CHARACTERISTICS OF BLEUSTEIN-GULYAEV-SHIMIZU WAVE RESONATORS ON CERAMICS AT HIGH-FREQUENCIES

At frequencies above 60 MHz, tuning-free surface acoustic wave (SAW) r esonators with many reflectors using Rayleigh SAW are generally used. However, Rayleigh SAW resonators for use in the 60-150 MHz range have some disadvantages such as cost. We have already developed a BGS wave resonator, which is being used commercially in the 30-60 MHz range. Wh en we improved the characteristics of BGS wave resonators by using sma ll-particle; poreless ceramic substrates developed for high-frequency BGS waves, we obtained good resonance characteristics up to 160 MHz. W e also obtained good characteristics when we tested the resonator in a DECT demodulator circuit.