Patent ID: 7859474

Claim:
A load modulator circuit, comprising: a first switching element and a second switching element, the first switching element including a first output terminal for the circuit, the second switching element including a second output terminal for the circuit; a first capacitor and a second capacitor, the first capacitor configured for being connected to the first switching element, the second capacitor configured for being connected to the second switching element, the first capacitor configured for shunting the first switching element via a first capacitive reactance, the second capacitor configured for shunting the second switching element via a second capacitive reactance; a current source configured for being connected to the switching elements, the current source configured for driving the output terminals; and a driver circuit configured for being connected to the switching elements, the driver circuit configured for driving the switching elements, wherein the load modulator circuit is suitable for connection to an electrically short, transmit antenna and a power amplifier, the load modulator circuit being configured for synthesizing an arbitrary capacitive reactance based upon a dynamically controllable, arbitrary phase angle between a switch drive signal provided by the driver circuit and an incident Radio Frequency (RF) signal provided by the current source, said arbitrary capacitive reactance being utilizable for matching an impedance of the antenna to the power amplifier.