Host: The Ceramic Society of Japan
A Bleustein-Gulyaev-Shimizu (BGS) wave with only a shear-horizontal (SH) displacement has the property of complete reflection at the free edge of a piezoelectric ceramic substrate. It is considered that small-sized resonator filters without reflectors consisting of grating fingers can be realized by exploiting this characteristic of the BGS wave. We have realized BGS wave filters by solving many technical problems about manufacturing process, substrate material, chip design and so on.
