Patent ID: 7979043

Claim:
An integrated circuit (IC) comprising: an antenna; a receiver section; a transmitter section; and programmable antenna interface for coupling an antenna to a transceiver that includes a receiver section and a transmitter section, the programmable antenna interface comprising: a transformer, coupled to the antenna, that is adjustable in accordance with a control signal, wherein the transformer includes: a first winding having a plurality of first taps; a switching network that couples the first winding to a first port via a selected proper subset of the plurality of first taps; a second winding, magnetically coupled to the first winding, the second winding having a plurality of second taps; and wherein the switching network couples the second winding to a second port via a selected proper subset of the plurality of second taps; and a transmit/receive module that couples the transformer to the receiver section in a receive mode and to the transmitter section in a transmit mode; wherein the control signal controls the transformer to a first impedance in the transmit mode and controls the transformer to a second impedance in the receive mode.