Vasudevan Kesavath

Abstract: A novel four-port multiple-input-multiple-output (MIMO) antenna system is designed using concentric square-ring patch antennas. All four ports are made to resonate at 2.4 GHz ISM band with an overall system dimension of 60×60×1.6 mm 3 . This design uses complementary split-ring resonator (CSRR) loaded on its ground plane for enhanced isolation of - 22 dB between patch antenna elements. CSRR reduces mutual coupling by about 6.5 dB. The antenna operates with a 2:1 VSWR bandwidth of 75 MHz centered at 2.45 GHz. This collocated antenna system satisfies MIMO diversity performance with low envelope correlation between its waveforms. The effectiveness of concentric rings in MIMO design along with proposed isolation enhancement technique is validated using measurements from a prototype.

TL;DR: In this paper, a compact multiband four port diversity-based antenna with high isolation between elements is proposed for multiple-input-multiple-output (MIMO) applications.

TL;DR: In this paper, a planar multiple input multiple output (PMIMO) antenna system employing polarisation and pattern diversity technique is proposed, which includes a dual polarised two-port cross-patch antenna and an orthogonally polarised 2-port square ring patch antenna.

TL;DR: In this paper, a novel idea for generating directional electromagnetic beam using a metamaterial absorber for enhancing radiation from a microwave antenna in the S-band is presented, which constitutes the well-known stacked dogbone doublet working in the absorption mode.

TL;DR: In this article, the authors examined computationally and experimentally the concept of metamaterial cover using an array of split ring resonators (SRRs) for enhancing the transmission in a stacked dipole antenna working in the S band.