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Measuring edge scattering from finite-sized samples using a Gaussian beam

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2 Author(s)
Petersson, L.E.R. ; Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA ; Smith, G.S.

In this paper, we examine the possibility of measuring edge scattering from a material by using a Gaussian beam together with a finite-sized sample of the material. A practical implementation for measuring edge scattering is shown. Here a focused beam system, consisting of a horn antenna and a lens, produces a beam that closely resembles a Gaussian beam. The waist of the beam is centered on one edge of a finite-sized object. The object is often a thin, flat rectangular plate of some material that is being investigated for the purpose of minimizing edge scattering. The scattered field is measured, either close to or far from the object, to determine the characteristics of the edge scattering. With this system, various treatments can be applied to the edge while observing the change in the scattering. In this paper, we analyze a canonical problem. Results from this analysis are used to obtain guidelines for the conditions under which the scattering from the illuminated edge can be isolated from the scattering from the remainder of the object, viz, from the other edges of the plate.

Published in:

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

Date of Conference:

22-27 June 2003

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