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. 05, 2019
Filed:
Sep. 20, 2017
Newport Fab, Llc, Newport Beach, CA (US);
Paul D. Hurwitz, Irvine, CA (US);
Roda Kanawati, Irvine, CA (US);
Newport Fab, LLC, Newport Beach, CA (US);
Abstract
A non-linear shunt circuit is coupled in a shunt-type configuration (e.g., parallel to an RF switch shunt branch) between a main signal line and ground in an RF circuit, and includes a harmonic cancellation element (HCE) (e.g., back-to-back diodes or diode-connected FETs) configured to cancel third harmonics generated on the main signal line by operation of an RF switch. The RF switch includes a series branch made up of multiple FETs coupled in series in the main signal line between a transmitter/receiver circuit and an antenna. The HCE is coupled to the main signal line either by way of a mid-point node or an input/output terminal of the RF switch's series branch. The non-linear shunt circuit also includes optional protection circuits that provide frequency-independent impedance through the HCE. Various techniques (e.g., active biasing) are optionally utilized to increase effectiveness to a wider range of the switch input power levels.