Design and analysis of a Tri-band G-shaped Monopole antenna for bandwith improvement for wireless applications of measurement parameters in MIMO environment

A Tri-band G-shaped Microstrip Monopole antenna suitable for the ISM band wireless applications in MIMO environment is presented in this paper. The novelty contributed in this work is the appropriate selection of dielectric substrate, the logical modifications in the existing antenna length and width, and the connection of the ground planes on both sides of the existing G-shaped antenna. The proposed antenna is fed with CPW waveguide and the parameters have been optimized so that resonant modes with wider bandwidths suitable for applications at lower, mid and the upper end of the ISM band can be achieved. The proposed antenna is simulated and its performance is analyzed by measuring various antenna parameters such as bandwidth, directivity, gain, radiation pattern and return loss. The performance parameters of the proposed antenna are assessed at 2.4/2.45/4.2/5.85/6.07 GHz. The results at the lower-band of ISM band (2.2144-2.687 GHz) show a bandwidth improvement of 19.69% with a bandwidth of 472.6 MHz, an improvement of 29.39% with a bandwidth of 1.235 GHz is evident at the middle of ISM band (3.8504-5.0854 GHz), and the highest bandwidth improvement of 40.79% with 2.478 GHz bandwidth in the upper end of ISM band (5.0854-7.5632 GHz) is noticed. The antenna will be fabricated and tested in future.