The importance of radio frequency power amplifiers (RFPAs) is a major component of transmitting systems, and their importance cannot be overstated. In the front circuit of the transmitter, the RF signal power generated by the oscillating circuit needs to be radiated to the antenna through a series of amplifications (buffer, intermediate amplification, and final amplification). RF power amplifiers must be used to obtain sufficiently large RF output power. The RF modulated signal is amplified to sufficient power by matching the network and then transmitted through the antenna.
The function of an amplifier is to amplify and output what is about to be input. The content of input and output, which we call a signal, is the contribution of a system like an amplifier to raise what it absorbs to a certain extent and output it to the outside world. If the amplifier can have good performance, then it can contribute more and thus reflect its value. If the amplifier has certain problems, then after starting work or working for a while, not only does not provide anything, but there may be some unexpected shock that is catastrophic to the outside world or the amplifier itself.
Output power and efficiency are the main technical indicators of RF power amplifiers. Usually in RF power amplifiers, the fundamental frequency or harmonics can be selected through the LC resonant circuit to achieve distortion-free amplification. Also, the harmonic components in the output should be as small as possible so as not to interfere with other channels.
