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Electromagnetic scattering by layered cylinders --- low frequency reduction of RCS

In English

Författare

Summary, in English

In this paper we present two different ways of reducing the radar cross section (RCS) of thin metallic wires at low frequencies. This reduction is achieved by adding a dielectric coating on the wire. The entire cylindrical structure is finally protected by a thin exterior non-magnetic dielectric layer (eagle skin).

The contribution to the RCS has either an electric or an magnetic origin. To reduce the RCS it is possible to chose material parameters so that both the electric and the magnetic contributions vanish. This leads, however, to non-physical material parameter values. The underlying principle in the second method is to chose material parameters in the dielectric coating such that the electric and magnetic contributions annihilate each other. Fortunately, this annihilation can be obtained with physically realistic material parameters.

Explicit numerical examples illustrate both ideas.

Publiceringsår

2015

Språk

Engelska

Publikation/Tidskrift/Serie

Technical Report LUTEDX/(TEAT-7237)/1-11/(2015)

Dokumenttyp

Rapport

Förlag

The Department of Electrical and Information Technology

Ämne

  • Electrical Engineering, Electronic Engineering, Information Engineering

Status

Published

Report number

TEAT-7237

Forskningsgrupp

  • Electromagnetic theory