Wideband High Gain Antenna Array with Electromagnetic Band Gap Structures for Mutual Coupling Reduction

Abstract

Simple techniques for minimizing the drawbacks of the patch antenna and antenna arrays are been proposed in this communication. The limitations in a basic patch antenna like gain, bandwidth along with mutual coupling effects which are observed in microstrip antenna array are been addressed in this paper. The space in between the ground and substrate layers is increased to enhance the gain and a meandered rectangular patch is considered to enhance the bandwidth.  Electromagnetic band gap (EBG) structures are been proposed to minimize  the mutual coupling. Basic patch antenna elements are be excited using a Coax feed.  From the simulated S parameters results the operating frequency of the proposed antenna ranges 1.30GHz to 1.39GHz with a bandwidth of 89MHz and a return loss value of 15.47dB is observed at the center frequency of 1.35GHz. Proposed antenna is having a gain 8.37dB at 1.35GHz. Low loss RT Duroid 5880 with a depth of 1.574mm and a dielectric constant of 2.2 has been used as substrate for the proposed antenna. For designing the  antenna parameters and analyzing the performance of the antenna Ansys HFSS tool has been used.