Abstract: Design and implementation of an L-band phased array antenna on the satellite communication payload for LEO (Low Earth Orbit) Internet satellite-to-earth communication are finished in this paper. The antenna array consists of 4×4 square orthogonally symmetric dipole elements. The size of the array is 340 mm×340 mm. 15 elements form the receiving unit and one element is placed at one corner of the array as a transmitting unit. The electromagnetic simulation results show that the receiving antenna unit has a circularly polarized radiation performance. The antenna element′s VSWR is less than 1. 5 and axial ratio is less than 2 dB at the frequency range of 1. 60-1. 75 GHz; The gain of the array in the 120° scan range is in the range of 12. 7~16. 4 dB. The active phased array unit integrateal by passive antenna array and RF receiver is calibrated and tested in a microwave anechoic chamber. The test results show that the receiving phased array has achieved the correct beam direction and has a large-angle scanning feature of ±60°, and the active gain can reach 83 dB.