Design of Slotted Waveguide Antenna Array for Monopulse Radar

A slotted waveguide antenna array for a monopulse radar is presented. A monopulse mode is realized through two subarrays consisting of 24 linear resonant slotted waveguide antennas with longitudinal slots on the broad walls of the waveguides. The subarrays are excited using two feeding waveguides through inclined slots in the broad walls of the waveguides. The energy method was used to calculate the slots' coordinates. All simulations are completed in CAD Ansys HFSS. The calculated radiation sum and difference patterns in the E-and H- planes are presented.