@misc{10481/94501,
year = {2022},
month = {1},
url = {https://hdl.handle.net/10481/94501},
abstract = {A 3-D printed Fresnel-lens antenna formed by dielectric unit cells insensitive to polarization
is presented in this article. The proposed unit cell can be implemented in any azimuth orientation,
simplifying the design and the implementation of the Fresnel subzones, which is an advantage over
the previous 3-D-printed Fresnel-lens designs. The unit cell exhibits a T-shaped geometry capable
of providing no change in relative permittivity under TE polarizations orthogonal to each other.
The novel design of the unit cell also provides robustness under oblique incidence and frequency.
These features allow the radial arrangement of the unit cells to configure the subzones of the Fresnel
lens, ensuring the desired relative permittivity. Additionally, the geometry of the printed unit
cells enables self-supported subzones with the minimum number of unit cells per subzone. A 3-Dprinted
prototype of the proposed Fresnel lens was manufactured by stereolithography (SLA). The
measurement results showed a good agreement with the simulated ones. The measured gain was
26.5   0.5 dBi from 55 GHz to 65 GHz with a mean antenna efficiency of 79%.},
organization = {Spanish Government under Project PID2020-
112545RB-C54; in part by “Junta de Andalucía” under Project B-TIC-402-UGR18, Project A-TIC-608-
UGR20, Project P18.RT.4830, and Project PYC20-RE-012-UGR},
organization = {European Regional
Development Fund and Junta de Extremadura under Project IB18003; and in part by the Predoctoral
Grant FPU18/01965},
publisher = {MDPI},
keywords = {3-D printing},
keywords = {Fresnel lens},
keywords = {millimeter-waves},
title = {Polarization-Insensitive Unit Cells for a Cost-Effective Design of a 3-D-Printed Fresnel-Lens Antenna},
doi = {10.3390/electronics11030338},
author = {Moreno Rodríguez, Salvador and Balmaseda-Márquez, Miguel A. and Carmona-Murillo, Javier and Palomares-Caballero, Ángel},
}