Abstract: In this paper, we have proposed a phased antenna arrays of 4x4 square grid with circular patch for radar applications designed at 1.35 GHz frequency. The antenna array simulations are carried out by using HFSS software. FR4 epoxy with dielectric constant 4.4 and thickness 5.6 mm is used as substrate. Details of the antenna array design are presented and simulation results are discussed. Phased antenna arrays are useful for many types of applications such as Satellite navigation, Telecommunications, Aircraft surveillance, Amateur radio, Digital Audio Broadcasting and Astronomy.

Keywords: Phased arrays, beam steering, phase shifter.