Conference Proceeding

Enhancement of the Focusing Properties of a Passive Radiometry Imaging System: A Theoretical Electromagnetic Study

Nat. Tech. Univ. of Athens, Athens
10/2007; DOI:10.1109/ICEAA.2007.4387480 pp.1018 - 1021 In proceeding of: Electromagnetics in Advanced Applications, 2007. ICEAA 2007. International Conference on
Source: IEEE Xplore

ABSTRACT A non-invasive imaging system, consisting of an ellipsoidal conductive cavity and radiometric receivers, designed and constructed in our laboratory the past few years is restudied. A means for further improvement of the ellipsoidal reflector's focusing properties thus its performance is herein investigated. The main differentiating factor of our new approach is that the receiving antenna is more realistically modelled and also covered by two layers of different dielectric properties. The present paper provides details on the electromagnetic theoretical analysis of the problem and presents numerical results for the electric field distribution inside the head model, using two main operating frequencies, namely 0.5GHz and 1.5GHz for four distinct cases. The focusing optimization of the system in terms of spatial accuracy and penetration depth is assessed while the method and results are also separately validated.

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Keywords

details
 
different dielectric properties
 
distinct cases
 
electric field distribution
 
electromagnetic theoretical analysis
 
ellipsoidal conductive cavity
 
main
 
non-invasive imaging system
 
present paper
 
presents numerical results
 
spatial accuracy
 

M.I. Giamalaki