DocumentCode :
1555616
Title :
An accurate theoretical model for the thin-wire circular half-loop antenna
Author :
Zhou, Guangping ; Smith, Glenn S.
Author_Institution :
Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Volume :
39
Issue :
8
fYear :
1991
fDate :
8/1/1991 12:00:00 AM
Firstpage :
1167
Lastpage :
1177
Abstract :
The conventional Fourier series analysis for the thin-wire circular transmitting loop, or its image equivalent to the half-loop, uses a delta-function generator for excitation. This method of excitation introduces two problems: it does not correspond to any realizable method of feeding the antenna, so an accurate comparison with measurement is not possible, and it produces a divergent series for the input susceptance. To overcome these problems, a new theoretical model is used for the antenna: a half-loop driven through an image plane by a coaxial transmission line, with a transverse electromagnetic mode assumed in the aperture of the coaxial line. This model is solved in a manner that preserves the simplicity of the original Fourier series analysis. All coefficients are obtained as closed-form expressions. Input admittances calculated from this new theoretical model are in excellent agreement with accurate measurements
Keywords :
antenna theory; electric admittance; loop antennas; Fourier series analysis; TEM mode; accurate theoretical model; closed-form expressions; coaxial transmission line; image plane; input admittance; input susceptance; thin-wire circular half-loop antenna; transmitting loop; transverse electromagnetic mode; Antenna feeds; Antenna measurements; Aperture antennas; Coaxial components; Electromagnetic measurements; Electromagnetic modeling; Fourier series; Image analysis; Transmission line antennas; Transmission line measurements;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/8.97352
Filename :
97352
Link To Document :
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