Title

Sources of and Remedies for Removing Unwanted Reflections in Millimeter Wave Images of Complex Sofi-covered Space Shuttle Structures

Abstract

In the recent years, continuous-wave near-field and lens-focused millimeter wave imaging systems have been effectively used to demonstrate their utility for producing high-resolution images of metallic structures covered with spay on foam insulation (SOFI) such as the Space Shuttle external fuel tank. However, for some specifc structures a certain interference pattern may be superimposed on the produced images. There are methods by which the influence of this unwanted interference can be reduced, such as the incorporation of an incidence angle and the proper use of signal polarization. This paper presents the basics of this problem and describes the use of the methods for reducing this unwanted influence through specific examples.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Millimetre Waves; Nondestructive Testing; Reflectometers; Space Vehicles; Composite Testing and Evaluation; Microwave and Millimeter Wave Imaging

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2008 American Institute of Physics (AIP), All rights reserved.


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