The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2025
Filed:
Aug. 22, 2023
Choon Sae Lee, Dallas, TX (US);
Guang Yang, Dallas, TX (US);
Guan-guo Cheng, Torrance, CA (US);
Abstract
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 most of the power from the variable load to the output terminal with a phase change depending on the variable bias input of the loading. Such network to steer the input to the variable loading and send the signal reflected from the loading to the output port without much reflection includes a quadrature hybrid or a circulator.