TWO-FREQUENCY IMPEDANCE MATCHING CIRCUIT

摘要

An impedance matching circuit comprises an output terminal connected with a load; an input terminal for receiving a signal for the load; a series resonance circuit consisting of a series capacitor and a series inductor connected in series with the series capacitor, the series resonance circuit being connected in series with the load viewed from the input terminal; and a parallel resonance circuit consisting of a parallel capacitor and a parallel inductor connected in parallel with the parallel capacitor, the parallel resonance circuit being connected in parallel with the load and the series resonance circuit viewed from the input terminal. This configuration solves the problem that the conventional impedance matching circuit cannot perform impedance matching at two frequencies. Since no transmission line is used, the circuit becomes compact for a low-frequency application.