Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Investigation of 3D Printed Electrically Small Folded Spherical Meander Wire Antenna

  • Kong, Myeongjun (Department of Electrical Engineering, Chungnam National University) ;
  • Shin, Geonyeong (Department of Electrical Engineering, Chungnam National University) ;
  • Lee, Su-Hyeon (Department of Electrical Engineering, Chungnam National University) ;
  • Yoon, Ick-Jae (Department of Electrical Engineering, Chungnam National University)
  • Received : 2017.08.07
  • Accepted : 2017.09.24
  • Published : 2017.10.31
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Abstract

The radiation properties and fabrication precautions of a 3D printed, electrically small folded spherical meander wire monopole antenna are investigated. The antenna is self-resonant and shows sufficiently high radiation efficiency at an electrical size ka of 0.4, with the radiation quality factor Q approaching the lower physical bound. In antenna fabrication, the possible structural deformation due to gravity is examined before the antenna frame is 3D-printed. The required conductivity is achieved by multiple manual paintings of a silver paste. The radiation efficiency and pattern show very good agreement with the computed expectations, whereas the resonant frequency deviates by 11.8%. The method to minimize such a fabrication error when using 3D printing technology for wire antennas is discussed.

Keywords

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