| 摘要 |
PROBLEM TO BE SOLVED: To provide an impedance matching circuit with reduced complexity and a reduced number of circuit elements than conventional techniques while achieving a sufficient tuning range.SOLUTION: A circuit for matching impedance of planar antennas includes a first variable capacitive element connected between an input terminal and an output terminal in a signal path. A second variable capacitive element is connected between the signal path and ground. The input terminal of the signal path and the output terminal of the signal path are connected to the ground through an inductive element, respectively.SELECTED DRAWING: Figure 1 |
