Abstract
Surface acoustic wave (SAW) filters based on diamond which has very high SAW velocity have been investigated. 2.5 GHz low loss narrow-band filter and 1.5 GHz IF filter were demonstrated by the SiO/sub 2//ZnO/diamond structure with zero temperature coefficient of frequency and the ZnO/diamond structure, respectively. The super-high power durability of the ZnO/diamond structure was also confirmed at 2.9 GHz. Diamond SAW filters having high velocity and high power durability, can be expected for broad applications in future high frequency communication systems.
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