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

Trinh-Van, Son; Yang, Youngoo; Lee, Kang-Yoon; Hwang, Keum Cheol

doi:10.1109/access.2020.2976780

Cited by 20 publications

(14 citation statements)

References 20 publications

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“…Content may change prior to final publication. At the upper band, the maximum difference in the simulated and measured gain is 1.35 dB that is acceptable and can be attributed to misalignments in the measurement setup and tolerances in the fabrication and measurement [17].…”

Section: Measurement Results and Discussionmentioning

confidence: 98%

“…The other strategy relies on the shape modification of the DR [10]- [16]. Recently, the combination of singly-feeding technique and modified DRs have been reported to achieve wider 3 dB ARBWs that are comparable with dual-point fed DRAs [17]- [19]. For instance, a cut in the rectangular DR (RDR) followed by the addition of a smaller ceramic block achieved a wide 3 dB ARBW of 44.73% [17].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the combination of singly-feeding technique and modified DRs have been reported to achieve wider 3 dB ARBWs that are comparable with dual-point fed DRAs [17]- [19]. For instance, a cut in the rectangular DR (RDR) followed by the addition of a smaller ceramic block achieved a wide 3 dB ARBW of 44.73% [17]. In [18], a fan-blade-shaped CP DRA produces a dual-band response with 3 dB ARBWs of 13.33% and 7.81%.…”

Section: Introductionmentioning

confidence: 99%

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Size-Reduction of a Dual-Band Circularly Polarized Dielectric Resonator Antennas

Altaf¹,

Seo

2021

IEEE Access

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In this paper, the size reduction of a dual-band circularly polarized (CP) Y-shaped dielectric resonator antenna (YDRA) is performed. Unlike the conventional CP DRAs, the circular polarization in the YDRA is achieved by the combination of linearly varying E-fields in the two arms of unequal length. Therefore, a PEC boundary condition based technique is applied to the long arm of the dielectric resonator (DR). As a result, a 33.18% reduction in the size is achieved after the optimization of the DR for the required frequency bands. A sample of the proposed design is fabricated to perform measurements. From the results, the antenna obtains a wide impedance bandwidth for |S 11 | ≤ −10 dB of 53.5% (2.3-3.98 GHz), 3 dB axial ratios bandwidths (ARBWs) of 4.08% (2.4-2.50 GHz) and 10.91% (3.38-3.77 GHz) with respective peak gains of 4.83 dBic and 4.81 dBic. The attained 3 dB ARBWs entirely cover the WLAN 2.4 GHz and WiMAX 3.5 GHz frequency bands.INDEX TERMS Circular polarization, dielectric resonator antenna (DRA), miniaturization, PEC boundary.

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Section: Measurement Results and Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Size-Reduction of a Dual-Band Circularly Polarized Dielectric Resonator Antennas

Altaf¹,

Seo

2021

IEEE Access

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“… Antenna dimensions ( ) Imp. BW (%) AR BW (%) Peak gain ( dBic ) 15 Anisotropic DR 33.5 26.3 8.5 16 10 69.66 44.73 6.34 19 10 50.8 36 6 20 12 30.4 25.5 4.95 21 10 27.7 20 6.8 22 10 46.9 46.9 4.73 23 10 59.8 20.8 4.91 24 12.8 49.7 41 1.5 …”

Section: Measured and Simulated Resultsmentioning

confidence: 99%

Novel wideband circularly polarized DRA with squint-free radiation characteristics

Abedian

Khalily

Singh

et al. 2021

Sci Rep

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A new single-fed circularly polarized dielectric resonator antenna (CP-DRA) without beam squint is presented. The DRA comprises an S-shaped dielectric resonator (SDR) with a metalized edge and two rectangular dielectric resonators (RDRs) blocks. Horizontal extension section is applied as an extension of the SDR, and a vertical-section is placed in parallel to the metallic edge. A vertical coaxial probe is used to excite the SDR and the vertical RDR blocks through an S-shaped metal element and a small rectangular metal strip. The two added RDRs that form an L-shaped DR improve the radiation characteristics and compensate for the beam squint errors. A wideband CP performance is achieved due to the excitation of several orthogonal modes such as $$TE_{\delta 11}^x$$ T E δ 11 x , $$TE_{1\delta 1}^y$$ T E 1 δ 1 y , $$TE_{121}^z$$ T E 121 z , $$TE_{112}^y$$ T E 112 y , $$TE_{131}^x$$ T E 131 x , and $$TE_{311}^y$$ T E 311 y . The experimental results demonstrate an impedance bandwidth of approximately $$66.8\%$$ 66.8 % (3.71–7.45 GHz) and a 3-dB axial-ratio (AR) bandwidth of about $$54.8\%$$ 54.8 % (3.72–6.53 GHz) with a stable broadside beam achieving a measured peak gain of about $$4.64 \, {\text{dBic}}$$ 4.64 dBic . Furthermore, a 100% correction in beam squint value from $$\theta = 41^\circ$$ θ = 41 ∘ to $$\theta = 0^\circ$$ θ = 0 ∘ with respect to the antenna boresight is achieved.

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“…These, but also more traditional areas, need components and devices (antennas, filters, couplers, etc.) of improved performance parameters [7], [8], multi-functionality [9], [10], and smaller physical sizes [11], [12]. The keystone of practical highfrequency design is undoubtedly full-wave electromagnetic (EM) analysis, which is the only tool capable of providing reliable evaluation of electrical and field properties of circuits of growing complexity.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in High Frequency Modeling by Means of Domain Confinement and Nested Kriging

Koziel

Pietrenko‐Dabrowska

2020

IEEE Access

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Development of modern high-frequency components and circuits is heavily based on full-wave electromagnetic (EM) simulation tools. Some phenomena, although important from the point of view of the system performance, e.g., EM cross-coupling effects, feed radiation in antenna arrays, substrate anisotropy, cannot be adequately accounted for using simpler means such as equivalent network representations. Consequently, the involvement of EM analysis, especially for tuning of geometry parameters, has become imperative in high-frequency electronics. Notwithstanding, excessive computational costs associated with massive full-wave simulations required by these procedures and even more by tasks such as uncertainty quantification or multi-criterial optimization, constitute a practical bottleneck. Repetitive evaluations of a structure can be facilitated by the use of fast replacement models (surrogates). Among available methods, approximation models are by far the most popular due to their flexibility and accessibility. Unfortunately, surrogate modeling of high-frequency structures is hindered by the curse of dimensionality and nonlinearity of system responses, primarily frequency characteristics. The recently proposed performance-driven techniques attempt to address this issue by appropriate confinement of the model domain to focus the modeling process only on the relevant part of the parameter space, i.e., containing the designs that are of high quality from the point of view the assumed performance figures. The nested kriging framework is perhaps the most advanced of these methods and allows for constructing reliable surrogates over broad ranges of the system parameters and operating conditions. This paper summarizes the recent developments of the technique, including the basic formulation and several advancements aiming at the improvement of the surrogate predictive power or lowering the computational cost of training data acquisition. These include the incorporation of sensitivity data, as well as dimensionality reduction through principal component analysis. The problem of uniform data sampling in confined domains is also discussed. Our considerations are comprehensively illustrated using several examples of antennas and microwave circuits.

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

Cited by 20 publications

References 20 publications

Size-Reduction of a Dual-Band Circularly Polarized Dielectric Resonator Antennas

Size-Reduction of a Dual-Band Circularly Polarized Dielectric Resonator Antennas

Novel wideband circularly polarized DRA with squint-free radiation characteristics

Recent Advances in High Frequency Modeling by Means of Domain Confinement and Nested Kriging

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