Title :
A Closed-Form Solution for ELF Radiated Fields of a Line-Current Antenna in Earth-Ionosphere Waveguide
Author :
Liu Chao ; Zheng Long-gen ; Li Yong-Pin
Author_Institution :
Electron. Eng. Coll., Naval Univ. of Eng., Wuhan, China
Abstract :
The empirical formulas for extremely low frequency (ELF) radiated fields of a line-current antenna grounding at each end in the Earth-ionosphere waveguide have been given in some literatures. But the derivation of the radiated fields in spherical waveguide is mathematically not strict. In this paper, a scalar wave function is used in mode theory of wave propagation to closely solve ELF radiated field of a vertical electric dipole (VED) located in the spherical Earth-ionosphere waveguide. The closed-form formulas for the radiated fields of a line-current antenna grounding at each end are obtained by an application of the reciprocity theorem.
Keywords :
Earth-ionosphere waveguide; antenna radiation patterns; circular waveguides; dipole antennas; waveguide antennas; ELF radiated field; VED antenna; closed-form formula; extremely-low-frequency radiated field; line-current antenna; reciprocity theorem; scalar wave function; spherical Earth-ionosphere waveguide; vertical electric dipole antenna; wave propagation theory; Antenna theory; Antennas and propagation; Closed-form solution; Dipole antennas; Frequency; Geophysical measurement techniques; Ground penetrating radar; Grounding; Wave functions; Waveguide theory;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5301548
