| 摘要 |
PROBLEM TO BE SOLVED: To provide a general purpose impedance matching circuit that implements impedance matching over a wide frequency band and also applies to matching in a different neighboring band, and incorporates compact and low loss variable capacitance elements.SOLUTION: An impedance matching circuit 3 includes: a first variable capacitance element (C1) and a second variable capacitance element (C3) of a compact and low loss type disposed between a first inductive element (L1) and a second inductive element (L3) connected in parallel between an antenna 1 and a transmission/reception circuit 2; and a third inductive element (L2) connected in parallel with a third variable capacitance element (C2). |
