Journal
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
Volume 12, Issue -, Pages 918-921Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LAWP.2013.2272873
Keywords
Antenna array; energy harvesting; rectenna; rectifier; Yagi-Uda antenna
Funding
- Singapore Ministry of Education Academic Research Fund [R-263-000-667-112]
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This letter presents a dual-band rectenna that can harvest ambient RF power of GSM-1800 and UMTS-2100 bands efficiently. The novel rectenna is based on a broadband 1 x 4 quasi-Yagi antenna array with bandwidth from 1.8 to 2.2 GHz and high gains of 10.9 and 13.3 dBi at 1.85 and 2.15 GHz, respectively. Also, a dual-band rectifier that can sufficiently enhance the RF-to-dc power conversion efficiency (PCE) at ambient RF power level is designed for the rectenna. Measurement results show that a PCE of 40% and an output dc voltage of 224 mV have been achieved over a 5-k Omega resistor when the dual-tone input power density is 455 mu W/m(2). Additionally, output dc voltage varying between 300-400 mV can be obtained by collecting the relatively low ambient RF power.
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