K. Higaki et al., HIGH-POWER DURABILITY OF DIAMOND SURFACE-ACOUSTIC-WAVE FILTER, IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 44(6), 1997, pp. 1395-1400
The power durability of the ZnO/diamond surface acoustic wave (SAW) fi
lter was investigated and compared with the LiTaO3 SAW filter. The ZnO
/diamond SAW filter maintained linearity of the input-output relation
up to the input power of 36 dBm at 2.90 GHz, whereas the LiTaO3 SAW fi
lter, which operated at 822 MHz, was nonlinear above the input power o
f 23 dBm and degraded significantly at 27.7 dBm. The input power depen
dence of the time to failure was also investigated for both SAW filter
s. It was found that the ZnO/diamond SAW filter was durable for 8 dB h
igher input power than that of the LiTaO3 SAW filter even at 3.5 times
higher frequency. These results indicate the extremely high power dur
ability of the ZnO/diamond SAW filter.