| Autor: |
Petr Kadera, Jesus Sanchez-Pastor, Hossein Eskandari, Tomas Tyc, Masoud Sakaki, Martin Schusler, Rolf Jakoby, Niels Benson, Alejandro Jimenez-Saez, Jaroslav Lacik |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
IEEE Access. 2022, vol. 10, issue 1, p. 41097-41111. |
| DOI: |
10.26083/tuprints-00021395 |
| Popis: |
This paper presents a quasi-conformal transformation optics (QCTO) based three-dimensional (3D) retroreflective flattened Luneburg lens for wide-angle millimeter-wave radio-frequency indoor localization. The maximum detection angle and radar cross-section (RCS) are investigated, including an impedance matching layer (IML) between the lens antenna and the free-space environment. The 3D QCTO Luneburg lenses are fabricated in alumina by lithography-based ceramic manufacturing, a 3D printing process. The manufactured structures have a diameter of 29.9 mm (4 λ0), showing a maximum realized gain of 16.51 dBi and beam steering angle of ±70° at 40 GHz. The proposed QCTO Luneburg lens with a metallic reflective layer achieves a maximum RCS of -20.05 dBsqm at 40 GHz with a wide-angle response over ±37°, while the structure with an IML between the lens and air improves these values to a maximum RCS of -15.78 dBsqm and operating angular response between ±50°. CA extern |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
