Design of Low Sidelobe Waveguide Slot Antenna Arrays

In this paper, a waveguide slot antenna array is designed, which is applied to the target detection of airport radar, and the working frequency is 15.14-15.24GHz. The antenna arrays consist of four 32-slot waveguide slot antennas side by side, and it is fed by a 1 to 8 port waveguide power divider. Combined with relevant antenna design theory and MATLAB software, the slot dimensions and offset are analyzed and determined. Then modeling and simulation are conducted in HFSS, and the array antenna is manufactured and measured. The measured results show that the antenna has a high gain and low sidelobe.