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International Journal of Antennas and Propagation
Volume 2011, Article ID 708987, 7 pages
http://dx.doi.org/10.1155/2011/708987
Research Article

Partially Transparent Jaumann-Like Absorber Applied to a Curved Structure

Electromagnetic Engineering Laboratory, School of Electrical Engineering, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden

Received 12 April 2011; Accepted 30 June 2011

Academic Editor: Dau-Chyrh Chang

Copyright © 2011 Alireza Motevasselian and B. L. G. Jonsson. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A Jaumann absorber with its metal backing replaced with a combined low-pass and polarizer FSS is investigated with respect to its absorption and its polarization-dependent low-frequency transparency properties. This structure is applied to an idealized curved wing-front end, and its monostatic radar cross-section is determined. The FSS-Jaumann structure preserves an absorption similar to the planar Jaumann absorber in the higher frequency interval and enables a partial transparency in the TEz polarization at 1 GHz. In addition, once the structure is applied to the wing-front end, a significant reduction in two-dimensional radar cross-section for both the TMz and TEz polarization over 2–16 GHz is observed. A sensitivity analysis shows that the resistivity of the inner resistive layer has a large impact on the 1 GHz transmission.