625074A patent/FR2321802A1/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114611533A (en) * | 2022-01-28 | 2022-06-10 | 金陵科技学院 | Interdigital unilateral inclined weighted surface acoustic wave type Morlet wavelet processor |
Also Published As
Publication number | Publication date |
---|---|
FR2321802A1 (en) | 1977-03-18 |
JPS5224444A (en) | 1977-02-23 |
DE2635192A1 (en) | 1977-03-03 |
DE2635192C2 (en) | 1985-08-08 |
JPS5753003B2 (en) | 1982-11-10 |
FR2321802B1 (en) | 1982-03-12 |
CA1089083A (en) | 1980-11-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |
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