Micro-size antenna structure with vertical nanowires for wireless power transmission and communication

Jong Gu Kang, Yeri Jeong, Jeong Hee Shin, Ji Woong Choi, Jung Inn Sohn, Seung Nam Cha, Jae Eun Jang

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

For biomedical implanted devices, a wireless power or a signal transmission is essential to protect an infection and to enhance durability. In this study, we present a magnetic induction technique for a power transmission without any wire connection between transmitter (Tx) and receiver (Rx) in a micro scale. Due to a micro size effect of a flat spiral coil, a magnetic inductance is not high. To enhance the magnetic inductance, a three dimensional magnetic core is added to an antenna structure, which is consisted of ZnO nano wires coated by a nickel (Ni) layer. ZnO nano wires easily supply a large effective surface area with a vertical structural effect to the magnetic core structure, which induces a higher magnetic inductance with a ferro-magnetic material Ni. The magnetic induction antenna with the magnetic core shows a high inductance value, a low reflection power and a strong power transmission. The power transmission efficiencies are tested under the air and the water medium are almost the same values, so that the magnetic induction technique is quite proper to body implanted systems.

Original languageEnglish
Pages (from-to)8205-8210
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume14
Issue number11
DOIs
StatePublished - 1 Nov 2014

Keywords

  • Magnetic core
  • Magnetic induction
  • Nanowire

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