| 摘要 |
<p>Disclosed is a power amplifier insensitive to load impedance changes. According to the present invention, the power amplifier comprises: a power amplification circuit which amplifies an input signal; an output matching circuit which is connected to an output end of the power amplification circuit, and performs impedance matching between the power amplification circuit and an antenna load; and a four-port coupler which is connected between the output matching circuit and the antenna load.</p> |
