Abstract: This paper analyzes the class F power amplifier and reconfigurable theory, and designs a new type of harmonic control network based on PIN switches. The harmonic control network mainly realizes the control of multiple harmonic components at different frequencies by adjusting the working state of the PIN switch, so as to improve the overall efficiency of the power amplifier. Based on this new harmonic control network, a class F reconfigurable power amplifier operating at 1. 75 GHz and 2. 45 GHz is designed using CREE′s CGH40010F GaN HEMT transistor, and is processed and tested. The actual measurement results show that under the operating frequencies of 1. 75 GHz and 2. 45 GHz, the saturated output power is more than 40. 5 dBm, the maximum drain efficiency is greater than 69%, the gain is better than 10. 3 dB, and the bandwidth is greater than 200 MHz.