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Dispersive FDTD modeling on multi-layer left-handed meta-materials for near/far field imaging at microwave frequencies

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3 Author(s)
Hao, Y. ; Dept. of Electron. Eng., London Univ., UK ; Lu, L. ; Parini, C.G.

'Perfect' imaging in left-handed meta-materials (LHMs) is constrained by evanescent wave losses. A multi-layer LHM structure can be deployed to reduce the losses, particularly in near field imaging. In this paper, we demonstrate using dispersive FDTD simulation how the multiple-layer LHM structure is used to 'guide' evanescent waves with very little attenuation over large stack thickness in near field imaging at microwave frequencies. Effect of the multi-layer structure on far field imaging is also presented. The theoretical prediction is verified by FDTD simulation with good agreement.

Published in:

Antennas and Propagation Society International Symposium, 2003. IEEE  (Volume:4 )

Date of Conference:

22-27 June 2003