Dynamic real time tuning of antenna matching circuit in the receiving mode

We present a novel approach for adaptive tuning of receiving antenna impedance matching operating in a time-varying environment. Our approach utilizes perturbations of the tuning circuit to construct a system of two nonlinear equations. This system is then solved to determine the exact input impedance of the antenna. With this, the tuning circuit is then adjusted to match the antenna at the calculated input impedance. This cycle is repeated with a certain rate to take into account the dynamic surrounding environment in real time.