Open AccessCompact wideband circularly polarised dielectric resonator antenna
Author(s) -
Abedian M.,
Rahim S.K.A.,
Danesh S.,
Jamaluddin M.H.,
Islam M.T.
Publication year - 2017
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.2016.3803
Subject(s) - axial ratio , dielectric resonator antenna , wideband , optics , bandwidth (computing) , circular polarization , multi band device , coaxial , physics , resonator , dielectric , dielectric resonator , materials science , antenna (radio) , optoelectronics , microstrip , electrical engineering , telecommunications , engineering
A new geometry of compact wideband/dual‐band circularly polarised dielectric resonator antenna (DRA) is presented. First, a wideband DRA is realised by a rectangular dielectric resonator excited by a vertical coaxial probe feed which is supported by a small substrate. Circular polarisation is achieved by utilising a configuration of the DRA feed that excites orthogonal modes inside the DRA. A 3 dB axial‐ratio bandwidth of about 20.8% (9.05–11.14 GHz) is achieved. Second, extension to dual‐band circularly polarised operation is then realised by additionally removing a corner of the rectangular DRA at 45° and adding a floating parasitic strip. The experimental results demonstrate an impedance bandwidth of about 59.8% (6.57–12.18 GHz) and the dual 3 dB axial‐ratio bandwidths of about 10.6% (8.31–9.24 GHz) and 13.5% (10.18–11.66 GHz). The measured peak gain varies from 4.47 to 4.86 dBiC in the lower band and 4.33 to 4.91 dBiC in the upper band.