Indian Journal of Science and Technology
Year: 2011, Volume: 4, Issue: 7, Pages: 736-739
L. Okwara, B. J. Kwaha* and P. Amalu1
Department of Physics, University of Jos, Nigeria.
1Department of Physical Sciences, Ajayi Crowther University, Oyo. Nigeria.
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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