From conservation law of energy not possible to create or to destroy the energy but we can transform or change one form into another. The main purpose of this paper is to put light on the characteristics of radio frequency based energy harvesting systems. In all the cases mentioned above that the devices or the appliances can be operated without the usage of cables battery panels connectors which can make these devices more mobile and portable while operation and charging as well. These all can be achieved by RF energy harvesting system and the main reason for this is that it is accordingly free energy. The sources of RF based energy harvesting system are increasing day by day same as mobile based transmitters from which more and more energy can bring in. This paper more importantly focuses on parameters to design the system, methods, different frequency ranges that can be utilized and the respective circuitry for converting Low voltage output to High voltage for various applications using RF based energy harvesting.

Wireless sensor network, RF energy, Harvesting

[1]. H. Yan, J.G. Macias Montero, A. Akhnoukh, L.C.N. de Vreede and J.N. Burghart.” An Integration Scheme for RF Power Harvesting. 8th Annual Workshop on Semiconductor Advances for Future Electronics and Sensors”, Veldhoven, the Netherlands, 2005.
[2]. P. Nintanavongsa, U. Muncuk, D. R. Lewis, and K. R. Chowdhury, “Design Optimization and Implementation for RF Energy Harvesting Circuits”. IEEE Journal on Emerging and Selected Topics in Circuits and Systems, vol. 2, no. 1, pp. 24-33, Mar. 2012.
[3]. C. Mikeka and H. Arai, “Design issues in radio frequency energy harvesting system,” Sustainable Energy Harvesting Technologies - Past, Present and Future, December 2011.
[4]. M. Al-Lawati, M. Al-Busaidi, and Z. Nadir, “RF energy harvesting system design for wireless sensors,” in Proc. of IEEE International Multi-Conference on Systems, Signals and Devices (SSD), pp. 1-4, Chemnitz, German, March 2012.
[5]. K. M. Farinholt, G. Park, and C. R. Farrar, “RF energy transmission for a low-power wireless impedance sensor node,” IEEE Sensors Journal, vol. 9, no. 7, pp. 793-800, July 2009.
[6]. U. Olgun, C.-C. Chen, and J. L. Volakis, “Design of an efficient ambient WiFi energy harvesting system,” IET Microwaves, Antennas & Propagation, vol. 6, no. 11, pp. 1200-1206, August 2012.
[7]. H. Jabbar, Y. S. Song, and T. T. Jeong, “RF energy harvesting system and circuits for charging of mobile devices,” IEEE Transactions on Consumer Electronics, vol. 56, no. 1, pp. 247-253, February 2010.
[8]. D. Y. Choi, “Comparative study of antenna designs for RF energy harvesting,” Hindawi International Journal of Antennas and Propagation, February 2013.
[9]. P. Nintanavongsa, U. Muncuk, D. R. Lewis, and K. R. Chowdhury, “Design optimization and implementation for RF energy harvesting circuits,” IEEE Journal on Emerging and Selected Topics in Circuits and Systems, vol. 2, no. 1, pp. 24-33, March 2012.
[10]. D. Masotti, A. Costanzo, and S. Adami, “Design and realization of a wearable multi-frequency RF energy harvesting system,” in Proc. of IEEE European Conference on Antennas and Propagation (EUCAP), pp. 517-520, Rome, Italy, April 2011.
[11]. P. Nintanavongsa, U. Muncuk, D. R. Lewis, and K. R. Chowdhury, “Design optimization and implementation for RF energy harvesting circuits,” IEEE Journal on Emerging and Selected Topics in Circuits and Systems, vol. 2, no. 1, pp. 24-33, March 2012.
[12]. S. Keyrouz, H. J. Visser, and A. G. Tijhuis, “Multi-band simultaneous radio frequency energy harvesting,” in Proc. of IEEE European Conference on Antennas and Propagation (EuCAP), pp. 3058-3061, Gothenburg, Sweden, April 2013.
[13]. Visser HJ,Vullers RJ.”RF energy harvesting and transport for wireless sensor network applications: principles and requirements”. Proc IEEE.2013 ; 101:1410–1423.
[14]. Shaikh FK, Zeadally S. Energy harvesting in wireless sensor networks: A comprehensive review. Renew Sustain EnergyRev.2016;55:1041–1054.
[15]. Umeda, T., Yoshida, H., Sekine, S., Fujita, Y., Suzuki, T., & O taka, S. (2006).” A 950-MHz rectifier circuit for sensor network tags with 10-m distance”. IEEE Journal of Solid-State Circuits, 41(1), 35–41.
