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An Optimized 3D-Printed Meta-Matching Layer To Enhance Transmission Through Calcified Plaques

Ghanbarzadeh-Daghyean A, Dong E, Ghanami M, Shen C, Fang N.   +4 more
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The Tapered Impedance Half-Impulse Radiating Antenna

IEEE Transactions on Antennas and Propagation, 2021
In this article, we introduce the tapered impedance half-impulse radiating antenna (TI-HIRA). This innovative version of the HIRA allows the direct connection of COTS, $50~\Omega $ generators to the antenna, without requiring external transformers and without using the large, blocking, plates that would be required in the traditional constant ...
Felix Vega, Fernando Albarracin-Vargas, Chaouki Kasmi, Fahad Alyafei   +3 more
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Impulse Impedance and Effective Area of Grounding Grids

IEEE Transactions on Power Delivery, 2021
High values and uneven distribution of the transient ground potential rise (TGPR) at grounding grid conductors in cases of lightning can disrupt the system safety and reliability. To assess the transient performance of grounding grids under lightning currents, a parametric analysis was performed with a computer simulation of 13,978 cases of time-domain
Leonid Grcev, Blagoja Markovski
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Impulse Impedance of Grounding Grids

IEEE Transactions on Power Apparatus and Systems, 1980
A method and an empirical formula to calculate the inductance of square grounding grids fed at either centre or one of the corners is presented. Empirical formulae for the effective area and impulse coefficient for centre fed and corner fel square grids are determinel.
B.R. Gupta, B. Thapar
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Impulse Impedance of Buried Ground Wire

IEEE Transactions on Power Apparatus and Systems, 1980
The performance of ground electrode under impulse currents must be known if problems concerning lightning protection and transients under ground faults are to be accurately analysed. This paper deals with such performance and establishes a simple analytical expression to determine the impulse impedance of a buried ground wire to a short impulse ...
R. Verma, D. Mukhedkar
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Impulse impedance of rectangular grounding grids

IEEE Transactions on Power Delivery, 1992
In an earlier work B.R. Gupta and B. Thapar (1980) presented the results of investigations and empirical formulae to evaluate the impulse impedance of square grounding grids. In the present work, the authors extend those investigations to the rectangular grounding grids.
B.R. Gupta, V.K. Singh
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