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).
Highlights
Lenses are being used in various applications apart from optics such as acoustics [1], radars [2], medical systems [3] etc
In this paper, a rectifier integrated Luneburg lens is designed at K band for wireless power transfer (WPT) applications
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)
Summary
Lenses are being used in various applications apart from optics such as acoustics [1], radars [2], medical systems [3] etc. Since operating frequency of the design is 24 GHz, it is usually convenient to keep the number of external lumped components as low as possible due to the possible effects of fabrication tolerances on the final circuit performance At this frequency, very few works [32]–[38] have been explored for WPT. A rectifier integrated multibeam 2D graded refractive index (GRIN) Luneburg lens as a WPT medium with DC Combining feature is implemented and investigated numerically to operate at 24 GHz. A single series diode mounted compact feed is co-designed with it at the same frequency.
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