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We propose a remedy for the unphysical oscillations arising in the current distribution of carbon nanotube and imperfectly conducting antennas center driven by a delta-function generator when the approximate kernel… Click to show full abstract
We propose a remedy for the unphysical oscillations arising in the current distribution of carbon nanotube and imperfectly conducting antennas center driven by a delta-function generator when the approximate kernel is used. We do so by formulating an effective current, which was studied in detail in 2011 and 2013 papers, for a perfectly conducting (PC) linear cylindrical antenna of infinite length, with application to the finite-length antenna. We discuss our results in connection with the PC antenna, providing perturbative corrections to the current distribution for a large conductance, as well as presenting a delta sequence and the field of a Hertzian dipole for the effective current in the limit of vanishing conductance. To that end, we employ both analytical tools and numerical methods to compare with the experimental results.
Journal Title: IEEE Transactions on Antennas and Propagation
Year Published: 2019
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