Please use this identifier to cite or link to this item:
|Title:||Highly efficient wireless energy harvesting system using metamaterial based compact CP antenna||Authors:||Agarwal, K.
|Keywords:||Circular polarized antenna
Reactive impedance surface
|Issue Date:||2013||Citation:||Agarwal, 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. https://doi.org/10.1109/MWSYM.2013.6697693||Abstract:||This 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.||Source Title:||IEEE MTT-S International Microwave Symposium Digest||URI:||http://scholarbank.nus.edu.sg/handle/10635/83800||ISBN:||9781467361767||ISSN:||0149645X||DOI:||10.1109/MWSYM.2013.6697693|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jun 23, 2019
checked on Jun 21, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.