SAW resonators utilizing withdrawal weighted reflectors
Abstract
Withdrawal weighted reflectors have been utilized in the fabrication of two-part surface acoustic wave (SAW) resonators on quartz. A method for compensating for velocity differences is presented, withdrawal selection criteria and reflector length are discussed, and several weighting functions are studied. Theoretical and experimental results are given comparing several resonators with uniform and withdrawal weighted etched-groove reflectors. The design methods are shown to be effective in applying this type reflector to reduce the off-resonance ripple from 8.0 to about 1.4 dB.
- Publication:
-
IEEE Transactions on Sonics Ultrasonics
- Pub Date:
- November 1979
- Bibcode:
- 1979ITSU...26..404T
- Keywords:
-
- Cavity Resonators;
- Electroacoustic Transducers;
- Quartz Transducers;
- Reflectors;
- Surface Acoustic Wave Devices;
- Weighting Functions;
- Frequency Response;
- Graphs (Charts);
- Microwave Filters;
- Microwave Resonance;
- Electronics and Electrical Engineering