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Scattering from cavity-backed apertures: The generalized dual series solution of the concentrically loaded E -pol slit cylinder problem

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2 Author(s)
Ziolkowski, R.W. ; Lawrence Livermore National Lab., Livermore, CA, USA ; Grant, J.

The generalized dual series solution to the scattering of an E -polarized ( E -pol) plane wave from an infinite circular cylinder having an infinite axial slot and enclosing an infinite concentric impedance cylinder is presented. This solution explicitly exhibits the correct edge behavior, and it can handle cylinders that are either electrically small or large without special considerations. The angle of incidence is arbitrary. A variety of current, field, and cross-section results are presented. These are compared with the corresponding H -pol problem results to establish the polarization dependencies of the aperture coupling. It is also shown that effects corresponding to the presence of the interior cavity dominate all of the scattering data. In particular, the bistatic cross sections in either case and the current induced along an interior wire in the E -pol case exhibit new resonance features that are due to the cavity-backed nature of the aperture.

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Antennas and Propagation, IEEE Transactions on  (Volume:35 ,  Issue: 5 )