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:
Jun. 16, 2020
Filed:
Apr. 10, 2019
Qorvo Us, Inc., Greensboro, NC (US);
Kelly M. Lear, Longwood, FL (US);
Jeffrey D. Galipeau, Apopka, FL (US);
Qorvo US, Inc., Greensboro, NC (US);
Abstract
A high isolation duplexer/quasi circulator with two quadrature couplers is disclosed. Isolation between a transmit (TX) port and receive (RX) port of the quasi circulator is improved through use of two quadrature couplers. The quadrature couplers are coupled such that a first TX-RX signal path (from the TX port to the RX port) is shifted at or near 180 degrees from a second TX-RX signal path. These paths cancel each other to provide a high level of isolation between the TX port and the RX port. There are two signal paths between an antenna (ANT) port and the quadrature couplers for both TX signals and RX signals. A phase shift circuit is coupled to the ANT port of one or both duplexers such that the signals passing through the quadrature couplers to the ANT port are combined substantially in phase.