Analysis of a Wideband Circularly Polarized Cylindrical Dielectric Resonator Antenna With Broadside Radiation Coupled With Simple Microstrip Feeding

Chowdhury, Rakesh; Mishra, Naveen; Sani, Mohammed Muzammil; Chaudhary, Raghvendra Kumar

doi:10.1109/access.2017.2752210

Cited by 45 publications

(26 citation statements)

References 15 publications

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“…In another study [12], a rectangular DR excited by a modified crossslot leading to a wide 3-dB ARBW of 24.6% and a gain of more than 5 dBic was presented. Two vertical microstrip lines arranged in a perpendicular fashion were also implemented to excite a cylindrical DR [13], reportedly showing a 3-dB ARBW of 24.6% with an average gain of 5.5 dBic. Another approach is to fabricate DRs with special geometries.…”

Section: Introductionmentioning

confidence: 99%

Single-Fed Circularly Polarized Dielectric Resonator Antenna With an Enhanced Axial Ratio Bandwidth and Enhanced Gain

et al. 2020

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A compact single-fed circularly polarized dielectric resonator antenna (DRA) with an enhanced 3-dB axial ratio bandwidth (ARBW) and gain is proposed. The DRA is implemented by joining a smaller dielectric resonator (DR) to one side wall of a main rectangular DR and is excited by an offset vertical metallic strip. With this configuration, two sets of degenerate orthogonal modes, the TE 111 mode and TE 113 mode, are simultaneously excited to realize wideband circular polarization operation. Furthermore, by removing a small DR portion from the lower corner of the main DR, the boresight gains at higher frequencies are significantly enhanced. An antenna prototype is fabricated and measured to verify the performance of the proposed design. The experimental results illustrate that the proposed antenna achieves a measured 3-dB ARBW of approximately 44.73% (3.68-5.80 GHz) in conjunction with a broad −10 dB impedance bandwidth of 69.66% (2.9-6.0 GHz). The measured boresight gain is found to be 5.49±0.85 dBic within the passband with a maximum value of 6.34 dBic at 4.7 GHz. Moreover, reasonable agreement between the simulated and measured results is achieved. INDEX TERMS Bandwidth enhancement, circular polarization, dielectric resonator antenna, higher order mode, wideband antenna.

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Section: Introductionmentioning

confidence: 99%

Single-Fed Circularly Polarized Dielectric Resonator Antenna With an Enhanced Axial Ratio Bandwidth and Enhanced Gain

et al. 2020

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“…The conformal feed consists of two probes, which excite two orthogonal components of fields with same magnitude and in time‐phase quadrature in the RDRA. So, the conformal probe excitation is an easy and effective feed method where it is required to couple field energy between DRA and feed‐line 19 . It should be relevant to note that the conformal probe feed structure should also helpful to realize CP.…”

Section: Antenna Structure and Theorymentioning

confidence: 99%

Dual‐band circularly polarized MIMO DRA for sub‐6 GHz applications

Singhwal

Kanaujia

Singh

et al. 2020

Int J RF Microw Comput Aided Eng

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In this article, a dual‐band circularly polarized multiple‐input‐multiple‐output (MIMO) dielectric resonator antenna (DRA) is proposed for 3.5 and 5.5 GHz bands, both being located under 6 GHz. Known as sub‐6 (or as mid‐band), they provide good coverage and capacity in the newly targeted fifth‐generation (5G) systems. The proposed structure consists of two ring DRAs (RDRAs) etched on a 0.8 mm thick RT Duroid substrate. Measured impedance bandwidths in broadside direction are 3.1‐3.75 GHz (19%) and 5.3‐5.6 GHz (9.4%) and circular polarization (CP) bandwidths are 3.425‐3.6 GHz (5%) and 5.45‐5.55 GHz (2%), respectively. CP is achieved by exciting HE modes using two probes placed orthogonaly to each other, that is, at an azimuthal angular distance of 90∘. Varying the lengths of the probe allows achieving the necessary time‐phase quadrature between modes. Comparison between recent multiband circularly polarized MIMO DRAs and proposed prototype has revealed that CP bandwidth in both bands is one of the highlighting advantages of the present configuration.

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“…This is mainly attributed to the fact that DRAs do not suffer from conduction losses and characterize by high radiation efficiency, when the feed is excited properly. For bringing a new horizon, an overview of basic shapes DRAs and a complete state‐of‐the‐art for mm‐wave DRAs are presented, as a comparative focus. Then, a working methodology in the form of design, simulation, and analysis of basic shaped DRAs at 60 GHz mm‐wave frequency band are reported.…”

Section: Introductionmentioning

confidence: 99%

Design and its state‐of‐the‐art of different shaped dielectric resonator antennas at millimeter‐wave frequency band

Meher

Behera

Mishra

2020

Int J RF Microw Comput Aided Eng

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This review article provides an extensive literature survey on the research progress of dielectric resonator antenna (DRA) at millimeter‐wave frequency band that includes concepts of DRAs, their empirical formulae and design methodologies for different shaped DRAs at 60 GHz frequency band. The different shaped DRAs such as cylindrical, rectangular, hexagonal, and octagonal at 60 GHz are designed, simulated and analyzed using CST microwave studio solver. The −10 dB impedance bandwidth of cylindrical, rectangular, hexagonal, and octagonal DRAs are 52.7 to 62.8 GHz, 57 to 62.2 GHz, 55.8 to 64.2 GHz, and 54.2 to 63.5 GHz, respectively. The idea behind getting broad impedance bandwidth is due to use of double‐layer substrate with different permittivity (εr1 = 4 and εr2 = 11.9). Empirical formulae are deduced for hexagonal and octagonal DRA, by studying the analogy of dielectric resonator geometry. Consequently, the mode of different shaped DRAs, that is, HEM111 and TE111 are investigated by the electric field and magnetic field distribution. With these analysis, a comprehensive research review over the period of the last two decades is carried for investigating various techniques, targeted to realized gain, circular polarization, and impedance bandwidth. Along with these analysis the state‐of‐the‐art at different shaped DRAs at mm‐wave frequency band are also reported.

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Analysis of a Wideband Circularly Polarized Cylindrical Dielectric Resonator Antenna With Broadside Radiation Coupled With Simple Microstrip Feeding

Cited by 45 publications

References 15 publications

Single-Fed Circularly Polarized Dielectric Resonator Antenna With an Enhanced Axial Ratio Bandwidth and Enhanced Gain

Single-Fed Circularly Polarized Dielectric Resonator Antenna With an Enhanced Axial Ratio Bandwidth and Enhanced Gain

Dual‐band circularly polarized MIMO DRA for sub‐6 GHz applications

Design and its state‐of‐the‐art of different shaped dielectric resonator antennas at millimeter‐wave frequency band

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