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Wide-Angle Ceramic Retroreflective Luneburg Lens Based on Quasi-Conformal Transformation Optics for Mm-Wave Indoor Localization

Kadera, Petr ; Sanchez-Pastor, Jesus ; Eskandari, Hossein ; Tyc, Tomas ; Sakaki, Masoud ; Schüßler, Martin ; Jakoby, Rolf ; Benson, Niels ; Jimenez-Saez, Alejandro ; Lacik, Jaroslav (2022):
Wide-Angle Ceramic Retroreflective Luneburg Lens Based on Quasi-Conformal Transformation Optics for Mm-Wave Indoor Localization. (Publisher's Version)
In: IEEE Access, 10, pp. 41097-41111. IEEE, e-ISSN 2169-3536,
DOI: 10.26083/tuprints-00021395,
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Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Status: Publisher's Version
Title: Wide-Angle Ceramic Retroreflective Luneburg Lens Based on Quasi-Conformal Transformation Optics for Mm-Wave Indoor Localization
Language: English
Abstract:

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 ( 4λ0 ), 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°.

Journal or Publication Title: IEEE Access
Volume of the journal: 10
Place of Publication: Darmstadt
Publisher: IEEE
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP) > Microwave Engineering
Date Deposited: 18 May 2022 12:10
Last Modified: 18 Aug 2022 13:04
DOI: 10.26083/tuprints-00021395
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-213950
Additional Information:

INDEX TERMS: Transformation optics, Luneburg lens, impedance matching, lens antenna, retroreflector, ceramic 3D printing, indoor localization, mm-wave, artificial dielectrics, chipless RFID

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21395
PPN: 494867450
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