Near-field to far-field transformation applied to UHF antennas over lossy ground

Abstract : This paper deals with a near-field to far-field transformation able to predict the radiation of UHF antennas located over a lossy ground. From in-situ near-field measurements, an equivalent set of dipole sources is obtained as a model of the characterized antenna. The paper details the main steps of the transformation and describes the specific experimental set-up designed for the application. Simple directional antennas (monopoles array) as well as more complex omnidirectional antennas (like a biconical antenna as a scaled-down model of a HF antenna) have been tested in realistic environments. This approach is very efficient for separating the contributions of the radiated waves: the sky wave and the surface wave.
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Submitted on : Tuesday, October 1, 2019 - 9:55:16 AM
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Nicolas Bourey, Muriel Darces, Yves Chatelon, Marc Hélier. Near-field to far-field transformation applied to UHF antennas over lossy ground. International Journal of Microwave and Wireless Technologies, Cambridge University Press/European Microwave Association 2019, pp.1-6. ⟨10.1017/S1759078719001272⟩. ⟨hal-02302095⟩

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