Title :
An electromagnetic comparison of the tapered spherical helix and the negative permittivity sphere
Author :
Stuart, Howard R.
Author_Institution :
Bell Labs Innovations, Whippany
Abstract :
In this paper, the tapered spherical helix is analyzed in detail, and it is shown that the electric field of its resonant mode closely follows that of a sphere composed of material obeying the Drude dispersion relationship. An analytical formula is derived relating the inductance of the spherical helix to the plasma frequency of the spherical material mimicked by the helix.
Keywords :
helical antennas; permittivity; electromagnetic comparison; negative permittivity sphere; plasma frequency; tapered spherical helix; Boundary conditions; Frequency; Geometry; Helical antennas; Inductance; Numerical simulation; Permittivity; Poles and zeros; Resonance; Wire;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2007 IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-0877-1
Electronic_ISBN :
978-1-4244-0878-8
DOI :
10.1109/APS.2007.4396285
