Highly isolated electrically compact UWB MIMO antenna for wireless communications applications

A multiple-input multiple-output Ultra-Wide Band (UWB) antenna with a compact size of 0.8λ x 0.7λ is proposed. The presented structure is constituted with patch geometry on a planar surface. The radiator consists of three counter U-shaped conducting strips united with a patch structure where two are positioned nearby and the third geometry covers the remaining conducting strips. A corrugated design has been created on a ground plane in which zigzag pattern slots are engineered to receive high isolation of more than 20 dB. The configured antenna radiates over a wide frequency spectrum of 3.10 GHz to 11.85 GHz. It offers a fractional bandwidth of 195% with a gain of 2.80 dBi, 3.08 dBi, and 2.72 dBi for targeted resonances. The antenna radiation patterns and MIMO diversity parameters are also presented. The acceptable values of ECC (<0.05 abs), MEG (-6 dB to -8 dB), CCL (<0.02 bits/sec/Hz) were found. The fabricated model was tested inside an anechoic chamber environment to receive the measured response with optimum accuracy through multiple iterations. The measured response shows a strong correlation with numerically computed responses finding the presented antenna suitable for WiMAX, WLAN (max protocol) and radar applications. • Proposed antenna has a compact size of 30 x 25 x 0.78 mm³, suitable for multiple-input multiple-output (MIMO) applications. • Antenna structure includes patch geometry with three counter U-shaped conducting strips integrated into the patch. • The ground plane features a corrugated design with zig-zag pattern slots to achieve high isolation exceeding 20 dB. • The antenna operates over a broad frequency range of 3.10 GHz to 11.85 GHz, offering a fractional bandwidth of 195%. • The antenna provides gains of 2.80 dBi, 3.08 dBi, and 2.72 dBi at targeted resonances. • The antenna's radiation patterns and MIMO diversity parameters are also presented, demonstrating its effectiveness in diverse applications. • The fabricated antenna model was tested in an anechoic chamber, showing strong correlation between measured and numerically computed responses. • The antenna is deemed suitable for WiMAX, WLAN, and X-band applications, based on its performance metrics