SURFACE ACOUSTIC WAVE RESONATOR HAVING DESIRED BANDWIDTH RATIO AND METHOD OF MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To realize a VCO that is excellent in a low noise characteristic by providing a resonator in which a Q value is excellent and a bandwidth ratio ranges between 0.038 and 0.132, especially a resonator in which a bandwidth ratio ranges between 0.064 and 0.105. SOLUTION: An interdigital electrode formed on aθdegree turned Y-cut lithium niobate signal crystal piezoelectric board is composed of a metal film primarily made of aluminum and uses a surface acoustic wave resonator in which the relation between the film thickness (h) of an electric finger and the pitch (p) of the electric finger is 0.12