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

This letter presents the integration of frequency selective surfaces (FSSs) with retroreflectors
for the realization of chipless wireless indoor localization tag landmarks. As an example, the …

This article introduces retroreflective lenses for millimeter-wave radio-frequency indoor
localization. A three-dimensional (3D) gradient-index Luneburg lens is employed to …

The paper describes the development of passive, chipless tags for a novel indoor self-
localization system operating at high mm-wave frequencies. One tag concept is based on …

In this work we demonstrate that 3D printed Al 2 O 3 is a promising material for prototy**
and precise fabrication of quasi-optical devices in the terahertz frequency range. The 3D …

In this paper, we propose a Photonic Crystal (PhC) resonator based corner reflector for
sensing the Angle-of-Arrival (AoA) of the incident wave from an interrogator. The sensor is …

This contribution discusses the impact of sintering temperatures on dielectric properties of
3D‐printed alumina (Al2O3) in the W‐band, by evaluating high quality factor (− Q) …

An earlier version of this paper was presented at the 2021 15th European Conference on
Antennas and Propagation (EuCAP) and was published in its Proceedings. This paper …

This paper discusses a temperature-dependent characterization of deep reactive ion-etched
10 k Ω cm high-resistive silicon (DRIE HR-Si), 3D printed alumina (A l_2O_3) and milled …

Dihedral corner reflectors with arrays of dielectric resonators fixed on the metal plates are
shown to exhibit notched spectral signatures of the monostatic Radar Cross Section. Two …