Parasitic effects of the metallic towers on the characteristics of the broadcast antennas |
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| Authors: | Abdul Ali Paolo Colantonio Ayhan Altintas |
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| Affiliation: | 1. Department of Electronics Engineering, University of Rome Torvergata, Rome, Italy;2. Department of Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey |
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| Abstract: | In this article, we use a tool NEC (Numerical Electromagnetic Code) to model antenna on top of a tower structure. Simulation results for the parasitic effect of the tower on characteristics of broadcast DVB‐T (Digital Video Broadcasting Terrestrial) antenna such as input impedance, return loss, gain, front‐to‐back ratio and radiation patterns are reported. In addition, the effect of a nearby tower on antenna characteristics is studied. A 3D tower and broadband antenna in the UHF (470‐862) MHz band are constructed. The antenna works for both digital and analog TV with return loss (RL) ≥ 10 dB, fractional bandwidth of 87% and gain of 12.3 dBi at center frequency. The effective radiated power is calculated by mounting the antenna at each face of the tower to give a satisfactory coverage to a region around the antenna. |
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| Keywords: | Broadcast DVB‐T ERP NEC parasitic tower UHF |
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