Antenna radiation in the presence of a chiral sphere
作者:
Nader Engheta,
Marek W. Kowarz,
期刊:
Journal of Applied Physics
(AIP Available online 1990)
卷期:
Volume 67,
issue 2
页码: 639-647
ISSN:0021-8979
年代: 1990
DOI:10.1063/1.345766
出版商: AIP
数据来源: AIP
摘要:
The radiation emitted by electromagnetic sources placed both inside and outside of a homogeneous sphere of chiral media is studied using an exact formulation. For both cases, dyadic Green’s functions are found in terms of spherical vector wave functions. The radiated fields and radiation resistance are examined for a dipole located at the center of the chiral sphere. For this case, it is shown that by choosing the sphere’s size and material parameters properly, purely circular polarization can be achieved in the far field. It is also demonstrated that the radiation resistance of the dipole can be increased.
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