Abstract: To meeting the requirement of the communication and radar detection application, the transmit channel in radar system shall have highly efficient output under communication and radar operation in the future, i. e. , the integrated multi-function radar. However, the non-constant envelope signals in wireless communication perform high peak-to-average power ratio, asking for the high efficiency at both back-off and saturation power levels in power amplifier (PA) operation. In this paper, a broadband highly efficient Doherty PA design with 10 watts internal matched transistor is proposed for the radar transmit channel. It is designed by broadband two-section input power divider and short-step Chebyshevs impedance transformer, verifying the capability of Doherty PA for radar and wireless communication application. It maintains the same 14% fractional working bandwidth and gives the 10% maximum efficiency improvement to the single-ended transistor. It also shows excellent characteristic for radar system.