Abstract: The frequency band of the traditional class F and inverse class F power amplifiers is not wide, and the control of harmonics is relatively strict. Based on the theory of continuous power amplifiers, a power amplifier that operates at continuous class F and continuous inverse class F mode transferring is designed. The power amplifier is designed using Cree′s CGH40010F GaN HEMT transistor. The distribution of the harmonic impedance is controlled in the Smith chart by adjusting the harmonic tuned network at the output of the transistor,thus the in-band continuous class F and continuous inverse class F are simultaneously achieved. The results of the test board show that the gain is over 11 dB, the drain efficiency is between 55% -82%, and the output power is between 39. 5-41. 9 dBm within 2. 4-4. 2 GHz.