| Autor: |
Jaemin Kim, Gleb A. Egorov, George V. Eleftheriades |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
IEEE Access, Vol 10, Pp 130285-130292 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2169-3536 |
| DOI: |
10.1109/ACCESS.2022.3229050 |
| Popis: |
Over the past decades, many radome designs to extend the angular scan range of phased-array antennas have been devised by utilizing dielectric materials and metamaterials. More recently, metasurface technology such as planar lenses and beam deflectors have been applied to phased arrays, enabling scan-angle enhancers to have a low profile. In this work, a physical Huygens’ metasurface (HMS) two-lens system for scan-angle doubling of a phased array is presented. For the HMS unit cells, the wire-loop topology is deployed to achieve high transmission for the required phase-angle shift. The proposed two-lens system is analyzed by full-wave simulations and experiments. The simulation results demonstrate that the scan angle doubles when the incident angle is below 15° in accordance to the design specification. Furthermore, the directivity degradation of the refracted beams by the two-HMS lenses is in good agreement with theory. Finally, a fabricated two-lens system with two $15\lambda $ long by $15\lambda $ wide metasurface lenses and a $16\times 16$ -element patch antenna array as a source is experimentally verified at ${\mathrm {10 \text {GHz}}}$ . The experimental results are in good agreement with the simulated results by showing angle-doubling performance with ±2° scan errors. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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