| 摘要 |
A matching apparatus for matching impedances of a power amplifier and an antenna (load) of a terminal apparatus in which transmission power control (TPC) is carried out between a base station and a portable wireless telephone set. The matching apparatus can transmit output power at excellent output efficiency regardless of magnitude of any power of transmission output. A matching circuit provided between a power amplifier and a load includes a switching means, and impedances are switched and controlled by the switching means such that impedances may be suited to transmission output power required upon TPC and may be matched properly.
|
