Patent ID: 8725085
Filing Date: 2014-05-13
Classification: H04B

Abstract:
1. A front-end module (FEM) comprises: a first frequency band power amplifier (PA) configured to amplify a first frequency band outbound radio frequency (RF) signal; a second frequency band PA configured to amplify a second frequency band outbound RF signal; a first frequency band receiver-transmitter (RX-TX) isolation module configured to isolate a first frequency band inbound RF signal from the first frequency band outbound RF signal in accordance with a first frequency band isolation tuning signal; a second frequency band RX-TX isolation module configured to isolate a second frequency band inbound RF signal from the second frequency band outbound RF signal in accordance with a second frequency band isolation tuning signal; and an antenna interface unit operably tuned in accordance with an antenna interface tuning signal to: wherein each of the first and second RX-TX isolation modules comprises: