A small wideband inverted l-shaped flexible antenna for sub-6 GHz 5G applications

This manuscript carries out design and examination of flexible inverted l-shaped connected with a circular ring having plus-shaped geometry on the top left corner and a partial ground on the back. The antenna is realized on a flexible polyimide substrate which is fabricated for further investigation. The flexible resonator achieves a designed footprint of 20 × 30 × 0.2 mm3. The antenna is analyzed in terms of |S11|, 2D gain, radiation patterns, and efficiency under both normal and bend conditions. The antenna shows a decent match between experimental and software simulated data. To establish the use of the proposed design for 5G MIMO applications, an 8-port MIMO with the common ground is designed where the antenna shows satisfactory isolation >15 dB and ECC