Transient Responses of Coaxial Cables in an Electrically Large Cabin With Slots and Windows Illuminated by an Electromagnetic Pulse

Wang, Jian; Wang, Yin; Fang, Jinpeng; Liu, Qifeng

doi:10.2528/pier10060708

Cited by 15 publications

(12 citation statements)

References 22 publications

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“…The operational cabins of modern naval vessels contain several parts made of composites and glass, thus apart from cables routed in open spaces (which are strongly illuminated by the radiation fields of nearby lightning), the cables in these cabins can also be subjected to significant induced voltages [54]. The impact of induced voltages may be quite severe in such cases as the potential victims (electronics that aid navigation and various other operations) are in close proximity.…”

Section: Discussionmentioning

confidence: 99%

Protection of Naval Systems Against Electromagnetic Effects Due to Lightning

Gomes¹,

Kadir²

2011

PIER

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Abstract-This study investigates possible lightning threats to naval crafts, especially those sailing in the shallow waters of tropical oceans where thunderstorms prevail throughout the year and Far-East Asian region where dangerous positive lightning is a significant characteristic in winter thunderstorms. It is empathized that sea water acts as nearly a perfect conductor thus lightning electromagnetic transients propagate over the sea with almost zero attenuation of amplitude and high frequency components intact. The ratio between the peak electric fields at 5 km from the lightning channel, after fields propagate over dry soil and over sea water is 0.75. The ratio between the peak electric field derivatives under the same conditions is 0.1. Such small ratios are observed in the magnetic fields and their time derivatives as well. Apart from the conductivity, the topological irregularities of the plane over which propagation takes place also contribute to further attenuation of fields and their time derivatives. This makes marine naval systems more vulnerable to lightning induced effects than their ground-based counterparts. The paper discusses in detail the lapses of existing naval standards in the defense of electrical and electronic systems against both direct lightning currents and induced effects of nearby lightning. Consequently we propose the development of a dedicated standard for the lightning protection of naval systems, with the inclusion of several significant recommendations specified in this paper.

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Section: Discussionmentioning

confidence: 99%

Protection of Naval Systems Against Electromagnetic Effects Due to Lightning

Gomes¹,

Kadir²

2011

PIER

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“…The modified FDTD methods in [10] and [11] were all verified accurately and efficiently, but they did not take external fields into account. Furthermore, [12,13], and [14] tried to give some co-simulation methods considering fields, transmission lines, and circuit modules simultaneously. Unfortunately, most of them focused on simple cases such as linear circuit loads and illumination of plane wave.…”

Section: Introductionmentioning

confidence: 99%

“…In the past years, there are a lot of researches focusing on the EMC effects of various electronic information systems [7][8][9][10][11][12][13][14][15][16][17], including prediction methods, design, protections, etc. In [7], Baum firstly decomposed an entire complex electronic information system into a few small areas by using the concept of electromagnetic topology, and then the whole simulation was carried out in independent parts.…”

Section: Introductionmentioning

confidence: 99%

A Novel Field-Line-Circuit Hybrid Algorithm for Transient Responses Prediction of Transmission Lines Based on FDTD Method

Han¹,

Wang²,

Xia³

2017

PIER M

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Abstract-A novel field-line-circuit hybrid algorithm based on finite difference time domain (FDTD) method is devoted to predicting the electromagnetic responses of transmission line with multi-ports network in a shelter in this paper. The full wave FDTD method, transmission line FDTD method, and the modified nodal analysis (MNA) are combined to be compatible with the multi-level electromagnetic (EM) coupling progress of the electromagnetic interference (EMI) problem. The proposed method divides the EM couplings among the spatial EM fields, antennas, transmission line networks, and terminal circuits in some typical electronic systems into different levels with appreciate simulation techniques used. The accuracy of the hybrid method is verified by comparing the terminal transient voltage responses of transmission lines with the results obtained by PSPICE, and good agreements are achieved. Numerical calculations are further performed to show the terminal coupling voltages and currents, and the effects of incident directions and polarizations of the illuminated electromagnetic pulse (EMP) are both taken into account.

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“…In their practical applications, one door and some windows have to be introduced on the cabin wall, which provide directive coupling paths for an IEMP, resulting in serious degradation in their protecting or shielding effectiveness. Therefore, in the past two decades, some theoretical and experimental studies have been carried out for the design of metallic rectangular cabins with high protecting effectiveness, together with their inner field prediction using the method of moments (MoM) as well as finite-difference time-domain (FDTD) method [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

A Novel Dielectric Conformal FDTD Method for Computing Sar Distribution of the Human Body in a Metallic Cabin Illuminated by an Intentional Electromagnetic Pulse (Iemp)

Kong¹,

Wang

Wang³

2012

PIER

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Abstract-One novel dielectric conformal finite-difference timedomain (FDTD) method is used for computing specific absorption rate (SAR) distribution over the human body model in one metallic cabin with some windows on its wall. It is based on the concept of area average, which is different from other traditional conformal FDTD schemes. Our developed algorithm is verified by calculating both point and average SARs of dielectric sphere and human head models illuminated by an intentional electromagnetic pulse (IEMP), respectively, and CST Microwave Studio (MWS) also used for validating its accuracy. Numerical calculations are further performed to show the average SAR distribution over the human body model for different IEMP incidences, where the cabin door is opened or closed. The effects of E-field amplitude, direction and polarization of the incident IEMP on the SAR distributions are characterized in detail. This study will be useful for further electromagnetic protection for some persons working in high power exposure environment.

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Transient Responses of Coaxial Cables in an Electrically Large Cabin With Slots and Windows Illuminated by an Electromagnetic Pulse

Cited by 15 publications

References 22 publications

Protection of Naval Systems Against Electromagnetic Effects Due to Lightning

Protection of Naval Systems Against Electromagnetic Effects Due to Lightning

A Novel Field-Line-Circuit Hybrid Algorithm for Transient Responses Prediction of Transmission Lines Based on FDTD Method

A Novel Dielectric Conformal FDTD Method for Computing Sar Distribution of the Human Body in a Metallic Cabin Illuminated by an Intentional Electromagnetic Pulse (Iemp)

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