Automatic antenna coupler utilizing system for measuring the real part of the complex impedance or admittance presented by an antenna or other network

摘要

An automatic antenna coupler is described which includes a matching network having adjustable reactive elements. Control for these elements is provided by a system for detecting the real part of the complex impedance presented by the antenna or matching network. A logic and control system for adjusting the reactive elements is operated in accordance with the real part detector output so as to provide the desired impedance match.