A carrier aggregation radio system is provided. The carrier aggregation radio system includes a transceiver having a main receiver, a diversity receiver and a carrier aggregation receiver. The carrier aggregation radio system further includes a control system adapted to command a radio front end to route diversity signals from a diversity antenna to the main and diversity receivers in a first mode and to command the radio front end to route carrier aggregation signals from the diversity antenna to the carrier aggregation receiver in a second mode. The control system may also command a third mode in which diversity signals are routed to the main and diversity receivers while carrier aggregation signals are routed to the carrier aggregation receiver.