Metamaterial and SIW inspired isolating fences for lateral de-coupling in MIMO antenna

This paper proposes seven isolating fences (IF) for MIMO using novel rotated complementary split ring resonators (RCSRR) and half-mode substrate integrated waveguides (HMSIW) for decoupling. The removing mutual coupling, especially in the lateral direction that is mainly due to surface and space waves is challenging in MIMO. The proposed method involves the RCSRR, HMSIW, and defected ground structure (DGS) to reduce the lateral mutual coupling. In terms of S parameters, radiation pattern, envelope correlation coefficient (ECC), diversity gain (DG), channel capacity, mean effective gain (MEG), and efficiency the performance of the MIMO antenna is examined. The proposed MIMO has the size of 35 x 48 x 1.6 mm3 is made of FR4 substrate material with a centre frequency of 10 GHz, a bandwidth (BW) of 12 GHz, and a gain in the range of 3.7-4.3 dBi.