PhotonIcs and Electromagnetics Research Symposium,
also known as Progress In Electromagnetics Research Symposium
PIERS Proceedings
Published: 2015-07-09
A Moment-method Analysis of a Thin-wire Chireix-coil Antenna
By
Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9,Page(s)112-117
Abstract
Using a moment-method solution technique in an Electric-Field Integral Equation (EFIE) formulation approach, this presentation examines certain performance characteristics of the electrically thin-wire √ variety of the Chireix-coil antenna, whose geometry as defined by [2] is given by Cλ = 1 + 2Sλ , where the parameters (Cλ , Sλ ), respectively symbolize helix circum- ference and turn spacing, measured in units of wavelength at the operating frequency. Computational results obtained for the Chireix coil with 4-, 6-, 8-, and 10-turns suggest that the maximum value of magnitude of current distributed along the axis of the antenna is more or less independent of number of antenna turns. And the results also indicate that when Sλ is less than 0.9, the radiation field (Eθ , Eϕ ) patterns on the azimuthal plane consist of two diametrically directed majors; which degenerate into four distinct lobes (with relative maxima along ϕ = 0◦ , 90◦ , 180◦ , and 270◦ axes) for values of Sλ in excess of 1.0. A particularly remarkable feature of these radiation field pattern characteristics is that they appear to be independent of the number of coil turns.
Citation
Sulaiman Adeniyi Adekola, Ayotunde Abimbola Ayorinde, and Alex Ike Mowete, "A Moment-method Analysis of a Thin-wire Chireix-coil Antenna," Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9,Page(s)112-117
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