Patent ID: 7269391

Claim:
A transceiver front end comprises: a transmit/receive (T/R) switch operably coupled to an antenna for receiving inbound radio frequency (RF) signals and for transmitting outbound RF signals; a first balun having a single ended winding and a differential winding, wherein the single ended winding of the first balun is operably coupled to the T/R switch; a second balun having a single ended winding and a differential winding, wherein the single ended winding of the second balun is operably coupled to the T/R switch; a low noise amplifier (LNA) operably coupled to the differential winding of the first balun; a power amplifier operably coupled to the differential winding of the second balun; and compensation circuitry operably coupled to the first balun to compensate for at least one of phase imbalance, amplitude imbalance, and impedance imbalance of the first balun, wherein the compensation circuitry includes ground compensation circuitry operably coupling one node of the single ended winding of the first balun to a circuit ground, and wherein the ground compensation circuitry includes a capacitor, a die pad, and a bond wire coupled in series between the single ended winding of the first balun and the circuit ground such that the capacitor resonates with the bond wire at frequencies of the inbound and outbound RF signals to compensate for phase imbalance of the first balun.