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Abdolhamid Shoory

Cette personne a quitté l’EPFL

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Publications associées (27)

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On the Measurement and Calculation of Horizontal Electric Fields From Lightning

Farhad Rachidi-Haeri, Marcos Rubinstein, Abdolhamid Shoory

In this paper, we discuss two issues related to the measurement and calculation of the horizontal electric fields from lightning. On the one hand, there is an inherent difficulty inmeasuring the horizontal electric field component from lightning because of ...

2011

Lightning Electromagnetic Fields at Very Close Distances Associated with Lightning Strikes to the Gaisberg Tower

Farhad Rachidi-Haeri, Marcos Rubinstein, Davide Pavanello, Pierre Zweiacker, Abdolhamid Shoory, Seyed Abbas Mosaddeghi

In this paper we present and discuss measurements of electric (vertical and radial) and magnetic fields from leaders and return strokes associated with lightning strikes to the 100 m tall Gaisberg tower in Austria obtained in 2007 and 2008. The fields were ...

American Geophysical Union2010

Analytical Expressions for Zero-Crossing Times in Lightning Return-Stroke Engineering Models

Farhad Rachidi-Haeri, Marcos Rubinstein, Abdolhamid Shoory

One of the characteristic features of the electromagnetic fields radiated by lightning is the far-field inversion of polarity with a zero-crossing occurring in the tens of microseconds range. This feature has been used in several studies to test the abilit ...

2009

Application of the Cascaded Transmission Line Theory of Paul and McKnight to the Evaluation of NEXT and FEXT in Twisted Wire Pair Bundles

Farhad Rachidi-Haeri, Marcos Rubinstein, Nicolas Mora Parra, Carlos Alberto Romero Romero, Abraham Rubinstein, Abdolhamid Shoory

The cascaded transmission line theory of Paul and McKnight is used in this paper to predict near-end crosstalk (NEXT) and far-end crosstalk (FEXT) in a bundle of twisted wire pairs. The approach is validated using the CST Cable Studio commercial software a ...

Ieee-Inst Electrical Electronics Engineers Inc2013

Why do some lightning return stroke models not reproduce the far-field zero crossing?

Farhad Rachidi-Haeri, Marcos Rubinstein, Abdolhamid Shoory

In this paper, we investigate the reasons why some return stroke models do not reproduce one of the characteristic features of the electromagnetic fields radiated by lightning, namely the far-field inversion of polarity with a zero crossing occurring in th ...

2009

On the Mechanism of Current Pulse Propagation Along Conical Structures: Application to Tall Towers Struck by Lightning

Farhad Rachidi-Haeri, Marcos Rubinstein, Abdolhamid Shoory, Keyhan Sheshyekani

We discuss in this paper the propagation of lightning current pulses along conical tall structures. Although the dominant mode of an infinitely long conical transmission line is transverse electric and magnetic (TEM), such a structure can also support high ...

2012

Lightning Return Strokes to Tall Towers: Ability of Engineering and Electromagnetic Models to Reproduce Nearby Electromagnetic Fields

Farhad Rachidi-Haeri, Marcos Rubinstein, Davide Pavanello, Abdolhamid Shoory, Seyed Abbas Mosaddeghi

We present measurements of nearby vertical and horizontal electric fields from leaders and return strokes associated with lightning strikes to the 100-m-tall Gaisberg Tower in Austria obtained in 2007 and 2008. The fields were measured at a distance of abo ...

Ieee-Inst Electrical Electronics Engineers Inc2012

Time-Domain Generalized Telegrapher's Equations for the Electromagnetic Field Coupling to Finite Length Wires Above a Lossy Ground

Farhad Rachidi-Haeri, Abdolhamid Shoory

In this paper, a time-domain variant of the generalized telegrapher's equations for transient electromagnetic field coupling to a finite-length wire above a lossy half-space is derived. The approach is fully based on the thin-wire antenna theory. The lossy ...

