Technique for the suppression of three-pass signals in surface-acoustic-wave filters
Abstract
It is shown analytically that for any thickness of the interdigital transducer (IDT) electrodes, the level of three-pass signal suppression can be made appreciable by the proper choice of complex electrical loads of the transducers. These loads are shown to depend on the IDT electrode thickness. The theoretical conclusion is verified experimentally by studying an SAW filter with aluminum IDT on an ST-cut quartz substrate.
- Publication:
-
Zhurnal Tekhnicheskoi Fiziki
- Pub Date:
- December 1981
- Bibcode:
- 1981ZhTFi..51.2595P
- Keywords:
-
- Digital Filters;
- Electroacoustic Transducers;
- Insertion Loss;
- Multipath Transmission;
- Signal Reflection;
- Surface Acoustic Wave Devices;
- Acoustic Delay Lines;
- Capacitance;
- Solid Electrodes;
- Ultrasonic Wave Transducers;
- Electronics and Electrical Engineering