FR-4 based Single-Element Rectangular Microstrip Patch Antenna for ISM Band Applications

The design of a single-element rectangular microstrip patch antenna (SE-RMPA) for Industrial, Scientific and Medical (ISM) band frequency was proposed in this paper. This antenna was developed in order to acquire good gain, high directivity with a tolerable level of return loss(RL). The proposed antenna was designed fora 2.4GHz frequency band using Computer Simulation Technology (CST) software. The antenna design has primarily three parts they are ground plane, antenna patch design, thin microstrip feeding element of 50-ohm impedance. The substrate element is fabricated using FR-4 lossy dielectric material and the remaining parts are fabricated using Annealed copper. The proposed RMPAantenna was tested for various frequencies, about 2.4GHz, 4.8GHz, and 9.6GHz. The various performance parameters of the proposed antenna performance evaluation weredone based on return loss(RL), Voltage standing wave ratio(VSWR), gain, and directivity. Experimental results demonstrated the proposed RMPA antenna provided a return loss of –4.12 dB at 2.4GHz by using a lossy dielectric-substrate with a Ɛrvalue of4.3 and a height of 1.6mm. Correspondingly, the directivegain of the RMPA was 6.321dB. Moreover, the peak resonance frequency(Rf) of the proposed SE-RMPA ranges from 2GHz to 4.8GHz, which is well suited for ISM and wireless short-range applications.