Aiming at the ground SATCOM vehicle terminal, a K/Ka-band phased array design scheme is proposed to provide satellite signal communication service for the user terminal. The phased array radar (PAR) transceiver system uses a single-fed broadband patch microstrip antenna for reception and a double-fed patch microstrip antenna for transmission; a 2×2 sub-array is formed by rotating a single array element; The phased array antenna scans in a cone of 360°in azimuth and 60°in elevation. The experimental results show that the scheme realizes the circular polarization function, has a compact structure, and improves the scanning axial ratio performance. The gain, impedance and axial ratio bandwidth of the array can reach 30%.