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dc.titleHighly efficient wireless energy harvesting system using metamaterial based compact CP antenna
dc.contributor.authorAgarwal, K.
dc.contributor.authorMishra, T.
dc.contributor.authorKarim, M.F.
dc.contributor.authorNasimuddin, N.
dc.contributor.authorChuen, M.O.L.
dc.contributor.authorGuo, Y.X.
dc.contributor.authorPanda, S.K.
dc.identifier.citationAgarwal, K.,Mishra, T.,Karim, M.F.,Nasimuddin, N.,Chuen, M.O.L.,Guo, Y.X.,Panda, S.K. (2013). Highly efficient wireless energy harvesting system using metamaterial based compact CP antenna. IEEE MTT-S International Microwave Symposium Digest : -. ScholarBank@NUS Repository. <a href="" target="_blank"></a>
dc.description.abstractThis paper presents a highly efficient 2.4 GHz wireless energy harvesting system comprising of a metamaterial based circularly polarized (CP) antenna and a power management circuit. The antenna is designed at 2.4 GHz using a circular slotted truncated corner square patch radiator placed on reactive impedance surface (RIS) for antenna size miniaturization, better impedance matching and to improve the front-to-back ratio. The power management system integrates a matching circuit with a single stage Dickson charge pump and an ultra low power with high efficiency DC/DC boost converter/charger. The Dickson charge pump uses three schottky diodes to minimize the losses at high frequency. The DC-DC converter (BQ25504) is capable of acquiring and managing low power levels. The measured axial ratio (boresight) is below 3-dB for the entire 2.40-2.48 GHz band and the 10-dB return loss band is from 2.35-2.49 GHz. The gain (boresight) of the antenna is around 4.6 dBic at 2.44 GHz. The proposed antenna shows an improvement in front-to-back ratio of around 3 dB with size reduction of approximately 22%. The power management system generates an output voltage level of 1.5 volts at -10 dBm and 4 volts at 0 dBm input RF power respectively. The overall efficiency of the proposed energy harvesting system is above 28%. © 2013 IEEE.
dc.subjectCircular polarized antenna
dc.subjectEnergy harvesting
dc.subjectPeriodic structures
dc.subjectReactive impedance surface
dc.typeConference Paper
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.sourcetitleIEEE MTT-S International Microwave Symposium Digest
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