Open AccessQuarter cylindrical dielectric resonator antenna with circular polarisation for wideband MIMO systems
Author(s) -
Belazzoug M.,
Messaoudene I.,
Aidel S.,
Denidni T.A.,
Kishk A.A.
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2019.3138
Subject(s) - wideband , axial ratio , optics , physics , dielectric resonator antenna , bandwidth (computing) , resonator , acoustics , circular polarization , electrical engineering , telecommunications , engineering , microstrip
In this Letter, a quarter cylindrical dielectric resonator antenna (Q‐CDRA) with a low profile and circular polarisation (CP) is presented for wideband and multiple‐input–multiple‐output (MIMO) systems. The approach used to obtain a reduced wideband CP antenna is realised by deforming the geometry of the CDR to a quarter cylinder and using a quasi‐spiral feedline to excite two resonant modes in phase quadrature (HEM 11 and HEM 12 ). The proposed design exhibits a wide‐impedance bandwidth (BW) of 34% (4.4–6.2 GHz) with a low measured coupling level<−15 dB, and an axial ratio BW of 24.4% (4.5–5.75 GHz). The antenna gain is stable through the operating BW with a gain peak of 6.4 dBi. In addition, the antenna has a low cross‐polarisation in the boresight direction with low envelope correlation coefficient<0.03. The presented design is suitable for RHCP WLAN applications.