Numerical calculation of shielding effectiveness of enclosure with apertures based on EM field coupling with wire structures

Cvetkovic, Tatjana; Milutinović, Vesna; Dončov, Nebojša; Milovanović, Bratislav

doi:10.2298/fuee1504585c

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…In modern microwave and millimeter wave communication systems, the use of quadrifilar helical antenna is increasing day by day. This is due to the very large beam-width and high gain provided by the antenna [1][2][3][4]. It has become a major pillar for antenna design of satellite communication.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of Quadrifilar helical antenna for Cube-Sats using C-band frequency range for satellite communication

et al. 2019

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Design and analysis of Quadrifilar helical antenna are presented in this paper. The proposed antenna is designed for Cube-Sats in the low earth and medium earth orbits. It is a combination of four helical antennas, each separated by 90°, and excited separately at the feeding point. The antenna is designed for operation at 4.5 GHz with an impedance bandwidth of 11.11 %. Design of the antenna is done in two steps. The first step being the design of a ground plane, which can make the antenna operate at 4.5 GHz. The second step is to analyze the antenna's performance for different helix angles using the best ground plane dimensions obtained in the first step. The gain versus frequency curve has been obtained and the designed antenna is having a gain of more than 4 dB at the resonant frequency of 4.5 GHz.

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Section: Introductionmentioning

confidence: 99%

Design and analysis of Quadrifilar helical antenna for Cube-Sats using C-band frequency range for satellite communication

et al. 2019

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“…There are various numerical studies about shielding effectiveness such as Finite Element Methods (FEM) [2], Finite Difference Time Domain (FDTD) [3][4][5][6], Transmission Line Matrix (TLM) [7][8][9], and Moment of Method (MoM) [10][11][12][13][14][15][16] and etc. In these numerical methods, it is possible to meet the differences in the solutions for special regions which depend on in spatial, frequency solution, computation time and precise simulation.…”

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confidence: 99%

International Journal of Electronics and Telecommunications

Başyiğit

Doğan

2019

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This paper presents that the effect of single aperture size of metallic enclosure on electrical shielding effectiveness (ESE) at 0 -1 GHz frequency range has been investigated by using both Robinson's analytical formulation and artificial neural networks (ANN) methods that are multilayer perceptron (MLP) networks and a radial basis function neural network (RBFNN). All results including measurement have been compared each other in terms of aperture geometry of metallic enclosure. The geometry of single aperture varies from square to rectangular shape while the open area of aperture is fixed. It has been observed that network structure of MLP 3-40-1 in modeling with ANN modeled with fewer neurons in the sense of overlapping of faults and data and modeled accordingly. In contrast, the RBFNN 3-150-1 is the other detection that the network structure is modeled with more neurons and more. It can be seen from the same network-structured MLP and RBFNN that the MLP modeled better. In this paper, the impact of dimension of rectangular aperture on shielding performance by using RBFNN and MLP network model with ANN has been studied, as a novelty. Keywords-electromagneticshielding, electromagnetic compatibility, apertures, multilayer perceptron, radial basis function networks I. INTRODUCTIONLECTROMAGNETIC interference has emerged as a major problem with the complexity of electronic circuits. Especially, sensitive electronic equipment may be damaged by this interference. Shielding is one of the major effective methods to reduce the levels of emissions and improve the immunity of electronic equipment. Shielded enclosures and enclosure components usually have apertures for maintenance, cooling and ventilation that they have different pattern and size for control panels, heat dissipation, cables, and other purposes. These apertures decrease the shielding performance and the integrity of the shielded enclosures due to the electromagnetic energy leakage. Also the dielectric mediums have

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Shielding Effectiveness Estimation by using Monopole-receiving Antenna and Comparison with Dipole Antenna

Nesic¹,

Doncov

2016

Frequenz

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In this paper, a numerical analysis of shielding properties of a protective metal enclosure has been performed by simulating a receiving antenna placed inside. Here, the main focus is put on the monopole antenna type. This antenna type is used in an experimental set-up to measure the shielding effectiveness (SE) of the enclosure as often as some other antennas such as dipole. Numerical model, based on the Transmission-Line Matrix (TLM) method, is applied to numerically investigate an impact this antenna might have on a detected level of electromagnetic (EM) field when it is used in the SE measurements. As in experiments, the estimation of SE of an enclosure in the numerical model is performed based on the current induced on the antenna, directly provided by a compact TLM wire model. The model accuracy is verified through a comparison with the experimental results from the literature. The analysis includes the monopole antenna with different radii and lengths, in order to consider changes in the resonant frequencies and the SE level of enclosure. Finally, the enclosure with either the monopole or the dipole is simulated in order to compare their influence on EM field distribution inside the enclosure.

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Numerical calculation of shielding effectiveness of enclosure with apertures based on EM field coupling with wire structures

Cited by 3 publications

References 13 publications

Design and analysis of Quadrifilar helical antenna for Cube-Sats using C-band frequency range for satellite communication

Design and analysis of Quadrifilar helical antenna for Cube-Sats using C-band frequency range for satellite communication

International Journal of Electronics and Telecommunications

Shielding Effectiveness Estimation by using Monopole-receiving Antenna and Comparison with Dipole Antenna

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