Patent Number: 8,792,836

Title: Front end module with compensating duplexer

Abstract: A front end module includes a duplexer and a balancing network. The duplexer includes a compensation circuit and a transformer three windings having five nodes. The first node for operably coupling an antenna to the first winding; the second node operable to receive an outbound wireless signal and operably couples the first winding to the second winding; the third node operably couples the second winding to a balancing network; the fourth node operably coupled to output a first signal component corresponding to an inbound wireless signal from the third winding; and the fifth node operably coupled to output a second signal component corresponding to an inbound wireless signal from the third winding. The duplexer provides electrical isolation between the first and second signal components and the outbound wireless signal. The compensation module is operable to compensate the electrical isolation between the first and second signals and the outbound wireless signal.

Inventors: Mikhemar; Mohyee (Irvine, CA), Darabi; Hooman (Laguna Niguel, CA)

Assignee: Broadcom Corporation

International Classification: H04B 1/44 (20060101); H04B 1/46 (20060101)

Expiration Date: 7/29/12018