[16]. Nakamoto, H., et al. (2006). A passive UHF RF identification CMOS tag IC using ferroelectric RAM in 0.35-lm technology. IEEE Journal of Solid-State Circuits, 42(1), 101–110.
[17]. Le, T., Mayaram, K., & Fiez, T. (2008).” Efficient far-field radio frequency energy harvesting for passively powered sensor networks. IEEE Journal of Solid-State Circuits”, 43(5), 1287–1302. 43. Papotto, G., Carrara, F., & Palmisano, G. (2011). A 90-nm CMOS threshold-compensated RF energy harvester. IEEE Journal of Solid-State Circuits, 46(9), 1985–1997.
[18]. 44. Giannakas, G., Plessas, F., & Stamoulis, G. (2012). Pseudo-FG technique for efficient energy harvesting. Electronics Letters, 48(9), 522–523.Scorcioni, S., Larcher, L., & Bertacchini, A. (2013). “A reconfigurable differential CMOS RF energy scavenger with 60% peak efficiency and -21 dB m sensitivity”. IEEE Microwave and Wireless Components Letters, 23(3), 155–157.
[19]. Mansano, A., Bagga, S., & Serdijn, W. (2013). “A high efficiency orthogonally switching passive charge pump rectifier for energy harvesters”. IEEE Transactions on Circuits and Systems I: Regular Papers, 60(7), 1959–1966.
[20]. Xia, L., Cheng, J., Glover, N. E., & Chiang, P. (2014). 0.56 V, -20 dB m RF-powered, multi-node wireless body area network system-on-a-chip with harvesting-efficiency tracking loop. IEEE Journal of Solid-State Circuits, 49(6), 1345–1355.
[21]. Hameed Z., & Moez, K. (2015). A 3.2 V -15 dBm adaptive threshold-voltage compensated RF energy harvester in 130 nm CMOS. IEEE Transactions on Circuits and Systems I: Regular Papers, 62(4), 948–956.
[22]. Wang X, Mortazawi A.” High sensitivity RF energy harvesting from AM broadcasting stations for civilian infrastructure degradation monitoring”. IEEE International Wireless Symposium (IWS); 2013Apr14–18;Beijing,China,IEEE.
[23]. Lee S-Y, Tsai T-M,LaiW-C,etal.A 925MHz 1.4 μW wireless energy-harvesting circuit with error correction ASK demodulation for RFID healthcare system. IEEE International Symposium on Circuits and Systems(ISCAS);2015 May 24–27;Lisbon,Portugal,IEEE.
[24]. Duong V-H, Hieu NX, Lee H-S, et al. A battery-assisted passive EPC Gen-2 RFID sensor tag IC with efficient battery power management and RF energy harvesting. IEEE Trans Ind Electron. 2016;63: 7112–7123.
[25]. Zaman M, Wong HY, Islam MS, et al. An integrated hybrid energy harvester for autonomous wireless sensor network nodes .Int J Photoenergy.2014;2014:1–8.
[26]. Wang X, Mortazawi A. High sensitivity RF energy harvesting from AM broadcasting stations for civilian infrastructure degradation monitoring .IEEE International Wireless Symposium(IWS);2013 Apr 14–18;Beijing,China,IEEE.
[27]. LiuH,LiX,VaddiR,etal. Tunnel FETRF rectifier design for energy harvesting applications. IEEEJ Emerg Sel Top Circuits Syst. 2014;4:400–411.
[28]. Martins GC, de Sousa FR. An RF-powered temperature sensor designed for biomedical applications. 26th Symposium on Integrated Circuits and Systems Design (SBCCI); 2013 Sept 2–6; Curitiba,Brazil,IEEE.
[29]. LeeS-Y,TsaiT-M,LaiW-C,etal.A925MHz1.4 μW wireless energy-harvesting circuit with error correction ASK demodulation for RFID healthcare system. IEEE International Symposium on Circuits and Systems(ISCAS); 2015 May 24–27;Lisbon,Portugal,IEEE.
[30]. RosaRL,ZoppiG,FinocchiaroA,etal.Anover-the-distancewirelessbatterychargerbasedonRF energy harvesting.14th International Conferenceon Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design(SMACD); 2017Jun 12–15;GiardiniNaxos,Italy, IEEE.
[31]. Duong V-H, Hieu NX, Lee H-S, et al. A battery-assisted passive EPC Gen-2 RFID sensor tag IC with efficient battery power management and RF energy harvesting. IEEE Trans Ind Electron. 2016;63:7112–7123.