5G MIMO Wearable Antenna for Enhanced Military Communication Systems

This paper presents the design and simulation of a compact, dual-band flexible MIMO antenna intended for wearable applications in the sub-6 GHz 5G spectrum. The antenna comprises five circular patch elements arranged in a radial configuration on an RTV silicone substrate, chosen for its mechanical flexibility and dielectric stability and suitability for comfortable use on the human body. Each patch incorporates structural enhancements including radial slotting, edge truncation, a folded monopole-like stub, and a shorting pin to achieve dual-band operation and bandwidth improvement. A quarter-wavelength transformer feed line is employed to ensure proper impedance matching. Simulation results indicate operating bands of 2.7–2.75 GHz and 3.38–3.99 GHz, with high far-field gain and directionality suitable for off-body communication in wireless body area networks (WBANs). The proposed design demonstrates potential for integration into wearable systems requiring high data throughput, spatial diversity, and mechanical conformity.