Reflection Coefficient of Circular Waveguide Aperture Antenna Covered by Dielectric Radome

Radivojević, Vanja Mandrić; Rupčić, Slavko; Nesic, Natasa J.; Lisnjic, Andjelko

doi:10.1109/sst49455.2020.9264090

Cited by 1 publication

(6 citation statements)

References 2 publications

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“…Similar research was carried out by the authors in [11], but it involved an aperture antenna fed by a waveguide with a circular cross-section mounted on a grounded plane. Moreover, the opening of the antenna is covered with a dielectric plate, and the research results showed that by changing only two parameters of the dielectric, it is possible to influence the reduction in the reflection coefficient of the antenna in question.…”

Section: Introductionmentioning

confidence: 86%

“…The permittivity ε is generally a complex number that describes the interaction of a material with an electric field [13,16]. Low values of the relative permittivity are values that characterize insulators [11,12].…”

Section: Permittivity and Electrical Conductivity Of The Dielectric P...mentioning

confidence: 99%

“…The thickness d ranges from d = 0 mm to d = 13 mm, assuming all other parameters: ε r = 2.5, µ r = 1, σ = 0 S/m, tg δ = 0.09, tg δ µ = 0. Some values of these parameters were carefully selected according to [11,17,18].…”

Section: Influence Of Dielectric Plate Thickness D On the Reflection ...mentioning

confidence: 99%

“…Therefore, in all other simulation calculations, electrical conductivity is set to 0 S/m. By comparing the relative dielectric and conductive component of the imaginary part of the complex permittivity, the importance of each of them can be determined from Equation (11). Let us consider the case in which the minimization of the reflection coefficient is achieved.…”

Section: The Influence Of Thementioning

confidence: 99%

“…This article is a continuation of the research aimed at improving impedance matching of the aperture antenna and a detailed analysis of the structural and electromagnetic parameters of the dielectric plate placed on the antenna, [10][11][12]. References [10][11][12] analyze the influence of only two parameters (thickness and permittivity) of the dielectric on the admittance or reflection coefficient, whereas this article analyzes the influence of all parameters of the dielectric plate (thickness of the material d in mm, density of the dielectric ρ in kg•m −3 , relative permittivity ε r , conductivity of the dielectric σ in S/m, losses in the dielectric tan δ and tan δ µ , and relative permeability of the material µ r ), and finally, simulation is validated with measured values. The aim of the article is to achieve the lowest possible reflection coefficient of the circular aperture antenna in order to accomplish the best impedance matching of the antenna itself.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Dielectric Plate Parameters on the Reflection Coefficient of a Planar Aperture Antenna

et al. 2023

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In this article, an aperture antenna excited by a waveguide with a circular cross-section and covered with a dielectric plate was analyzed via simulation calculation and verified via measurements. The influence of the geometrical and electromagnetic parameters of the dielectric plate on the reflection coefficient S11 of the antenna opening was systematically analyzed. The geometrical parameters taken in this analysis are the thickness d and the width/length h1/h2 of the dielectric plate. The electromagnetic parameters used in this analysis are the real and the imaginary part of permittivity (εr, tan δ) and the electrical conductivity of the dielectric plate (σ). The simulation calculation and analysis included other structural and electromagnetic parameters of the dielectric plate (density of the radome material, relative permeability, and magnetic loss tangent (ρ, µr, and tan δµ, respectively)), but the results show that in the range of real values of these parameters for the materials used for the dielectric plate, they had no significant influence on the reflection coefficient. The results show that impedance-matched antennas with very low values of the reflection coefficients S11 at the resonant frequency can be realized by changing the geometrical and electromagnetic parameters of the dielectric plate material. The results are presented for a circular aperture antenna on a planar grounded plane with a dielectric plate on the opening, and the achieved lowest values of the S11 parameter were −45.17 dB (simulated) and −43.93 dB (measured) at the frequencies of 1.7820 GHz and 1.7550 GHz, respectively. The estimated values of the dielectric plate parameters in this case are thickness d = 11.08 mm (0.67 λ); width x length of grounded plane and dielectric plate h1 x h2 = 423 × 450 mm2 (2.51 × 2.67 λ); relative permittivity 2.5, tan δ = 0.09, μr = 1, tan δμ = 0.00, ρ = 1200 kg·m−3; and electrical conductivity σ = 0 S/m. The simulation calculation results were verified by measuring the reflection coefficient S11 on the created laboratory model of the aperture antenna with the dielectric plate and showed a very good match.

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Section: Introductionmentioning

confidence: 86%

Section: Permittivity and Electrical Conductivity Of The Dielectric P...mentioning

confidence: 99%

Section: Influence Of Dielectric Plate Thickness D On the Reflection ...mentioning

confidence: 99%

Section: The Influence Of Thementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of Dielectric Plate Parameters on the Reflection Coefficient of a Planar Aperture Antenna

et al. 2023

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Reflection Coefficient of Circular Waveguide Aperture Antenna Covered by Dielectric Radome

Cited by 1 publication

References 2 publications

Influence of Dielectric Plate Parameters on the Reflection Coefficient of a Planar Aperture Antenna

Influence of Dielectric Plate Parameters on the Reflection Coefficient of a Planar Aperture Antenna

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