Tunable high-<Emphasis Type="Italic">Q</Emphasis> surface-acoustic-wave resonator

The feasibility of a tunable two-port surface-acoustic-wave resonator is analyzed theoretically and verified experimentally. The center frequency of the resonator is tuned by varying the equivalent length of its cavity. The variation of the center frequency achieved in the experiment is 25 kHz, with the width of the resonance peak being ≈4 kHz at a level of ?3 dB (the loaded Q factor of the resonator is ≈24600) and a frequency of ≈98 MHz. As a result of this study, a tunable resonator controlled by a static electric field that realizes the parameters predicted theoretically is designed. This resonator may serve as a basis for a stable tunable oscillator with a low phase noise.