Experimental investigation of super‐wideband 8‐port Multiple‐Input‐Multiple‐Output antenna with high isolation for future wireless applications including Internet of Things
Tathababu Addepalli, Manish Sharma, Anveshkumar Nella, Ambresh P. Ambalgi, Prabhakara Rao Kapula
Abstract
Summary The paper reports an experimental investigation of an 8 × 8 MIMO antenna fabricated on a commercially available FR4 substrate. A fractal printed monopole radiator is introduced as a good prospect for super‐wideband (2.85–20.0 GHz) multiple‐input‐multiple‐output (SWB‐MIMO) configuration. The MIMO antenna is printed on both the planes (Plane A and Plane B) where four antennas are printed on Plane A and remaining on Plane B which are fed asymmetric to achieve wider impedance bandwidth. An inverted‐L type strip is embedded in a rectangular elliptical slotted ground to match the impedance. Also, a circular ring is embedded on both planes with a novel stub connected to each antenna ground providing isolation of more than 30 dB. The diversity performance of the antenna is also investigated with measured envelope correlation coefficient (ECC) < 0.025, directive gain (DG) > 9.995 dB, total active reflection coefficient (TARC) < −40 dB, and channel capacity loss (CCL) < 0.30b/s/Hz in the entire operating band.