| 摘要 |
<p>PROBLEM TO BE SOLVED: To achieve stabilized transmission characteristics while reducing power consumption and saving the space, without using an isolator and without providing a current detector for detecting the operation current of a power amplification circuit in a transmitter, and the like.SOLUTION: A transmitter includes a power amplification circuit (power amplifier) 10 for amplifying a high frequency signal, a variable load (transmission side variable load) 20 having one end connected with the output of the power amplification circuit 10, an antenna element 40 for transmitting the signal amplified by the power amplification circuit 10, a temperature sensor 50 for measuring the temperature of the power amplification circuit 10, and a control unit 60 for detecting variation of load state on the output side of the power amplification circuit 10 based on the information of temperature measured by the temperature sensor 50, and adjusting the characteristics of the variable load 20 so as to compensate for the variation.</p> |
