Design and development of compact UWB-MIMO antenna with enhanced isolation for short distance V2X communications

This work presents the design and analysis of a compact Ultra Wide Band (UWB) Multiple Input Multiple Output (MIMO) antenna tailored for short-range vehicular communication applications. A key objective is to achieve high isolation and wideband performance in a limited form factor, addressing the challenges of mutual coupling and spatial constraints common in vehicle-mounted systems. The proposed three-port antenna, with dimensions of 26 × 50 × 0.8 mm3 on an FR4 substrate (εr=4.4), integrates DGS and elliptical slots to enhance isolation and bandwidth. Simulated using HFSS, the antenna operates across 3.6–10.06 GHz with isolation better than −43 dB and an ECC below 0.002. Performance metrics, such as diversity gain, TARC, radiation patterns, and time domain characteristics, confirm that the antenna's suitability for compact, high-throughput UWB transceivers was observed. The antenna's performance was examined in the presence of metallic bodies. Due to its low profile and satisfactory functionality, the suggested antenna is well suited to V2V Communications.