Design of Guard Antenna for Radar Applications

This paper proposes the design of a wideband and relatively wide beam Guard antenna for radar applications. The antenna has been designed around the concept of a Linear Resonant Slotted Waveguide Antenna. The antenna is required to work in the X band, covering a bandwidth of 500 MHz. The design and simulation have been done on HFSS. The return loss is less than 10 dB and the gain of the guard antenna is better than 14.6 dBi over the 500MHz band.