Abstract: An antenna array with metal grid applied to 33 GHz band is designed, and the grid structure is introduced through the design method of Taylor line source excitation amplitude, which is used to reduce the sidelobe level of the antenna and strengthen the anti-interference ability of the antenna. The final antenna array is composed of six antenna elements superimposed along the Y-axis direction, and the radiation capacity of the antenna array is enhanced after superposition. Finally, the grid antenna is conformed by the electric small plane analysis method, so as to reduce the volume of the antenna and make the antenna array fit the detection equipment better. The results of HFSS electromagnetic simulation show that the gain of the antenna array is 18.69 dB and the sidelobe level is -15.04 dB at about 33 GHz band.