Patent ID: 7977947

Claim:
Radio frequency (RF) circuitry that measures RF power in a first direction through RF power detection circuitry, the RF power detection circuitry comprising: current detection circuitry that: receives and measures the RF current; and utilizes the measured RF current to provide a first RF detection signal, wherein the first RF detection signal outputted by the current detection circuitry has a first phase shift applied by the current detection circuitry, such that the phase of the first RF detection signal differs from that of the RF current, wherein the RF detection signal has a first component that is representative of a component of the RF current in the first direction and a second component that is representative of a component of the RF current in a direction that is opposite to the first direction; voltage detection circuitry that: utilizes at least one of an RF input voltage and an RF output voltage to provide a second RF detection signal wherein the second RF detection signal outputted by the voltage detection circuitry has a second phase shift applied by the voltage detection circuitry, such that the phase of the second RF detection signal differs from that of the at least one of an RF input voltage and an RF output voltage, and wherein the second RF detection signal has a first component that is representative of a component of the RF voltage in the first direction and a second component that is representative of a component of the RF voltage in the direction that is opposite to the first direction; and combining circuitry that: provides a directional RF power detection signal, which is representative of the RF power in the first direction by summing the first and second RF detection signals, such that the second component of the first RF detection signal and the second component of the second RF detection signal substantially cancel one another.