Shaping the Axial-Ratio Footprint of Crossed-Dipole Antennas

TitleShaping the Axial-Ratio Footprint of Crossed-Dipole Antennas
Publication TypeConference Paper
Year of Publication2014
Refereed DesignationRefereed
AuthorsNarbudowicz, A, Ammann, MJ, Przewocki, J
Conference NameLAPC - Loughborough Antennas & Propagation Conference
Conference Start Date10/11/2014
Conference LocationLoughborough, UK

A method is proposed to adaptively change the axial-ratio beam of simple circularly-polarized antennas. It is
shown, that by varying the phase shift between two orthogonal elements the axial-ratio beam shape can be dynamically adjusted.
This allows control of the direction of minimum axial-ratio and the ability to increase or decrease the beamwidth in one of two planes. The method is intended for satellite navigation systems: it can improve the rejection of reflected signals in varying propagation conditions (e.g. urban canyons), while using simple and low-cost circularly-polarized antennas.

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