Integrated real power detector

A method comprising:

• configuring a first coupling element to couple a first voltage sampled from a first node of a matching network to an input of a first down-conversion mixer,
• configuring a second coupling element to couple a second voltage sampled from a second node of the matching network distinct from the first node to an input of a second down-conversion mixer, wherein the matching network couples an output of an amplifier to a load, and wherein the first and second down-conversion mixers are disposed in a receive signal path between a radio frequency input and a baseband processor;
• down-converting the two first and second sampled voltages in frequency using the first and second down-conversion mixers;
• calculating a real power delivered to the load from the down-converted voltages;
• storing a coefficient derived from comparing the calculated real power to an actual power;
• configuring the first and second coupling elements to decouple the first and second voltages from the inputs of the first and second down-conversion mixers;
• adjusting the amplitude or phase gain of a transmit element using the stored coefficient;
• and
• down-converting a received signal using the first and second down-conversion mixers.

An apparatus comprising:

• means for matching the output of an amplifier to a load;
• means for processing a baseband signal;
• first means for selectively coupling or decoupling a first voltage sampled across the means for matching to an input of a first and down-conversion mixer in a receive signal path between a radio frequency input and the means for processing a baseband signal;
• and second means for selectively coupling or decoupling a second voltage sampled across the means for matching to an input of a second down-conversion mixer in the receive signal path between the radio frequency input and the means for processing a baseband signal,
• wherein the first voltage is distinct from the second voltage, and
• wherein the means for processing a baseband signal comprises means for calculating a real power delivered to the load from the down-converted voltages.