ALEXANDRIA, Va., June 9 -- United States Patent no. 12,289,100, issued on April 29, was assigned to Soitec (Bernin, France).
"Resonant cavity surface acoustic wave (SAW) filters" was invented by Sylvain Ballandras (Besancon, France) and Thierry LaRoche (Besancon, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A coupled cavity filter structure that uses a surface acoustic wave, in particular, a guided surface acoustic wave, comprises an acoustic wave propagating substrate, at least one input transducer structure and one output transducer structure, provided over the substrate, each comprising inter-digitated comb electrodes, at least one reflecting structure comprising at least one or more metallic str...