Patent ID: 7812687

Claim:
A high-frequency switching circuit module comprising: a common input/output terminal; a plurality of input/output terminals; a high-frequency switch including a field-effect transistor switching element and being arranged to be selectively connected between the common input/output terminal and one of the plurality of input/output terminals; a multilayer substrate including a plurality of stacked dielectric layers and wiring electrodes; and a matching circuit; wherein the high-frequency switch includes a semiconductor chip and is arranged on at least one major surface of the multilayer substrate by flip-chip mounting via a bump portion; the matching circuit is disposed between the common input/output terminal and a circuit connected to the common input/output terminal and is not disposed between the plurality of input/output terminals and a circuit connected to each of the plurality of input/output terminals; and the matching circuit includes an inductor that is defined in the bump portion; the inductor is connected to the common input/output terminal and to an on-state input/output terminal of the switching element; and impedance matching between the common input/output terminal and the on-state input/output terminal is provided by correcting an electric capacitance in all of the plurality of input/output terminals of the switching element in an off-state.