JPS5678224A - Elastic surface wave device - Google Patents
Elastic surface wave deviceInfo
- Publication number
- JPS5678224A JPS5678224A JP15438979A JP15438979A JPS5678224A JP S5678224 A JPS5678224 A JP S5678224A JP 15438979 A JP15438979 A JP 15438979A JP 15438979 A JP15438979 A JP 15438979A JP S5678224 A JPS5678224 A JP S5678224A
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- surface wave
- elastic surface
- electrode
- lambda0
- 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
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6406—Filters characterised by a particular frequency characteristic
- H03H9/6413—SAW comb filters
-
- 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
- H03H9/02637—Details concerning reflective or coupling arrays
- H03H9/02685—Grating lines having particular arrangements
- H03H9/02708—Shifted grating lines
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
PURPOSE:To attain wide-range used by increasing greatly the degree of freedom as to the setting of the peak frequency position of a comb line characteristic filter by a elastic surface wave. CONSTITUTION:Output electrodes 18 and 19 constituting the 1st electrode group are connected in parallel at distance X on the same propagation line and equal in opening length W. On the propagation line adjoining to that of electrodes 19 and 20, electrodes 20 and 21 forming the 2nd electrode group are similarly connected in parallel at distance X and share bas bar part 24 with electrodes 18 and 19. Their opening length W2 differs from W1 so that W1:W2=3<1/2>:1 and while electrodes 20 and 21 are closer to the output side than electrodes 18 and 19 by lambda0/4 where the electrode wavelength is lambda0, electrode 21 has the opposite polarity to three other electrodes. Thus, when the peak frequency position of comb line characteristics of a elastic surface wave is set, the great degree of freedom can be obtained and wide range use can be realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15438979A JPS5678224A (en) | 1979-11-30 | 1979-11-30 | Elastic surface wave device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15438979A JPS5678224A (en) | 1979-11-30 | 1979-11-30 | Elastic surface wave device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5678224A true JPS5678224A (en) | 1981-06-27 |
Family
ID=15583060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15438979A Pending JPS5678224A (en) | 1979-11-30 | 1979-11-30 | Elastic surface wave device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5678224A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6005326A (en) * | 1996-10-14 | 1999-12-21 | Nec Corporation | Surface acoustic wave device |
| EP1115200A2 (en) * | 2000-01-05 | 2001-07-11 | Fujitsu Limited | Surface acoustic wave filter |
-
1979
- 1979-11-30 JP JP15438979A patent/JPS5678224A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6005326A (en) * | 1996-10-14 | 1999-12-21 | Nec Corporation | Surface acoustic wave device |
| US6040651A (en) * | 1996-10-14 | 2000-03-21 | Nec Corporation | Surface acoustic wave device |
| EP1115200A2 (en) * | 2000-01-05 | 2001-07-11 | Fujitsu Limited | Surface acoustic wave filter |
| EP1115200A3 (en) * | 2000-01-05 | 2008-02-20 | Fujitsu Limited | Surface acoustic wave filter |
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