dc.contributor.author Abd-Alhameed, Raed A. * dc.contributor.author Excell, Peter S. * dc.date.accessioned 2009-08-05T07:41:24Z dc.date.available 2009-08-05T07:41:24Z dc.date.issued 2002 dc.identifier.citation Abd-Alhameed, R.A. and Excell, P. S. (2002). Complete Surface Current Surface Distribution in a Normal-Mode Helical Antenna using a Galerkin Solution with Sinusoidal Basis Functions. IEE Proceedings - Science, Measurement and Technology. Vol 149, No. 5, pp. 272-276. en dc.identifier.uri http://hdl.handle.net/10454/3209 dc.description No en dc.description.abstract An investigation of the surface current distribution in a normal-mode helical antenna (NMHA) is reported. This enables precise prediction of the performance of NMHAs, since traditional wire-antenna simulations ignore important details, such as non-uniform and transverse current distributions. A moment-method formulation is developed, using two-dimensional basis functions to represent the total non-uniform surface current distribution over the surface of the wire of the helix. Piecewise-sinusoidal basis functions are employed in two normal directions, with an exact kernel formulation and application of Galerkin's solution method. The numerical solution of the singular integrals associated with self-impedance terms was computed with a very low relative error. The surface current distribution was computed for different helix geometries. It was found that the axially-directed component of the current distribution around the surface of the wire was highly non-uniform and that there was also a significant circumferential current flow due to inter-turn capacitance, both effects that are overlooked by standard filamentary current representations. en dc.language.iso en en dc.relation.isreferencedby http://dx.doi.org/10.1049/ip-smt:20020568 en dc.subject Normal-mode helical antenna en dc.subject Non-uniform and transverse current distributions en dc.subject Galerkin's solution method en dc.subject Helix geometries en dc.subject Surface Current Surface Distribution en dc.subject Sinusoidal Basis Functions en dc.title Complete Surface Current Surface Distribution in a Normal-Mode Helical Antenna using a Galerkin Solution with Sinusoidal Basis Functions. en dc.status.refereed Yes en dc.type Article en dc.type.version No full-text available in the repository en
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