Patent ID: 8712356

Claim:
An apparatus comprising: a first integrated circuit comprising: a local oscillator configured to generate a local oscillator output signal; a transmit path having a phase control input, the transmit path being configured to receive the local oscillator output signal as an input, to generate a first radio frequency (RF) output signal based at least partly on the local oscillator output signal, and to provide the first RF output as an output of the first integrated circuit, wherein a phase of the first RF output signal is controllable based at least partly on a control input provided to the phase control input; and a receive path configured to receive the local oscillator output signal and a receive signal as inputs, wherein an input of the first integrated circuit is configured to receive the receive signal, wherein the receive signal is RF sampled from a second RF output signal having a phase component that is independent of the phase of the first RF signal, wherein the receive path is configured to generate a signal having a phase component that includes a relative phase difference between the first RF signal and the second RF signal as an output.