Journal ArticleDOI
Focal waveform of a prolate‐spheroidal impulse‐radiating antenna
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In this paper, the authors developed some analytical approximations for the transient focal waveform produced at the second focus of a prolate-spheroidal reflector due to a pulse TEM wave launched from the first focus.Abstract:
[1] This paper develops some analytical approximations for the transient focal waveform produced at the second focus of a prolate-spheroidal reflector due to a pulse TEM wave launched from the first focus. This is extended to consider the spot size of the peak field near the second focus.read more
Citations
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Journal ArticleDOI
The Effect of Intense Subnanosecond Electrical Pulses on Biological Cells
Karl H. Schoenbach,Shu Xiao,Ravindra P. Joshi,J.T. Camp,T. Heeren,Juergen F. Kolb,Stephen J. Beebe +6 more
TL;DR: In this article, the biological effect of intense sub-nanosecond pulses was explored by using a generator that provides voltage pulses of 160 kV amplitude, 200 ps rise time, and 800 ps pulse width.
Proceedings Article
The Effect of Intense Subnanosecond Electrical Pulses on Biological Cells
Karl H. Schoenbach,Shu Xiao,Ravindra P. Joshi,J.T. Camp,T. Heeren,Juergen F. Kolb,Stephen J. Beebe +6 more
TL;DR: In this article, the authors have developed a generator that provides voltage pulses of 160 kV amplitude, 200 ps rise time, and 800 ps pulse width, which are delivered to a cylindrical Teflon chamber with polished flat electrodes at either end.
Journal ArticleDOI
Subnanosecond Electric Pulses Cause Membrane Permeabilization and Cell Death
TL;DR: Studies on the cellular level show increased transport across the membrane at much lower exposure times or number of pulses, while exposed to 2000 pulses, NG108 cells exhibit an increase in membrane conductance, but only allow transmembrane currents to flow, if the medium is positively biased with respect to the cell interior.
Journal ArticleDOI
A Reflector Antenna for Focusing Subnanosecond Pulses in the Near Field
TL;DR: In this paper, a prolate-spheroidal reflector antenna focusing sub-nanosecond pulsed electromagnetic radiation in the near field is studied, and the antenna reflector is fed by a pair of balanced, conical-plate transmission lines and the radiated pulse consists of a prepulse, an impulse, and a postpulse.
Journal ArticleDOI
A Hyperband Antenna to Launch and Focus Fast High-Voltage Pulses Onto Biological Targets
Prashanth Kumar,Carl E. Baum,S. Altunc,Jerald Buchenauer,Shu Xiao,Christos G. Christodoulou,Edl Schamiloglu,Karl H. Schoenbach +7 more
TL;DR: In this paper, the design of a prolate-spheroidal impulse-radiating hyperband antenna system to launch and focus fast (100 ps) high-voltage ( >; 100 kV) pulses onto biological targets is reviewed.
References
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Journal ArticleDOI
Zap [extreme voltage for fighting diseases]
TL;DR: Bioelectrics is an emerging field of research that combines the disciplines of high voltage engineering and cell biology to gain a better understanding of the effects of powerful, ultrashort voltage pulses on living tissue as discussed by the authors.
Proceedings ArticleDOI
Aperture efficiencies for IRAs
TL;DR: In this paper, the authors evaluated the aperture efficiencies of a conical TEM (transverse electromagnetic) feed for a paraboloidal reflector (or a lens if desired) and showed that the feed arms are terminated (primarily resistive) at the reflector to minimize multiple reflections and to improve the limited low-frequency performance by balancing the electric and magnetic dipole moments.
Proceedings ArticleDOI
Timed arrays for radiating impulse-like transient fields
TL;DR: In this article, the authors reviewed and discussed various designs of unit cells for single and dual polarization for the low-frequency part of the pulse spectrum, governed by the electric and magnetic dipole moments dipoles of the array and additional conductors (impedance loaded) connected to the array.
Book ChapterDOI
Producing Large Transient Electromagnetic Fields in a Small Region: An Electromagnetic Implosion
TL;DR: In this paper, the authors proposed to use a target which is relatively close to the antenna so that focusing at infinity may not be appropriate, which can then be used to increase the field strengths there.