Rectifier Integrated Multibeam Luneburg Lens Employing Artificial Dielectric as a Wireless Power Transfer Medium at Mm Wave Band

Abstract

In this paper, a rectifier integrated Luneburg lens is designed at K band for wireless power transfer (WPT) applications. The lens consists of two metallic layers with a gap of 0.3 mm between them and has been made by employing the glide symmetry technique. A flare is tailored to match the outer impedance of the lens to the free space impedance. Five microstrip tapers are used at intervals of 18 0 at the periphery of the lens to collect the energy from it. The rectifying circuits are co-designed and are integrated with these five tapered launchers so as to make the entire structure suitable for capturing the transmitted power from the solar power satellite wirelessly, and to convert it to the equivalent voltage. Finally, all the ports are connected with a common load for DC power combining, and the overall performance of the lens integrated rectifier as an energy harvesting system is reported in terms of its power conversion efficiency (PCE).

A Survey on Underwater Wireless Power and Data Transfer System

“…Similar to the concept of MI multi-coil and multi-layer antennas, piezoelectric devices as acoustic transmission antennas can be designed in a similar manner. This is as revealed by Vinnakota et al [55] in their research, where they designed a Rectifier Antenna for Wireless Power Transfer (WPT) using the Luneburg lenses principle, which is employed to capture micro-waves using metamaterial/metasurfaces.…”

Dielectric Metasurface Inspired Directional Multi-Port Luneburg Lens as a Medium for 5G Wireless Power Transfer—A Design Methodology

“…9(b) shows one such quadrant. A flare structure similar to that in [42] is added to match the lens aperture impedance to the free space. The lens diameter is chosen at 118 mm to ensure that the antenna delivers the acceptable beam-width for WPT applications [42].…”

“…A flare structure similar to that in [42] is added to match the lens aperture impedance to the free space. The lens diameter is chosen at 118 mm to ensure that the antenna delivers the acceptable beam-width for WPT applications [42]. Using this design methodology, the exploded view of complete lens structure is shown in Fig.…”

“…The designed inverse class F rectifier is studied for wireless power transfer using a multiport Luneburg lens as a receiving structure and this design can harvest from a wide angular range. The concept of integrating all the ports of the lens into a wireless power transfer network, similar to the combining methods reported in [27], [42], [63], is illustrated in Fig. 17, where the power received by the lens is connected to the rectifying network using impedance matching networks.…”

“…The authors in [41] investigate a two-dimensional glide-symmetric periodic dielectric unit cell and show that as compared to non-glide arrangements, glide symmetry removes the limitation of the narrow bandwidth and results in broadening the operating bandwidth and in lowering effective refractive indices with increased isotropy. In the recent past, authors in [42] have used rectifier integrated metallic Luneburg lens for wireless power transfer in 5G mm-wave band. However, it does not cover a wide and continuous coverage range, and also the DC combining does not produce good PCE over a fixed RF power density.…”