volume | PIER Journals

Abstract

In this paper, a 4-port multiple input multiple output (MIMO) antenna with dual-notched bands and high interference rejection features is presented for ultra-wideband and beyond. The total volume of the intended antenna, computed at 2.63 GHz, is 0.52λ × 0.52λ × 0.014λ. The basic radiating element consists of a spatula-shaped patch etched with a U and an inverted U-shaped slots printed on the top of a dielectric substrate, which is backed by defected partial ground plane. With the goal of achieving good polarization diversity and high isolation, four identical basic elements are arranged in orthogonal way to form the MIMO configuration. The inter-element isolation has been improved by a swastik-shaped decoupling structure with its arms extended in the form of meander-lines. As a result, the isolation between diagonal and orthogonal elements is better than 20 dB and 25 dB, respectively with envelope correlation coefficient < 0.012 and diversity gain > 9.94 dB. The suggested antenna attains an impedance bandwidth of 2.63-18.44 GHz with ability to shield interferences from 3.38-3.90 GHz and 4.65-6.45 GHz, specifically targeting frequencies associated with WLAN/ISM and Wi-MAX/LTE bands, respectively. Moreover, it exhibits maximum radiation efficiency and gain of 97.88% and 5.94 dBi, respectively in the working band.

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Ms. Chanprit Kaur

Dr. Raghvenda Kumar Singh

Dr. Kiran Kumar Verma