ALEXANDRIA, Va., Aug. 25 -- United States Patent no. 12,719,141, issued on Aug. 25, was assigned to NEC Corp. (Tokyo) and National Institute of Advanced Industrial Science and Technology (Tokyo).

"Resonator and frequency-tunable resonator" was invented by Yohei Kawakami (Tokyo), Tomohiro Yamaji (Tokyo), Yoshiro Urade (Ibaraki, Japan) and Aiko Yamaguchi (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An object is to provide a stepped impedance resonator capable of efficiently reducing a footprint. A resonator includes a coplanar waveguide and a section. The coplanar waveguide has a first impedance. The section has a second impedance different from the first impedance and includes a fishbone waveguide. T...