JPS6484906A - Surface acoustic wave device - Google Patents
Surface acoustic wave deviceInfo
- Publication number
- JPS6484906A JPS6484906A JP24220187A JP24220187A JPS6484906A JP S6484906 A JPS6484906 A JP S6484906A JP 24220187 A JP24220187 A JP 24220187A JP 24220187 A JP24220187 A JP 24220187A JP S6484906 A JPS6484906 A JP S6484906A
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- pass filter
- electrode
- tap coefficient
- low
- 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
- 238000010897 surface acoustic wave method Methods 0.000 title 1
- 238000005070 sampling Methods 0.000 abstract 1
Landscapes
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
PURPOSE:To improve the low-pass filter characteristic by a simple electrode constitution by providing a dummy electrode between electrodes of an apodized electrode, and leading zero into a tap coefficient between the electrodes. CONSTITUTION:Two apodized electrodes 11, 12 are coupled by a multi-strip coupler 13. By inserting a dummy electrode 14 between the electrodes by which a prescribed tap coefficient is obtained, a prescribed tap coefficient 15 is obtained. A band-pass filter is formed to a structure which has been turned back, for instance, by 50MHz, zero is led in between the tap coefficients and a sampling frequency is divided into halves, and also, can be continued by the same code. As a result, a weighted function is realized as the electrodes 11, 12. In such a way, the electrodes 11, 12 of a low-pass filter characteristic are obtained by a comparatively simple structure, and a satisfactory low-pass filter can be realized.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24220187A JPS6484906A (en) | 1987-09-25 | 1987-09-25 | Surface acoustic wave device |
US07/249,024 US4841265A (en) | 1987-09-25 | 1988-09-26 | Surface acoustic wave filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24220187A JPS6484906A (en) | 1987-09-25 | 1987-09-25 | Surface acoustic wave device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6484906A true JPS6484906A (en) | 1989-03-30 |
Family
ID=17085770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24220187A Pending JPS6484906A (en) | 1987-09-25 | 1987-09-25 | Surface acoustic wave device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6484906A (en) |
-
1987
- 1987-09-25 JP JP24220187A patent/JPS6484906A/en active Pending
Non-Patent Citations (1)
Title |
---|
DAVIT P MORGAN SURFACE-WAVE DEVICES FOR SIGNAL PROCESSING ELSEVIER AMSTERDAM-OXFORD-NEW YORK-TOKYO=1985 * |
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