METHOD FOR THE AUTOMATIC ADJUSTMENT OF A TUNABLE ADAPTATION CIRCUIT, AND AUTOMATIC TUNING SYSTEM USING THE SAME.

摘要

The invention relates to a method for automatically adjusting a tunable matching circuit with single input access and single output access, for example a tunable matching circuit with single input access and single output access coupled to an antenna of a radio transceiver. The invention also relates to an automatic tuning system using this method. The reactance of each adjustable impedance device of the tunable matching circuit is determined by at least one tuning control signal. In addition to the start symbol (21) and the end symbol (26), a flowchart of a chord sequence includes: a "generate initial values of tuning control signals" (23) processing, which uses an open loop control structure, and wherein a tuning control unit generates initial values of the tuning control signals; and a "generate subsequent values of the tuning control signals" processing (24), which uses a closed-loop control structure and an extremum search control algorithm, and wherein the control unit of agreement generates subsequent values of the chord control signals.