Abstarct: Power amplifier (PA) is one of the most important components of wireless communication systems. In today's wireless communication systems, systems with multiple carriers are used to transmit more information, in these systems, although the spectral efficiency increases, but when the power amplifier enters its nonlinear region, it causes undesirable distortions on the input signal, as a result, due to The nonlinearity of the power amplifier in the frequency domain, the spectrum of the output signal grows in the adjacent channels, which causes signal interference in the adjacent channel and thus information loss, which is measured by the adjacent channel power rate (ACPR) parameter. On the other hand, the power amplifier is the most consumed part of the transmitter, and its design with high efficiency is of particular importance, but considering that there is an inverse relationship between efficiency and linearity in the power amplifier, as a result, the power amplifier with high efficiency is more nonlinear; Therefore, in order to have high efficiency and at the same time linearity, the power amplifier can be designed with high efficiency and then using the linearization method to increase the linearity of the power amplifier, as a result, the linearization of the amplifier is very important. Due to the fact that today it is tried to implement the circuit design in the digital field due to its greater flexibility, therefore the digital pre-distortion (DPD) linearization method has been given special attention. The aim of this research is to design a power amplifier with high efficiency and suitable linearity. First, we will design a class AB power amplifier at 2 GHz frequency with a bandwidth of 200 MHz in ADS software, then by optimizing the dimensions of the output and input matching networks of the power amplifier to an efficiency higher than 57% in the mentioned bandwidth. then the mentioned linearization method will be implemented by the neural network in the MATLAB software and applied to the designed power amplifier. That would result in a 15 dB improvement in ACPR.