Inverted L-shaped slotted microstrip patch antenna with DGSfor X-band applications

Abstract

In the paper, a Rectangular microstrip patch antenna under two operating frequencies for radar application is presented. The design model is included with double headed arrow DGS on the ground plane to advance the performance of the antenna. A low cost FR4 (Flame Retardant — Grade 4) material is used as the dielectric substrate. The range of X-band frequency is from 8 to 12 Gigahertz and is broadly used in radar and military applications. The proposed model is made to resonate under two frequencies in X-band. The Ansoft High Frequency Structural Simulator (HFSS) Version 12 software is used to design the model and to analyze the results. A return loss value of −18.16 dB and −30.55 dB is obtained for a frequency of 8.15 GHz and 10.84 GHz with a bandwidth of 280 MHz and 300 MHz respectively. The parameters like directivity, current distribution and gain are also explained in the paper.