Circuit for matching the load impedance of an electronic device

A system, comprising:

• an electronic device;
• a load;
• and
• a circuit coupled to the electronic device and the load and structured to match an impedance of the load, said circuit including:
• a sensor structured to detect a first value of a ratio between incident and reflected standing waves in transferring power from the electronic device to the load, said sensor being structure to provide first and second signals substantially proportional to amplitudes of the incident and reflected standing waves;
• an impedance network of variable resistances;
• and
• a control circuit coupled to receive the first and second signals from the sensor and structured to vary values of the resistances to lower said ratio between the incident and reflected standing waves to a second value that ensures the transfer of power from the electronic device to the load.

A method, comprising:

• matching an impedance of a load of an electronic device, the matching including:
• detecting a first value of a ratio between incident and reflected standing waves in transferring power from the electronic device to the load, the detecting including providing first and second signals substantially proportional to amplitudes of the incident and reflected standing waves;
• and
• lowering said ratio between the incident and reflected standing waves to a second value that ensures the transfer of power from the electronic device to the load by varying values of resistances of an impedance network coupled between the electronic device and the load based on the first and second signals.