Radiation from groove-backed antennas with a gap

Yang, Jinfu; Eom,; ', Ra

doi:10.1109/lawp.2004.834938

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…The results from the enforcement of the boundary conditions constitute a set of simultaneous equations to determine the unknown modal coefficients. Note that the specific procedure to build a set of simultaneous equations from the boundary condition is similar to those of [4]- [5], [12]. The specific derivation of the boundary conditions (7) and (8) is shown in the Appendix.…”

Section: Mode-matching Formulationmentioning

confidence: 99%

Electromagnetic Interference Caused by Parasitic Electric-line Current on a Digital Module in a Closed Cabinet

2019

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This paper conducts an electromagnetic analysis of the closed cabinet used for instrumentation and control in nuclear power plants for the case of a parasitic electric-line current that is undesirably generated onto an interior digital module. Based on the Helmholtz equation in conjunction with both the separation of variables and superposition principle, we employed a mode-matching method to obtain the analytic solution to an electromagnetic interference problem. Using modal coefficients from a set of simultaneous equations by enforcing boundary conditions, we computationally derive electromagnetic-field distributions in terms of various geometric parameters. The results provide us with information useful for estimating the level of influence of the undesired current source on the adjacent digital modules. INDEX TERMS Electric-line current, electromagnetic interference, mode-matching method.

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Section: Mode-matching Formulationmentioning

confidence: 99%

Electromagnetic Interference Caused by Parasitic Electric-line Current on a Digital Module in a Closed Cabinet

2019

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“…5 is the dominant factor when determining AF in the observation direction (ψ = ψ o ). In particular, the array factor AF in the observation direction of ψ = π/2 (in front of the aperture surface of cable tray I) can be expressed as (16). Through (16), we can establish that the magnitude of AF is maximum when the distance c between the electric-line current and the bottom plate of cable tray I in Fig.…”

Section: A Approximate Evaluation Of E-field Radiated From Cable Tray Imentioning

confidence: 99%

Analysis of Electromagnetic Interference Between Open Cable Trays

et al. 2020

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This paper presents an analytical interpretation of electromagnetic interference between solid-bottom type open cable trays in a nuclear power plant under the assumption that an electric-line current is undesirably generated from a damaged cable in an open cable tray. Based on the superposition principle and Helmholtz's equation in conjunction with the separation of variables, we employ a mode-matching method to obtain analytical solutions to the postulated electromagnetic interference problem. Before conducting a mode-matching analysis, we investigate the radiating principle of the electric field interfering with a victim cable tray by deriving the array factor in consideration of an imaginary electric-line current. In addition, we characterize the electric fields with a propagating mode at an observation point in the victim cable tray using the derived expression of the electric field. Based on this, we validate the formulation and computation of our mode-matching method and then computationally investigate the strength and distribution of interfering electric fields in terms of the separation distances provided in regulatory guidance on the electrical independence of a nuclear power plant. Finally, we compute the strength and distribution of the interfering electric field at the observation point when the location of an electric-line current is modified. The results of the study provide us with the useful information to alleviate the electromagnetic interference between open cable trays in a nuclear power plant. INDEX TERMSElectromagnetic interference, mode-matching method, open cable tray. FIGURE 2. Allowable E-field strength for RE102 test, modified allowable E-field strengths at distances of 0.025, 0.152, and 0.92 m, and susceptibility threshold level for RS103 test.

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Interpretation on Electromagnetic Interference between Open Cable Trays

Choo

Lee

2019

2019 PhotonIcs &Amp; Electromagnetics Research Symposium - Spring (PIERS-Spring)

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Radiation from groove-backed antennas with a gap

Cited by 3 publications

References 4 publications

Electromagnetic Interference Caused by Parasitic Electric-line Current on a Digital Module in a Closed Cabinet

Electromagnetic Interference Caused by Parasitic Electric-line Current on a Digital Module in a Closed Cabinet

Analysis of Electromagnetic Interference Between Open Cable Trays

Interpretation on Electromagnetic Interference between Open Cable Trays

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