SubTHz Fully-Metallic Geodesic Luneburg Lens Antenna
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| Názov: | SubTHz Fully-Metallic Geodesic Luneburg Lens Antenna |
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| Autori: | Castillo Tapia, Pilar, Yang, Shiyi, Palomares-Caballero, Angel, Guillet, Jean-Paul, Fonseca, N. J. G., Quevedo-Teruel, Oscar |
| Zdroj: | IEEE Transactions on Terahertz Science and Technology. 15(3):514-518 |
| Predmety: | Lenses, Antennas, Electromagnetic waveguides, Periodic structures, Antenna measurements, Metamaterials, Antenna feeds, Frequency measurement, Surface waves, Surface roughness, Electromagnetic bandgap (EBG) structure, fully metallic antenna, geodesic lens, Luneburg lens, subterahertz (subTHz) |
| Popis: | We propose and validate experimentally a fully metallic geodesic Luneburg lens antenna operating in the subTHz band. The antenna produces three beams pointing at 0 degrees, 40 degrees, and -40 degrees. To facilitate the integration, the geodesic lens is folded to reduce its height to approximately 38.7% of the original Rinehart-Luneburg lens. To reduce potential leakage resulting from manufacturing and assembly tolerances at subTHz frequencies, the waveguide feeding structure has a deliberate small air gap alongside electromagnetic bandgap structures. This enhancement aims to bolster the robustness of the antenna, ensuring stable performance even in the presence of misalignments. The results demonstrate the robustness of geodesic lenses in the subTHz regime; showing their suitability for applications that require multibeam antennas at these high frequencies. The successful performance of geodesic lenses in the subTHz regime confirms its potential for operation at higher frequencies above 300 GHz. |
| Popis súboru: | |
| Prístupová URL adresa: | https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-365267 https://doi.org/10.1109/TTHZ.2025.3548452 |
| Databáza: | SwePub |
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Nájsť tento článok vo Web of Science | Abstrakt: | We propose and validate experimentally a fully metallic geodesic Luneburg lens antenna operating in the subTHz band. The antenna produces three beams pointing at 0 degrees, 40 degrees, and -40 degrees. To facilitate the integration, the geodesic lens is folded to reduce its height to approximately 38.7% of the original Rinehart-Luneburg lens. To reduce potential leakage resulting from manufacturing and assembly tolerances at subTHz frequencies, the waveguide feeding structure has a deliberate small air gap alongside electromagnetic bandgap structures. This enhancement aims to bolster the robustness of the antenna, ensuring stable performance even in the presence of misalignments. The results demonstrate the robustness of geodesic lenses in the subTHz regime; showing their suitability for applications that require multibeam antennas at these high frequencies. The successful performance of geodesic lenses in the subTHz regime confirms its potential for operation at higher frequencies above 300 GHz. |
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| ISSN: | 2156342X 21563446 |
| DOI: | 10.1109/TTHZ.2025.3548452 |