JPS55105426A - Elastic surface wave device - Google Patents
Elastic surface wave deviceInfo
- Publication number
- JPS55105426A JPS55105426A JP1259679A JP1259679A JPS55105426A JP S55105426 A JPS55105426 A JP S55105426A JP 1259679 A JP1259679 A JP 1259679A JP 1259679 A JP1259679 A JP 1259679A JP S55105426 A JPS55105426 A JP S55105426A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- surface wave
- crystal
- axis
- wave device
- 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.)
- Granted
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
- H03H9/02834—Means for compensation or elimination of undesirable effects of temperature influence
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/30—Time-delay networks
- H03H9/42—Time-delay networks using surface acoustic waves
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
PURPOSE:To enhance the frequency/temperature characteristics for the elastic surface wave device using the crystal, by selecting the crystal axis with the electrode film provided on the propagation line. CONSTITUTION:The electrode film thickness, the electrode finger width and the distance between electrode fingers of the transducer are referred to as h0, a and b respectively. And then the crystal plate is selected based on the relation between the equation using wavelength lambda and X=a.h0/(a+b).lambda and the cut-out angle theta of the crystal from the Z axis as theta=(-18707.5X<2>+21.429X+129.5) degrees. Thus no spurious is caused on such crystal plate to the surface wave of propagation of the X axis. Furthermore, the temperature property can also be increased by using the Au electrode. Also the electrode is provided on the propagation line of the surface wave, and thus the displacement can be concentrated onto the surface owing to the effect of the mass load of the electrode. Thus the loss can be reduced. Here, the Au electrode can feature the power of influence of about 40 times as much as that of the Al electrode, and as a result an elastic surface wave device can be obtained with the long-time delay characteristics and with less amount of loss.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1259679A JPS55105426A (en) | 1979-02-06 | 1979-02-06 | Elastic surface wave device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1259679A JPS55105426A (en) | 1979-02-06 | 1979-02-06 | Elastic surface wave device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55105426A true JPS55105426A (en) | 1980-08-13 |
JPS6145892B2 JPS6145892B2 (en) | 1986-10-11 |
Family
ID=11809722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1259679A Granted JPS55105426A (en) | 1979-02-06 | 1979-02-06 | Elastic surface wave device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55105426A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5833309A (en) * | 1981-08-21 | 1983-02-26 | Toyo Commun Equip Co Ltd | Slip wave resonator |
-
1979
- 1979-02-06 JP JP1259679A patent/JPS55105426A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5833309A (en) * | 1981-08-21 | 1983-02-26 | Toyo Commun Equip Co Ltd | Slip wave resonator |
JPH0134411B2 (en) * | 1981-08-21 | 1989-07-19 | Toyo Communication Equip |
Also Published As
Publication number | Publication date |
---|---|
JPS6145892B2 (en) | 1986-10-11 |
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