We demonstrate the application of a bull's-eye (BE) leaky-wave antennas (LWA) for enhanced conical direction finding, leveraging its inherent conical-beam frequency-scanning capability. Unlike uniform or quasi-uniform 2-D LWAs, such as Fabry-Perot antennas, the 2-D periodic BE-LWA uses a higher-order space harmonic to radiate. This enables the use of both backward- and forward-scanning frequency bands to improve the conical direction-finding performance, when compared to the use of a single scanning band. Also, the BE LWA presents rotational symmetry and thus more stability in the direction finding performance for any azimuthal angle. This is demonstrated with experiments using a printed-circuit BE LWA offering a total scanning operating band from 14 GHz to 32 GHz and covering an elevation field-of-view of 120° with fully azimuthal symmetry.
Conical direction finding using frequency-scanned bull's-eye leaky-wave antennas for UAV tracking applications / Gil-Martinez, A.; Comite, D.; Wojciak, D.; Riaz, S.; Podilchak, S.; Gomez-Tornero, J. L.. - In: IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS. - ISSN 1536-1225. - 24:12(2025), pp. 4670-4674. [10.1109/LAWP.2025.3608278]
Conical direction finding using frequency-scanned bull's-eye leaky-wave antennas for UAV tracking applications
Comite D.;Podilchak S.;
2025
Abstract
We demonstrate the application of a bull's-eye (BE) leaky-wave antennas (LWA) for enhanced conical direction finding, leveraging its inherent conical-beam frequency-scanning capability. Unlike uniform or quasi-uniform 2-D LWAs, such as Fabry-Perot antennas, the 2-D periodic BE-LWA uses a higher-order space harmonic to radiate. This enables the use of both backward- and forward-scanning frequency bands to improve the conical direction-finding performance, when compared to the use of a single scanning band. Also, the BE LWA presents rotational symmetry and thus more stability in the direction finding performance for any azimuthal angle. This is demonstrated with experiments using a printed-circuit BE LWA offering a total scanning operating band from 14 GHz to 32 GHz and covering an elevation field-of-view of 120° with fully azimuthal symmetry.| File | Dimensione | Formato | |
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