Design Method of Large Millimeter-wave Waveguide Slot Array

In order to reduce the complicated work in designing large waveguide slot array,this paper presents a new kind of method for designing large millimeter-wave waveguide slot array based on Robert S Elliott design method.The theory of transmission line is employed to construct an approximate expression of load impedance,the numerical iteration method is used to calculate the normalized admittance,and the radiation slots are designed.The coupling feeding network is designed by using electromagnetic simulation software.The design process takes less computation and time.A 32×16 slot array operated at 35.3~39.5 GHz is designed,manufactured and tested.The measurement results show a bandwidth of 10.6%.The 3dB beadwidths of the H-plane and E-plane radiation patterns are 4.2° and 2.2° respectively.