ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,476,618, issued on Nov. 18.
"Phase shifter and electronic switch" was invented by Choon Sae Lee (Dallas), Guang Yang (Dallas) and Guan-Guo Cheng (Torrance, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A phase shifter that relies on a reflected wave from a load such as a varactor with a capacitance varied by an external bias voltage is provided. The phase shift does not depend on the wave propagation through an active medium. The input RF signal is sent to the variable loading and the reflected wave from the load is channeled to the output port via a network that takes the input signal without much reflection to the input terminal but passes mos...