Luneberg lens design: optimization using effective medium theories

Author

Carney, M. ; Moore, R.L.

Author_Institution

Georgia Tech. Res. Inst., Atlanta, GA, USA

fYear

1990

fDate

7-11 May 1990

Firstpage

1188

Abstract

A procedure for minimizing the weight of a Luneberg lens composed of a composite made from a low dielectric foam and a spherical pigment is presented. The spherical pigment is distributed radially to obtain the Luneberg distribution of the permittivity. The lens considered here is greater than 2 ft in diameter, and therefore minimization of weight is a priority. Effective medium theories are used with measured permittivities and densities of pigments and foams to derive a function which minimizes weight while maximizing the Luneberg electromagnetic design. A Maxwell-Garnet (1904) mixture theory is used to obtain closed-form solutions.<>

Keywords

composite materials; lenses; optical design techniques; optimisation; permittivity; 2 ft; Luneberg distribution; Luneberg lens; Maxwell-Garnet mixture theory; closed-form solutions; composite; densities; diameter; electromagnetic design; lens design; low dielectric foam; measurement; medium theories; permittivity; spherical pigment; weight minimisation; Antenna measurements; Density measurement; Design optimization; Dielectric measurements; Electromagnetic measurements; Integral equations; Lenses; Optical design; Permittivity measurement; Pigmentation;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.

Conference_Location

Dallas, TX, USA

Type

conf

DOI

10.1109/APS.1990.115324

Filename

115324