NDLI: Time-Domain Modeling of Electromagnetic Pulses Returned from Targets in Dispersive and Dissipative Media

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Time-Domain Modeling of Electromagnetic Pulses Returned from Targets in Dispersive and Dissipative Media

Content Provider	Springer Nature Link
Author	Gaunaurd, G. C. Strifors, H. C. Sullivan, A.
Copyright Year	2008
Abstract	Using a Method-of-Moments (MoM) code, we earlier simulated ultra-wideband (UWB) returned echoes from two targets, one penetrable and one impenetrable, buried in a soil with known electric properties. The simple shape of mines, coupled with their predictable deployment in the ground, has also provided a fundamental understanding of the underlying backscatter phenomenology. In particular, the backscattered waveform from a mine can be decomposed into a collection of closely spaced copies of an elemental wave object with different amplitudes and time delays. This wave object is here defined as the derivative of the waveform incident on the target. The spacing of the copies or replicas of the wave object could be determined by the round trip time delay between scattering centers. This methodology was previously applied to impenetrable targets and is now applied also to a penetrable target. The previously computed returns from each target for a given incident pulse are modeled by a few copies of the elemental wave object with the time delay and amplitude of each copy taken as unknown parameters. These parameters are then determined by minimizing in the least square sense the difference between the MoM computed signal and the model signal using the differential evolution method (DEM). The methodology is extended by way of our previously developed target translated method (TTM) to approximate the computation of the backscattered model signal when the target is buried at a different depth in the soil with a different moisture content.
Starting Page	9
Ending Page	25
Page Count	17
File Format	PDF
ISSN	15572064
Journal	Sensing and Imaging: An International Journal
Volume Number	9
Issue Number	1-2
e-ISSN	15739317
Language	English
Publisher	Springer US
Publisher Date	2008-08-26
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	UWB radar Ground-penetrating radar Method of moments Differential evolution method Mine detection Lossy media Imaging Radiology Microwaves, RF and Optical Engineering Electronic and Computer Engineering
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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