DocumentCode
3182803
Title
Helical antennas with nonuniform helix diameter
Author
Elkamchouchi, Hassan M. ; Salem, Ahmed I.
Volume
1
fYear
2001
fDate
2001
Firstpage
143
Abstract
On this paper the helical antenna is considered with different helix diameters, uniform, linear, exponential and logarithmic diameter variations are considered. In each case, the radiation fields in the principal planes, the gains, axial ratio and current distributions are obtained. Also the input impedance is calculated as the frequency varies around the design values for each case. In all cases the pitch is taken constant. The numerical evaluations indicate that the exponential helix gives better performance
Keywords
UHF antennas; VHF antennas; antenna radiation patterns; current distribution; electric impedance; helical antennas; 300 MHz; axial ratio; current distributions; exponential diameter variations; gain; helical antennas; input impedance; linear diameter variations; logarithmic diameter variations; nonuniform helix diameter; performance; principal plane; radiation fields; uniform diameter variations; Frequency; Helical antennas;
fLanguage
English
Publisher
ieee
Conference_Titel
Radio Science Conference, 2001. NRSC 2001. Proceedings of the Eighteenth National
Conference_Location
Mansoura
Print_ISBN
977-5031-68-0
Type
conf
DOI
10.1109/NRSC.2001.929187
Filename
929187
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