Abstract
This article presents the results of the performance evaluation of three (3) elements non-uniform length Star Array Antenna at UHF frequency band. In very many applications, it is desired to design antenna configuration that has higher directional properties to fulfill some demand in communication systems. Star shapes Pentagram and Hexagram (Penta-Hexa) gram elements were designed and configured to form an antenna array whose radiation properties can be controlled by varying the amplitude allotment of the three antenna elements, so as to obtain smaller side lobes and highly directional star array antenna configuration.. The antenna was constructed based on the design specifications using an Aluminum sheet MatlabR2014a was use to plot the radiation pattern of individual element and that of the whole elements combined together. The Performance analysis of the UHF Star array shows a Dolph-Tschebyscheff field pattern with main lobes maximum at θ=π and θ=2π and with infinitesimal side lobes. Further evaluations give the half-power beamwidth (HPBW) of the UHF Star array to be 4.8° and directivity of 5.17dB. The UHF Star Array shows good performance when compared with a standard antenna. The test performance of the UHF (Penta-Hexa)gram Star Array antenna shows that it will be very suitable for the reception of UHF signals in automobiles and homes.
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