Antennas have come to play a significant role in the reception and
transmission of electromagnetic radiation or
signals which in turn have improved scientific research in the various
areas where they have been used. Astronomy is not left out; as a study of
everything beyond earth’s atmosphere, useful signals have to travel great
distances to reach us. Hence the need for equipment to detect such signals. The Helical Antenna is known to possess high gain (directivity) and can process signals with any type of orientation/polarization
which implies high sensitivity hence the desire to use it. Simulation was done
using the legacy 4NEC2 software. The purpose of this paper is to design a
circularly polarized helical antenna operating in axial mode that is suitable
for detection of neutral hydrogen line emission at the frequency of 1420MHz and
to show how it can be used as a feed for an off-set parabolic dish.
References
[1]
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[2]
Rahim, T. (2015) Theory of Helix Antenna. NWPU, Xi’an.
[3]
Kovar, S., Urbancokova, H., Valouch, J., Adamek, M. and Mach, V. (2017) Helical Antenna Design for Image Transfer. International Journal of Applied Engineering Research, 12, 4741-4746.
[4]
Jansen van Rensburg, J.P. (2012) The Design of a Two-Element Correlation Interferometer Operating at L-Band. M.Sc. Thesis, Stellenbosch University, Stellenbosch.
[5]
John, D.K. and Ronald, J.M. (2003) Ch. 8: Antennas for All Applications. 3rd Edition, McGraw Hill Series, Singapore, 222-240.
[6]
Kumar, L. (2015) Design of Helical Antenna Using 4NEC2. International Journal of Engineering Research and General Science, 3, 1394.
[7]
Arie, V. (2021) Numerical Electromagnetic Code (Version 5.9.3). Lawrence Livermore Lab US, Numerical Electromagnetic Code. https://www.qsl.net/4nec2
Zeain, M.Y., Abu, M., Zakaria, Z., Sariera, H.S.M. and Lago, H. (2018) Design of Helical Antenna for Wideband Frequency. International Journal of Engineering Research & Technology, 11, 595-603.
