Decoupling MIMO of Planar Array of Circular Microstrip Antenna for Wireless Applications

Abstract

This paper describes the creation and simulation of a circular patch antenna array designed for 5.8 GHz operation. The array incorporates three inset-fed microstrip circular patch antennas for beamforming, which helps to reduce the substantial path loss that exists in high-data-rate mm-5G mobile station environments. The configuration consists of three circular patch antenna arrays with separate strip line feeds. In the proposed design, a 7.2 mm-diameter circular patch is placed. To model the antenna array, a FR-4 substrate with a relative permittivity (εr) of 4.4 was employed. Strip line feeding techniques were applied, and the substrate's dimensions are 27 x 67 x 1.6 mm³. The acquired bandwidth is excellent for WLAN applications because it spans frequencies between 5.15 GHz and 6.56 GHz. Over the stipulated bandwidth, the measured gain reaches 4.1 dB with an input impedance of around 50 Ω. Strong agreement was established between the simulated results and experimental data. The design and simulation method made use of the Finite Element Method (FEM)-based High Frequency Structural Simulation (HFSTM) tool.