Compact dual-band RF rectifier for wireless energy harvesting using CRLH technique

Abstract

<p>In this paper, a new dual-band radio frequency (RF) rectifier was designed. The proposed design is a low-profile structure with dimensions of <br /> 5×5.5 mm<sup>2</sup> owing to the use of lumped elements rather than the conventional transmission lines which occupy large footprints. This property can be potentially exploited to use the proposed rectifier in high dense rectenna arrays to generate high output direct current (DC) voltages. Furthermore, the proposed design adopts the composite right/left-handed composite right left-handed (CRLH) technique to realize the dual-band structure at frequencies of 1.8 and 2.4 GHz. Afterward, the matching circuit was optimized to make sure that it offers good matching. The frequency response shows good matching at both bands which are about -22 and -25 dB respectively. Eventually, the simulated circuit has a conversion efficiency of 52% and output voltages of 0.5 V at -5 dBm for the two bands.</p>

A review of the state of art and prospects in energy storage systems for energy harvesting applications

“…The flywheel energy storage (FES) system stores electrical energy in the form of rotating kinetic energy [19]- [21]. This system exemplifies the mechanical system that has a quick response and is hence known ISSN: 2252-8814  as the FES system.…”