Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Attenuation Effects of Plasma on Ka-Band Wave Propagation in Various Gas and Pressure Environments

  • Lee, Joo Hwan (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Joonsuk (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Yuna (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Sangin (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Kim, Doo-Soo (Agency for Defense Development) ;
  • Lee, Yongshik (Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Yook, Jong-Gwan (Department of Electrical and Electronic Engineering, Yonsei University)
  • Received : 2017.10.31
  • Accepted : 2018.01.24
  • Published : 2018.01.31
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Abstract

This work demonstrates attenuation effects of plasma on waves propagating in the 26.5-40 GHz range. The effect is investigated via experiments measuring the transmission between two Ka-band horn antennas set 30 cm apart. A dielectric-barrier-discharge (DBD) plasma generator with a size of $200mm{\times}100mm{\times}70mm$ and consisting of 20 layers of electrodes is placed between the two antennas. The DBD generator is placed in a $400mm{\times}300mm{\times}400mm$ acrylic chamber so that the experiments can be performed for plasma generated under various conditions of gas and pressure, for instance, in air, Ar, and He environments at 0.001, 0.05, and 1 atm of pressure. Attenuation is calculated by the difference in the transmission level, with and without plasma, which is generated with a bias voltage of 20 kV in the 0.1-1.4 kHz range. Results show that the attenuation varies from 0.05 dB/m to 9.0 dB/m depending on the environment. Noble gas environments show higher levels of attenuation than air, and He is lossier than Ar. In all gas environments, attenuation increases as pressure increases. Finally, electromagnetic models of plasmas generated in various conditions are provided.

Keywords

References

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