Design of a Highly Efficient Wideband Multi-Frequency Ambient RF Energy Harvester

Sensors

Jun-Jiat Tiang¹  Mardeni Bin Roslee¹  Md. Tanvir Ahmed¹  Sunanda Roy¹  Abbas Z. Kouzani²  M. A. Parvez Mahmud² 

[1] Faculty of Engineering (FOE), Multimedia University, Persiaran Multimedia, Cyberjaya 63000, Malaysia;School of Engineering, Deakin University, Waurn Ponds, Geelong, VIC 3216, Australia;

关键词: ambient;    broadband rectifier;    log periodic antenna;    quad band;    RF energy harvesting;    RF spectral survey;   

DOI  :  10.3390/s22020424

来源: DOAJ

【 摘 要 】

For low input radio frequency (RF) power from −35 to 5 dBm, a novel quad-band RF energy harvester (RFEH) with an improved impedance matching network (IMN) is proposed to overcome the poor conversion efficiency and limited RF power range of the ambient environment. In this research, an RF spectral survey was performed in the semi-urban region of Malaysia, and using these results, a multi-frequency highly sensitive RF energy harvester was designed to harvest energy from available frequency bands within the 0.8 GHz to 2.6 GHz frequency range. Firstly, a new IMN is implemented to improve the rectifying circuit’s efficiency in ambient conditions. Secondly, a self-complementary log-periodic higher bandwidth antenna is proposed. Finally, the design and manufacture of the proposed RF harvester’s prototype are carried out and tested to realize its output in the desired frequency bands. For an accumulative −15 dBm input RF power that is uniformly universal across the four radio frequency bands, the harvester’s calculated dc rectification efficiency is about 35 percent and reaches 52 percent at −20 dBm. Measurement in an ambient RF setting shows that the proposed harvester is able to harvest dc energy at −20 dBm up to 0.678 V.

【 授权许可】

Unknown