Fabrication and simulation of optimized loaded helical antennas | ||||
| The International Conference on Electrical Engineering | ||||
| Article 4, Volume 6, 6th International Conference on Electrical Engineering ICEENG 2008, May 2008, Page 1-10 PDF (282.04 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/iceeng.2008.34186 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Ahmed Ibrahim Salem | ||||
| Faculty of Air Defense, Alexandria, Egypt. | ||||
| Abstract | ||||
| Abstract: In this paper the helical antenna is considered with different helix diameters; uniform, linear, conical and exponential diameter variations are loaded at different positions. All helices are mounted on infinite ground planes and analyzed using NEC commercial code based on the moment methods. 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 conical helix gives better performance. Fabrication of uniform and conical helices is accomplished by their accurate dimensions .The results clarify that the laboratory measured values is very close to the computed results. | ||||
| Keywords | ||||
| Helical antenna; NEC commercial code | ||||
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