Indian Journal of Science and Technology
DOI: 10.17485/ijst/2011/v4i7.10
Year: 2011, Volume: 4, Issue: 7, Pages: 736-739
Original Article
L. Okwara, B. J. Kwaha* and P. Amalu1
Department of Physics, University of Jos, Nigeria.
1Department of Physical Sciences, Ajayi Crowther University, Oyo. Nigeria.
[email protected]
In this paper, an array dipole antenna adaptable to VHF and UHF bands was designed and constructed. The dimension (length and spacing) of the parasitic elements (directors) were determined: the longest length being 17.0cm and the shortest 5.3cm. The widest spacing was 3.58cm and the shortest 1.27cm. The characteristics of the antenna were determined at a frequency of 189.5MHz. It has an input impedance of 96.72Ω and a gain of 2.15dBi. It performs optimally in frequency range of 60MHz- 300MHz as attested using TV (receive only) monitor. It adapts favourably well to the VHF and lower UHF bands.
Keywords: Dipole antenna, design
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