Potato Battery
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IEEE JOURNAL ON EMERGING AND SELECTED TOPICS IN CIRCUITS AND SYSTEMS, VOL. 2, NO. 1, MARCH 2012
Design Optimization and Implementation for RF Energy Harvesting Circuits
Prusayon Nintanavongsa, Student Member, IEEE, Ufuk Muncuk, David Richard Lewis, and
Kaushik Roy Chowdhury, Member, IEEE
Abstract—A new design for an energy harvesting device is proposed in this paper, which enables scavenging energy from radiofrequency (RF) electromagnetic waves. Compared to common alternative energy sources like solar and wind, RF harvesting has the least energy density. The existing state-of-the-art solutions are effective only over narrow frequency ranges, are limited in efficiency response, and require higher levels of input power. This paper has a twofold contribution. First, we propose a dual-stage energy harvesting circuit composed of a seven-stage and ten-stage design, the former being more receptive in the low input power regions, while the latter is more suitable for higher power range. Each stage here is a modified voltage multiplier, arranged in series and our design provides guidelines on component choice and precise selection of the crossover operational point for these two stages between the high (20 dBm) and low power ( 20 dBm) extremities. Second, we fabricate our design on a printed circuit board to demonstrate how such a circuit can run a commercial Mica2 sensor mote, with accompanying simulations on both ideal and non-ideal conditions for identifying the upper bound on achievable efficiency. With a simple yet optimal dual-stage design, experiments and characterization plots reveal approximately 100% improvement over other existing designs in the power range of 20 to 7 dBm.
Index Terms—Optimization, power efficiency, radio-frequency
(RF) energy harvesting circuit, Schottky diode, sensor, voltage multiplier, 915 MHz.
I. INTRODUCTION
W
ITH the growing popularity and applications of largescale, sensor-based wireless networks (e.g., structural health monitoring,
IEEE JOURNAL ON EMERGING AND SELECTED TOPICS IN CIRCUITS AND SYSTEMS, VOL. 2, NO. 1, MARCH 2012
Design Optimization and Implementation for RF Energy Harvesting Circuits
Prusayon Nintanavongsa, Student Member, IEEE, Ufuk Muncuk, David Richard Lewis, and
Kaushik Roy Chowdhury, Member, IEEE
Abstract—A new design for an energy harvesting device is proposed in this paper, which enables scavenging energy from radiofrequency (RF) electromagnetic waves. Compared to common alternative energy sources like solar and wind, RF harvesting has the least energy density. The existing state-of-the-art solutions are effective only over narrow frequency ranges, are limited in efficiency response, and require higher levels of input power. This paper has a twofold contribution. First, we propose a dual-stage energy harvesting circuit composed of a seven-stage and ten-stage design, the former being more receptive in the low input power regions, while the latter is more suitable for higher power range. Each stage here is a modified voltage multiplier, arranged in series and our design provides guidelines on component choice and precise selection of the crossover operational point for these two stages between the high (20 dBm) and low power ( 20 dBm) extremities. Second, we fabricate our design on a printed circuit board to demonstrate how such a circuit can run a commercial Mica2 sensor mote, with accompanying simulations on both ideal and non-ideal conditions for identifying the upper bound on achievable efficiency. With a simple yet optimal dual-stage design, experiments and characterization plots reveal approximately 100% improvement over other existing designs in the power range of 20 to 7 dBm.
Index Terms—Optimization, power efficiency, radio-frequency
(RF) energy harvesting circuit, Schottky diode, sensor, voltage multiplier, 915 MHz.
I. INTRODUCTION
W
ITH the growing popularity and applications of largescale, sensor-based wireless networks (e.g., structural health monitoring,
References: [1] N. Tesla, “The transmission of electric energy without wires,” in 13th Anniversary Number of the Electrical World and Engineer, 1904. [2] J. Curty, M. Declercq, C. Dehollain, and N. Joehl, Design and Optimization of Passive UHF RFID Systems. New York: Springer, 2007. Embedded Networked Sensor Syst., Nov. 2–4, 2005, p. 309. power transfer systems,” in IEEE Radio Wireless Symp., Jan. 2009, pp. [8] M. M. Tentzeris and Y. Kawahara, “Novel energy harvesting technologies for ICT applications,” in IEEE Int. Symp. Appl. Internet, 2008, pp. Jun. 2010, pp. 1–9. Sensors, Veldhoven, The Netherlands, 2005. IEEE Globecom, Dec. 2010, pp. 1–5. Quality (ICREPQ’10), Mar. 2010, pp. 486–495.