Patent ID: 9231680
Filing Date: 2016-01-05
CPC Classification: H04B

Claim Text:
1. A front end circuit for coupling antennas to a multi-channel time domain duplex radio frequency (RF) transceiver, the front end circuit comprising: a first channel module selectively connecting a first transmit line, a first primary receive line, and a first secondary receive line of the transceiver to the antennas; and a second channel module selectively connecting a second transmit line, a second primary receive line, and a second secondary receive line of the transceiver to the antennas, wherein the first channel module corresponds to a first predefined operating frequency of the transceiver and the second channel module corresponds to a second predefined operating frequency of the transceiver, the first predefined operating frequency being offset from the second predefined operating frequency, the first channel module and the second channel module operates simultaneously at different operational frequencies; and independently controllable switching elements each part of and shared by both the first channel module and the second channel module.