DGS Inspired Microstrip Antenna Array for Improved Radiation Properties

A simple, easy and flexible Defected Ground Structure (DGS) is proposed for rectangular arrays and demonstrated theoretically in here with the aim of achieving suppression of cross polarization resulting improved polarization purity in radiated fields. The employed DGS appears to be highly efficient in terms of suppressing Cross Polarization especially in H-plane. A [2×2] array has been designed having aspect ratio of 1.3 and showing 14 dB enhancement in the segregation between the co-polarization to cross-polarization dissemination with improved impedance Bandwidth.