A Review of Circularly Polarized Dielectric Resonator Antennas: Recent Developments and Applications

Rahman, Nur Atiqah Abdul; Yasin, Mohd Najib Mohd; Ibrahim, Imran Mohd; Jusoh, M.; Noor, Shehab Khan; Mary, Mervin Retnadhas Ekscalin Emalda; Zamin, Norshuhani; Nurhayati, N.

doi:10.3390/mi13122178

Cited by 5 publications

(1 citation statement)

References 113 publications

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“…were proposed [8][9][10][11][12] for achieving this pattern diversity, the dielectric resonator antennas (DRAs) came into limelight in recent years. This is because the DRAs offer many advantages in terms of smaller size, improved bandwidth, ease of fabrication and low loss compared to conventional antennas [13,14]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Dual‐band pattern diversity liquid antenna with passive beam‐steering of the broadside modes

Gudivada,

Huang,

Wang

et al. 2023

IET Microwaves Antenna & Prop

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A dual‐band liquid cylindrical dielectric resonator antenna with pattern diversity at two different frequency bands is proposed using the lower order and higher order modes of the HEM and TM modes namely HEM11δ, HEM12δ+1, HEM31δ+1, HEM13δ, TM01δ, and TM02δ. The proposed antenna is designed to cover the GPS L2 band and the lower Wi‐Fi band at 1.227 and 2.4 GHz frequencies, respectively. The HEM modes which constitute the primary radiating modes achieved around 20.84% and 19.35% impedance bandwidth at lower and higher bands, respectively. In the later stage, beam‐steering is performed, whereby the realised broadside HEM modes at both lower and higher bands were passively steered with simple physical re‐orientation of the antenna structure. For this, the liquid's natural fluidic property of adhering to gravity is taken as an advantage which makes the proposed antenna adaptively steer its radiation pattern always towards the sky, irrespective of the tilt angle of the antenna. This concept of passively steering two modes at two different frequency bands without the use of any mechanical, electrical, or other associated components is presented for the first time.

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