Detection of a Dielectric Target in a Half-space Using Extinction-pulse (E-pulse) Technique

Padhi, Shantanu, Lui, Hoi-Shun, Shuley, Nicholas and Liu, Feng (2008). Detection of a Dielectric Target in a Half-space Using Extinction-pulse (E-pulse) Technique. In: Progress In Electromagnetics Research Symposium Abstracts. Progress In Electromagnetics Research Symposium (PIERS) 2008, Hangzhou, China, (722-722). 24-28 March 2008.

Author Padhi, Shantanu
Lui, Hoi-Shun
Shuley, Nicholas
Liu, Feng
Title of paper Detection of a Dielectric Target in a Half-space Using Extinction-pulse (E-pulse) Technique
Conference name Progress In Electromagnetics Research Symposium (PIERS) 2008
Conference location Hangzhou, China
Conference dates 24-28 March 2008
Proceedings title Progress In Electromagnetics Research Symposium Abstracts
Publication Year 2008
Sub-type Oral presentation
Start page 722
End page 722
Total pages 1
Language eng
Abstract/Summary This paper describes an approach to model the impulse response of a dielectric target buried inside a half-space using a time domain deconvolution technique. The Singularity Expansion Method (SEM) has been used for a long time in the detection and recognition of targets in free space. In this approach, the scattered signals are represented as a sum of exponentials and can be extracted by using a deconvolution process if the incident signal is known. A ¯nite di®erence time domain (FDTD) code is used to calculate the transient responses of a dielectric scatterer in a half-space. A singular value decomposition algorithm is used to estimate the impulse response of the target by removing the response from interface and a robust algorithm such as the matrix pencil method (MPOF) is used to calculate the complex natural resonances (CNRs) of the scatterer. The extracted poles are compared with the poles scattered by the target in free space. An automated E-pulse scheme has been used to discriminate the change in physical properties of target. The discrimination performance is calculated quantitatively by using an energy discrimination number (EDN) and the discrimination ratio (DR). The calculated results successfully discriminate the targets with small changes in conductivity. This approach has wide scale application in ¯nding the signatures of dielectric target buried in half space. This result may be useful in determining the existence of a subcutaneous tumor in a biomedical application.
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ

 
Versions
Version Filter Type
Citation counts: Google Scholar Search Google Scholar
Created: Tue, 07 May 2013, 14:19:21 EST by Antony Lui on behalf of School of Information Technol and Elec Engineering