Abstract: In order to improve the function distance, range and lessen disturbances from other directions, for meeting the needs of antennas in radars, a receiving and transmitting antenna system with special direction pattern is designed and optimized, adopting DFP-BFGS algorithm with unequally-spaced array. Then, a microstrip antenna array with TX and two RXs (RX1、RX2) integrated in a Rogers4350B material is designed and stimulated, forming special direction diagram in E-plane. At last, the triple-antenna is processed and tested, with result that the beam-forming in E-plane of the antenna array has a good effect, effectively improving the function distance and range of radar and lessening the disturbance of signals from other directions.