Microwave Scattering Characteristics of Defective Dielectric Cylinders


Microwave scattering properties (radar cross-section, RCS) of inhomogeneous dielectric (composite) cylinders with finite lengths and radii are used to determine the presence of defects of various shapes, sizes and dielectric properties. These cylinders are assumed to be irradiated by a uniform plane wave with arbitrary linear polarization and incidence angle. The induced and scattered fields are numerically obtained using the method of moments. This technique is used to optimize defect detection parameters such as frequency of operation, polarization and incidence angles. The results show the potential of detecting very small voids embedded in various cylinders. The role of frequency as a detection sensitivity enhancer is also demonstrated. The angle of incidence proves to be an important parameter for increased detection sensitivity. Defect size determination is also shown to be possible. This technique shows promise as a test bed for examining the properties of dielectric (composite) cylinders.


Electrical and Computer Engineering

Keywords and Phrases

Composite Materials; Cylinders (Shapes); Defects; Dielectric Materials; Dielectric Properties; Electromagnetic Wave Polarization; Electromagnetic Wave Scattering; Numerical Methods; Radar Cross Section; Size Determination; Incidence Angle; Method Of Moments; Voids; Nondestructive Examination; Composites; Dielectric Cylinders; Microwaves

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Document Type

Article - Journal

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© 1994 Elsevier, All rights reserved.

Publication Date

01 Dec 1994