A novel rectifying circuit for microwave power harvesting system

Abstract

Many researchers continue to look for novel means to harvest energy and generate power using existing sources thus eradicating the need of batteries and power supplies which only add up to the cost of the system. A rectifier is the main component in energy harvesting circuits as it converts RF energy from available sources to DC power. This article aimed at developing a novel rectifying circuit to be used in harvesting applications at a frequency of 900 MHz. Besides, it is also aimed to enhance the output voltage of Cockcroft Walton rectifier circuit and Dickson rectifier. The design is built by integrating the Cockcroft Walton rectifier, arranged in series, with the Dickson rectifier, arranged in parallel. A Schottky diode HSMS 285C is selected for designing the rectifiers circuit. A simulation of the circuit was optimized utilizing ADS 2009. The rectifiers had been fabricated on an RT/Duroid 5880 (RO5880) printed circuit board (PCB) substrate with a dielectric constant and loss tangent of 2.2 and 0.0009, respectively. Simulation and experimental results show great output thresholds for the three models. The novel rectifier had the highest efficiency and output voltage.

Design of dual-band microstrip patch antenna with right-angle triangular aperture slot for energy transfer application

“…The rectenna implemented a SMS7630 rectifying diode that formed an output DC voltage of 1.57 V and an efficiency of 25.98%. Another work on this area of rectenna or antenna‐rectifier, circuit combination for energy harvesting are shows in several articles …”

Energy harvesting from far field RF signals

“…At the receiver side the antenna intercepts the EM waves and generates a small amount of voltage. In this system, the various types of antennas such as Dipole, Microstrip, Spiral, Coplananar, Spiral, Yagi‐Uda, patch, and parabolic can be used . However, selection of an antenna becomes critical issue as a small size antenna intercepts less EM signal whereas the larger become impractical.…”

Analysis of rectifier stage number and load resistance in an RF energy harvesting circuit

“…The RF energy harvesting devices a kind of rectifier circuits . One of the most widely known RF rectifier circuits is the Dickson rectifier . The circuit, which can basically respond to low current and voltage, provides achieving high power conversion efficiency and high DC voltage over the output load .…”

“…The circuit, which can basically respond to low current and voltage, provides achieving high power conversion efficiency and high DC voltage over the output load . In addition to being practical and simple, Dickson rectifier circuits are widely preferred because they are suitable for being developed . Another advantage of the energy harvesting process with Dickson circuits is that it creates a staged‐structure by adding the same rectifier circuit one after the other.…”