JPS5612116A - Elastic surface wave filter - Google Patents
Elastic surface wave filterInfo
- Publication number
- JPS5612116A JPS5612116A JP8704279A JP8704279A JPS5612116A JP S5612116 A JPS5612116 A JP S5612116A JP 8704279 A JP8704279 A JP 8704279A JP 8704279 A JP8704279 A JP 8704279A JP S5612116 A JPS5612116 A JP S5612116A
- Authority
- JP
- Japan
- Prior art keywords
- surface wave
- passing band
- piezoelectric substrate
- reentrant
- lambda
- 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.)
- Pending
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
- H03H9/02535—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)
Abstract
PURPOSE:To select a parameter so that while intervals of a reentrant frequency are greater than passing band width, the reentrant frequency is not in the passing band in terms of an elastic surface wave filter consisting of a piezoelectric substrate conducting a surface wave and reed screen type double electrodes. CONSTITUTION:The elastic surface wave filter consists of piezoelectric substrate 21 where surface wave 25 propagates and reed screen type double electrodes 22 provided to the surface of piezoelectric substrate 21. Further, depressions 13 appear because of out-of-phase coupling between volume wave 26, reflected several times, and surface wave 25. When the wavelength of the surface wave in the passing band, the repetitive period of each electrode finger constituting the reed screen type double electrodes, reentrant frequency and the period of depressions are denoted by lambda, (p), fR and DELTAfR, p/lambda should be greater than 0.5 and DELTAfR is made greater than the passing band width. Further, setting thickness (b) of the piezoelectric substrate and p/lambda to 0.78 is preferable so that fR will not be in the passing band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8704279A JPS5612116A (en) | 1979-07-10 | 1979-07-10 | Elastic surface wave filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8704279A JPS5612116A (en) | 1979-07-10 | 1979-07-10 | Elastic surface wave filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5612116A true JPS5612116A (en) | 1981-02-06 |
Family
ID=13903877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8704279A Pending JPS5612116A (en) | 1979-07-10 | 1979-07-10 | Elastic surface wave filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5612116A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10248472B4 (en) * | 2001-10-19 | 2016-09-29 | Denso Corporation | Structure of a screw fastening a rotary body to a rotary shaft |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52146188A (en) * | 1976-05-28 | 1977-12-05 | Kyoto Ceramic | Method of controlling bulk wave generating frequency of surface acoustic wave transducer element |
| JPS5399847A (en) * | 1977-02-14 | 1978-08-31 | Hitachi Ltd | Elastic surface wave device |
-
1979
- 1979-07-10 JP JP8704279A patent/JPS5612116A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52146188A (en) * | 1976-05-28 | 1977-12-05 | Kyoto Ceramic | Method of controlling bulk wave generating frequency of surface acoustic wave transducer element |
| JPS5399847A (en) * | 1977-02-14 | 1978-08-31 | Hitachi Ltd | Elastic surface wave device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10248472B4 (en) * | 2001-10-19 | 2016-09-29 | Denso Corporation | Structure of a screw fastening a rotary body to a rotary shaft |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5799813A (en) | Surface acoustic wave resonator | |
| JPS5693414A (en) | Elastic surface wave element | |
| JPS5612116A (en) | Elastic surface wave filter | |
| JPS5610724A (en) | Elastic surface wave transducer | |
| JPS56122215A (en) | Reed screen type electrode | |
| JPS5412542A (en) | Elastic surface wave unit | |
| JPS5717217A (en) | Cavity type elastic surface wave resonator | |
| JPS5654114A (en) | Reed screen shape converter of elastic surface wave | |
| JPS5711520A (en) | Elastic surface wave resonator | |
| JPS53123051A (en) | Filter for surface slip wave | |
| JPS57199316A (en) | Surface acoustic wave filter | |
| JPS55153418A (en) | Acoustic coupler | |
| JPS553280A (en) | Composite elastic surface wave filter | |
| JPS564916A (en) | Elastic surface wave filter | |
| JPS5621407A (en) | Dispersive type delay line | |
| JPS55120212A (en) | Surface-wave filter unit | |
| JPS5768925A (en) | Piezoelectric device | |
| JPS55162613A (en) | Surface elastic wave filter | |
| JPS55151810A (en) | Elastic surface wave filter | |
| JPS5711519A (en) | Constituent for elastic surface wave resonator | |
| JPS5463651A (en) | Elastic surface wave device | |
| JPS6482706A (en) | Surface acoustic wave narrow-band filter | |
| JPS5678220A (en) | Elastic surface wave device | |
| JPS5647118A (en) | Surface elastic wave filter of band-passing type | |
| JPS5467790A (en) | Elastic surface wave phase shifter |