Highly efficient wireless energy harvesting system using metamaterial based compact CP antenna

Kush Agarwal, Tanuja Mishra, Muhammad Faeyz Karim, N. Nasimuddin, Michael Ong Ling Chuen, Yong Xin Guo, Sanjib Kumar Panda

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

22 Citations (Scopus)

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%.

Original languageEnglish
Title of host publication2013 IEEE MTT-S International Microwave Symposium Digest, MTT 2013
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1-4
Number of pages4
ISBN (Electronic)9781467361767
ISBN (Print)9781467361774, 9781467361750
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event2013 IEEE MTT-S International Microwave Symposium Digest, MTT 2013 - Seattle, WA, United States
Duration: 2 Jun 20137 Jun 2013

Other

Other2013 IEEE MTT-S International Microwave Symposium Digest, MTT 2013
CountryUnited States
CitySeattle, WA
Period2/06/137/06/13

Keywords

  • Circular polarized antenna
  • Energy harvesting
  • Metamaterial
  • Periodic structures
  • Reactive impedance surface

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