Open AccessEquilateral triangular dielectric resonator based co‐radiator MIMO antennas with dual‐polarisation
Author(s) -
Sharma Abhishek,
Sarkar Anirban,
Biswas Animesh,
Jaleel Akhtar Mohammad
Publication year - 2018
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2018.5035
Subject(s) - physics , dielectric resonator antenna , optics , bandwidth (computing) , reflection coefficient , dielectric resonator , axial ratio , mimo , resonator , electrical engineering , telecommunications , circular polarization , engineering , microstrip , channel (broadcasting)
In this study, two types of dielectric resonator antennas (DRAs) with dual‐polarisation are proposed and investigated for multiple‐input multiple‐output (MIMO) applications. The first design is a dual‐slant polarised DRA and exhibits the measured impedance bandwidth of 8.2% (5.27–5.72 GHz) and 11.2% (5.05–5.65 GHz) for Port1 and Port2 , respectively. Across the operating frequency band, the isolation between the input ports is better than 22 dB and the measured gain of the antenna varies in the range of 5.99–6.38 dBi. The second design developed here is a dual‐linearly polarised DRA which is able to provide horizontal and vertical polarisations and is realised by integrating a two‐stage rat‐race coupler with the DRA for excitation purpose. In this case, the measured impedance bandwidths are 11.81% (5.18–5.83 GHz) and 15.18% (4.93–5.74 GHz) for Port1 and Port2 , respectively, and the inter‐port isolation is better than 20 dB throughout the operating frequency band. The antenna exhibits the measured gain variation of 5.94–6.48 dBi for Port1 and 5.54–5.86 dBi for Port2 . Furthermore, for both the antennas, the envelope correlation coefficient is below 0.0004 throughout the bandwidth and the total active reflection coefficient is better than −10 dB, confirming the good diversity and radiation performance.