2012

Lightning electromagnetic radiation over a stratified conducting ground: Formulation and numerical evaluation of the electromagnetic fields

Farhad Rachidi-Haeri, Abdolhamid Shoory

The formulation describing the electromagnetic field radiated by a lightning return stroke over a two-layered conducting ground is presented in this paper. The derivation of the Green's functions required to solve the problem is first discussed in detail, ...

American Geophysical Union2011

Validity of Simplified Approaches for the Evaluation of Lightning Electromagnetic Fields above a Horizontally Stratified Ground

Farhad Rachidi-Haeri, Abdolhamid Shoory, Abdenabi Mimouni

We review in this paper simplified analytical expressions derived by Wait using the concept of attenuation function for the analysis of the propagation of lightning radiated electromagnetic fields over a horizontally stratified ground. Considerations regar ...

Institute of Electrical and Electronics Engineers2010

On the accuracy of approximate techniques for the evaluation of lightning electromagnetic fields along a mixed propagation path

Farhad Rachidi-Haeri, Marcos Rubinstein, Abdolhamid Shoory, Abdenabi Mimouni

In this paper we review simplified analytical expressions derived by Wait using the concept of attenuation function for the analysis of the propagation of lightning-radiated electromagnetic fields over a mixed propagation path (vertically stratified ground ...

2011

Direct use of discrete complex image method for evaluating electric field expressions in a lossy half space

Abdolhamid Shoory

A modelling technique is proposed for direct use of the discrete complex image method (DCIM) to derive closed-form expressions for electric field components encountered in the electric field integral equation (EFIE) representing a lossy half space problem. ...

2010

Relativistic Doppler effect in an extending transmission line: Application to lightning

Farhad Rachidi-Haeri, Marcos Rubinstein, Abdolhamid Shoory

We present in this paper a thorough analysis of current wave propagation with arbitrary speed along an extending transmission line. We derive rigorous analytical equations in the time and frequency domains expressing the reflections of the current wave occ ...

2011

Abdolhamid Shoory

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On the Measurement and Calculation of Horizontal Electric Fields From Lightning

Lightning Electromagnetic Fields at Very Close Distances Associated with Lightning Strikes to the Gaisberg Tower

Analytical Expressions for Zero-Crossing Times in Lightning Return-Stroke Engineering Models

Application of the Cascaded Transmission Line Theory of Paul and McKnight to the Evaluation of NEXT and FEXT in Twisted Wire Pair Bundles

Why do some lightning return stroke models not reproduce the far-field zero crossing?

On the Mechanism of Current Pulse Propagation Along Conical Structures: Application to Tall Towers Struck by Lightning

Lightning Return Strokes to Tall Towers: Ability of Engineering and Electromagnetic Models to Reproduce Nearby Electromagnetic Fields

Time-Domain Generalized Telegrapher's Equations for the Electromagnetic Field Coupling to Finite Length Wires Above a Lossy Ground

Lightning electromagnetic radiation over a stratified conducting ground: Formulation and numerical evaluation of the electromagnetic fields

Validity of Simplified Approaches for the Evaluation of Lightning Electromagnetic Fields above a Horizontally Stratified Ground

On the accuracy of approximate techniques for the evaluation of lightning electromagnetic fields along a mixed propagation path

Direct use of discrete complex image method for evaluating electric field expressions in a lossy half space

Relativistic Doppler effect in an extending transmission line: Application to lightning

On the Application of Finite-Element Method for the Analysis of Lightning Protection of Wind Turbines

Lightning Return Strokes to Tall Towers: Ability of Engineering Models to Reproduce Nearby Electromagnetic Fields

A Physical Derivation of the Horizontal Electric Field Under the Ground Associated with Lightning Return Strokes

A Discussion on the Inversion of Polarity of Lightning Far Electromagnetic Fields

On simplified approaches for the evaluation of lightning electromagnetic fields above a stratified ground

Close-Range Electric Fields Associated with Lightning Strikes to the Austrian Gaisberg Tower

The Effect of a Horizontally Stratified Ground on Lightning Electromagnetic Fields