A Sensitive Triple-Band Rectifier for Energy Harvesting Applications

Abstract

This paper presents a novel sensitive triple-band power rectifier for RF energy harvesting systems. The proposed rectifier can simultaneously harvest RF energy from GSM-900, GSM-1800, and Wi-Fi-2450 bands at relatively low and medium ambient power densities. Previously, a few multi-band rectennas have been reached a stable conversion efficiency overall frequency bands of interest because of the nonlinearity and the distinct input impedance of the rectifying circuit at these frequencies. The originality of this paper is on the improved impedance matching technique that enhances the efficiency and performance of the rectifier. The proposed high-efficiency triple-band rectifier consists of three parallel branches. Each branch comprises an input matching circuit designed to provide maximum RF power transferred to rectifying diodes, a single voltage doubler using Schottky diode HSMS-2852, and a DC-pass filter to smooth the DC output voltage. A prototype of the proposed rectifier circuit is fabricated and tested to verify its performance against the simulation results. With an optimum load resistance of 3.8 k at-10 dBm input power level, the measured RF to DC conversion efficiency achieves 33.7%, 21.8%, and 20% at 0.9, 1.8 and 2.45 GHz respectively. The efficiency is above 46.5 % overall bands of interest under 0 dBm input power. INDEX TERMS RF energy harvesting, RF to DC conversion efficiency, Schottky diode, triple-bands rectifier.

A New Non-Linear Joint Model for RF Energy Harvesters in Wireless Networks

“…We = 0.68, 0.85 GHz for [17], and = 0.9, 1.8, 2.45 GHz for [38]. It can be shown that this ratio is approximately independent of and only dependent of and .…”

“…The results in [10], [17], [38]- [41] provide the conversion efficiency versus frequency at different input power levels and the conversion efficiency versus input power at different frequencies. This gives…”

Triple-Band Single-Layer Rectenna for Outdoor RF Energy Harvesting Applications

“…The maximum conversion efficiency was 67.4% for the GSM-1800 frequency band and input power of −3 dBm. The authors in [ 25 ] presented a triple-band rectifier that was operating in the frequency bands of GSM-900, GSM-1800, and Wi-Fi 2.4 GHz. They reported a measured RF-to-DC conversion efficiency of 52% for an input power of 0 dBm and the frequency band of GSM-900.…”

A radio frequency energy harvesting rectenna for GSM , LTE , WLAN, and WiMAX

“…[1][2][3][4][5][7][8][9][10][11][12][13] Several single band structures for ambient energy harvesting are presented in. 14,15 Thedual-band, 13,16,17 triple-band, 7,18,19 or quad-band 20 rectenna are some methods to improve the amount of energy harvested. To obtain a multi-band rectenna, all sections of the rectenna must be multi-band.…”