Elimination of background clutter in airports for instrument landing systems

K. A. Jose; Vijay K. Varadan; Vasundara V. Varadan

doi:10.1117/12.174054

1 May 1994 Elimination of background clutter in airports for instrument landing systems

K. A. Jose, Vijay K. Varadan, Vasundara V. Varadan

Proceedings Volume 2189, Smart Structures and Materials 1994: Smart Materials; (1994) https://doi.org/10.1117/12.174054
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

Specular reflection from airport buildings interferes with instrument landing systems. It is possible to eliminate these specular reflections by periodic strip grating techniques. These metallic strips, when painted over a dielectric sheet, are found to eliminate the specular reflections from a plane metallic surface and the surface behaves as a `non reflecting conducting surface.' These inexpensive surfaces are lightweight and have the added advantage of ease in fabrication. It is easy to apply metallic paint in a regularly spaced strip pattern. By a suitable choice of the period `d' and the thickness of the dielectric medium (the wall), it is possible to eliminate reflections at any desired angle. It may also be possible to eliminate the reflections from other targets like cylinders and corner reflectors.

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K. A. Jose, Vijay K. Varadan, and Vasundara V. Varadan "Elimination of background clutter in airports for instrument landing systems", Proc. SPIE 2189, Smart Structures and Materials 1994: Smart Materials, (1 May 1994); https://doi.org/10.1117/12.174054

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KEYWORDS

Specular reflections

Dielectrics

Reflection

Dielectric polarization

Antennas

Buildings

Reflectors

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