Analysis of SAW distributed feedback resonators
Abstract
The main characteristics and advantages of the surface acoustic wave (SAW) distributed feedback resonator are discussed. A coupled mode analysis provides physical insight and simple formulas for the resonant frequency, the quality factor, and the input impedance. Those results are verified by means of a transmission line computer model and by a number of measurements in the frequency range 30-250 MHz. On YZ LiNbO3 substrates, quality factors of the order of 5,000 are routinely obtained.
- Publication:
-
IEEE Transactions on Sonics Ultrasonics
- Pub Date:
- January 1981
- Bibcode:
- 1981ITSU...28...42V
- Keywords:
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- Coupled Modes;
- Feedback Circuits;
- Resonant Frequencies;
- Resonators;
- Surface Acoustic Wave Devices;
- Computerized Simulation;
- Electrical Impedance;
- Lithium Niobates;
- Reflectors;
- Transducers;
- Transmission Lines;
- Instrumentation and Photography