ALEXANDRIA, Va., June 10 -- United States Patent no. 12,293,244, issued on May 6, was assigned to ZaiNar Inc. (Redwood City, Calif.).
"Radio-frequency system characterized by flat group delay for radio-frequency time synchronization and ranging" was invented by Philip Kratz (Redwood City, Calif.) and Mainak Chowdhury (Redwood City, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A radio-frequency system including: a self-complementary antenna characterized by an input impedance substantially independent of signal frequency across an operational frequency band; a passive coupling device characterized by a characteristic impedance and configured to couple the self-complementary antenna to a signal genera...