Small-aperture focusing chirp transducers vs. diffraction-compensated beam compressors in elastic SAW convolvers
Abstract
High performance has been achieved in SAW convolvers using diffraction-corrected multistrip beam compressors. However, two different levels of metalization are required for optimum performance. A significant simplification of device fabrication was achieved with the design of convolvers using small-aperture chirp transducers, which require only one metalization layer. A design procedure is described that makes the transducers focusing to minimize diffraction loss. Experimental results are presented, which show that performance of this new design surpasses conventional designs in several respects.
- Publication:
-
IEEE Transactions on Sonics Ultrasonics
- Pub Date:
- September 1985
- Bibcode:
- 1985ITSU...32..675G
- Keywords:
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- Compressors;
- Design Analysis;
- Surface Acoustic Wave Devices;
- Transducers;
- Acoustic Delay Lines;
- Chirp Signals;
- Optimization;
- Waveguides;
- Electronics and Electrical Engineering