Multiband impedance matching circuit

摘要

A multiband matching circuit of the present invention includes an inductive element (42) having one end connected to an input terminal (P2), a first switch (SWL) having one end connected to the other end of the inductive element and the other end grounded, a capacitive element (41) having one end connected to the input terminal (P2), a second switch (SWH) having one end connected to the other end of the capacitive element and the other end grounded, a first-band matching circuit (10L) that is connected between the other end of the inductive element (42) and a first output terminal (P1L) and performs impedance matching in a first frequency band, and a second-band matching circuit (10H) that is connected between the other end of the capacitive element (41) and a second output terminal (P1H) and performs impedance matching in a second frequency band higher than the first frequency band.