Design of a High Gain Low Sidelobe Microstrip Antenna Array at Ku-band

Aperture coupling feed and double-layer microstrip patch structure are applied to design microstrip antenna element and subarrays of microstrip antenna array with high gain low sidelobe and backlobe at Ku-band. Parallel feed and T-junction type power divider are used to design low sidelobe array by the principle of Dolph-Chebeshev distribution. The simulate results show that the relative bandwidth of the element (VSWR 1.5) reaches 25.6%. From the measurement results of subarray: the operational bandwidth (VSWR 1.5) are not less than 0.96GHz and the gain are about 24dB, which are in good agreement with the simulate results. The 256 elements microstrip antenna array with sidelobe in E-plain is simulated.