A linearly polarized slotted rectangular microstrip patch antenna for WLAN application

Abstract

A linearly polarized rectangular patch antenna having a small slotted geometry is discussed in this paper. The designed antenna can perform effectively from 3-4 GHz and the resonant frequency is a comparable find from 3.41 to 3.44 GHz, in which return loss is approximately -25 dB to -27 dB. The obtained bandwidth is approximately around 13%. The proposed antenna is designed on flame retardant FR-4 glass-reinforced epoxy dielectric material and fed by a simple coaxial probe feed method. In the patch, to design the desired path with suitable results like bandwidth, directivity and impedance matching a finite truncation ground technique is proposed. A 3.35 dB gain is obtained by providing a symmetric cut in a patch, which is quite an acceptable result obtained in such a frequency range. Further gain will be improved by varying the size material of the patch and substrate material. Various results due to ground truncation in plane or patch can be calculated and discussed in this paper, parameters like bandwidth, gain, efficiency and radiation characteristics. Mostly ground truncation is done to improve bandwidth parameters.

Keywords: LAN (local area network), WLAN (wireless local area network), MPA (microstrip patch antenna), NEMA (National Electrical Manufacturers Association), SAR (specific absorption rate), EMI (electromagnetic interference).

This article is published under the terms of the Creative Commons Attribution License 4.0