Experimental Analysis of Rectangular and Circular Microstrip Patch Antenna with Superstrates

V. Saidulu

doi:10.37591/rtecs.v7i3.5405

Abstract

This paper focusing on the experimental analysis of rectangular and circular microstrip patchantennas with and without radome (superstrate). The proposed antennas were designed at2.4GHz, using HFSS simulation software and fabricated on Arlon DiClad 880 substratewhose dielectric constant is 2.2, loss tangent is 0.0009 and thickness of the substrate is1.6mm. Placing different dielectric constant of the superstrates above the patch antennasperformance characteristics have been studied of both antennas on the basis of resonantfrequency, gain, bandwidth, beam width, input impedance, return loss and VSWR etc. Theeffect of radome or superstrate with and without studied on both antennas and compared theirperformance characteristics. When placing radome (superstrates) above the substrate, theresonant frequency is altered and the performance decreased, return loss and VSWR areincreased. The transmission line model and cavity model analysis are used for designing ofrectangular and circular patch antennas. The experimental result observed the higher gain isobtained for rectangular microstrip patch and higher bandwidth is obtained for circular patchantenna using same dielectric constant at ∈r1 =2.2. The 2.4 GHz frequency range used forwireless communications applications.