High gain and highly directive microstrip patch antenna for radar and satellite communication

Abstract

We demonstrate a rectangular microstrip patch antenna with enhanced performance for radar and satellite communication. The FR-4 epoxy substrate-based antenna exhibits resonant frequency at 7.5 GHz with return loss of −63.83 dB. The implementation of defected ground structure yields wideband response with substantial increase in the percentage bandwidth from 6.13 to 39.17%. The designed antenna’s structure has significantly high gain and high directivity of 8.5 dB and 8.21 dBi, respectively. The rectangular patch, feedline, and ground components are of copper. The performance evaluation is done in terms of return loss, resonant frequency, gain and directivity. A comprehensive analysis on parametric alterations is carried out to obtain the optimized structure. The parametric analysis will be discussed thoroughly illustrating the effect on antenna performance. The structure is fabricated and tested using anechoic chamber integrated E5071C Network Analyzer. We found that the practical results match very closely with simulated results.