Bandwidth enhancement of helix excited cylindrical dielectric resonator antennas by means of stacking

Motevasselian, Alireza

doi:10.1109/lapc.2012.6403042

Cited by 5 publications

(1 citation statement)

References 16 publications

(11 reference statements)

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“…In order to achieve better circular polarization, different DRA geometries has been explored such as hemispherical shaped DRA excited by spiral slot is studied theoretically using green function technique, 2 rectangular stair shaped DRA excited by narrow rectangular slot achieving 3-dB axial ratio bandwidth of 10.6%, 3 stacked cylindrical DRA excited by tape helix offering 11% axial ratio bandwidth, 4 cylindrical DRA excited by external tape helix, which offers axial ratio bandwidth of 6.4%. 5 Similarly, central part of DRA is removed for enhancing the axial ratio bandwidth in the Reference [6].…”

Section: Introductionmentioning

confidence: 99%

Wideband circularly polarized concentric cylindrical dielectric resonator antenna excited by helix

Pandey

Pathak

2021

Int J RF Microw Comput Aided Eng

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In this paper, a wideband circularly polarized two-layer concentric cylindrical dielectric resonator antenna (CDRA) is proposed for C-band applications. To generate the circular polarization in the CDRA, the proposed antenna is excited with four turn helical wire. The helix excites the two orthogonal modes (HE 11δ ) in quadrature phase, which result in the circular polarization. The four different design cases are investigated and the best one is fabricated and measured. The impedance bandwidth is improved when two-layer concentric CDRA is used. The simulated and measured bandwidth of the proposed antenna varies from 3.60 to 6.03 GHz with impedance bandwidth of 50.46% and 3.65 to 6 GHz (48.70% impedance bandwidth) respectively, while axial ratio impedance bandwidth are 43.13% (4.20-6.51 GHz) and 38.82% (4.40-6.52 GHz) respectively. The proposed antenna attains 10.9 dBi measured peak gain at 4.5 GHz. The fabricated prototype is experimentally measured and its results are found to be in good agreement with the simulation results.

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