Abstract: In this paper, we have proposed a dual frequency wide band circular patch antenna array of 4 elements for radar applications designed at Ka Band The antenna array simulations are carried out by using HFSS software. FR4 epoxy with dielectric constant 4.4 and thickness 0.21 mm is used as substrate. Details of the antenna array design are presented and simulation results are discussed. Antenna arrays at Ka Band are useful for many types of applications such as communication Satellites, Vehicle speed detection systems, High-resolution and close range targeting radars aboard military airplanes.
Keywords: Antenna Array, HFSS, Radar.