Spiral antenna array configurations on spherical surface

Rupčić, Slavko; Mandrić, Vanja

doi:10.1109/icecom.2013.6684764

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…Simulation calculation and analysis However, a systematic analysis of the known dielectric parameters (geometric and electromagnetic) and their influence on the reflection coefficient and, thus, on impedance matching, as well as the choice of the frequency range of the antenna itself, was carried out as a part of this study. The present article is intended as a detailed extension of previous studies on the influence of just two parameters (thickness and permittivity) on impedance matching or the reflection coefficient [10,12]. This article analyzes the influence of all parameters of the dielectric plate.…”

Section: Discussionmentioning

confidence: 99%

“…The authors in [10] analyze the input admittance of a circular aperture antenna fed by a waveguide of a circular cross-section mounted on a spherical grounded surface. The analytical approach is based on the moment method in the spectral domain in the Fortran programming language.…”

Section: Introductionmentioning

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: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%