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Wide-Angle Ceramic Retroreflective Luneburg Lens Based on Quasi-Conformal Transformation Optics for Mm-Wave Indoor Localization | IEEE Journals & Magazine | IEEE Xplore

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


Novel alumina-based QCTO lens able to steer transmitted and received EM waves in +- 70° for both azimuth and elevation, fabricated sample of the lens and 3D radiation pat...

Abstract:

This paper presents a quasi-conformal transformation optics (QCTO) based three-dimensional (3D) retroreflective flattened Luneburg lens for wide-angle millimeter-wave rad...Show More

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 ( 4 \lambda _{0} ), 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°.
Novel alumina-based QCTO lens able to steer transmitted and received EM waves in +- 70° for both azimuth and elevation, fabricated sample of the lens and 3D radiation pat...
Published in: IEEE Access ( Volume: 10)
Page(s): 41097 - 41111
Date of Publication: 11 April 2022
Electronic ISSN: 2169-3536

Funding Agency:


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