Design of a high gain microstrip antenna array at Ku-band

Aperture coupling feed and double-layer microstrip patch structure are applied to design microstrip antenna element, 64 elements and 256 elements microstrip antenna array. Parallel feed and T-junction type power divider are used to design antenna array. The measured results of subarray antennas show that the operational bandwidth (VSWR les 1.5) is 1.32 GHz and the gain is not less than 24 dB which is accorded with the simulated results. The measured radiation patterns of 64 elements and 256 elements antenna arrays are presented.