Abstract
The transmission characteristics of electromagnetic wave (EM-waves) in discharge plasma have been investigated theoretically and experimentally. A model was developed to calculate the reflection, absorption and transmission of the EM-waves with a perpendicular incidence angle to the uniform non-magnetized plasma as a function of the plasma frequency at different collision frequencies. The attenuation of EM-waves after passing the discharge plasma at different pressures was also measured experimentally. It is shown that the dense plasma produced by the glow discharge at pressure of 25~600Pa in argon can attenuate the 9.1GHz EM-wave by 17dB. The discharge plasma is feasible to block the EM waves of X-band efficiently and to be used in EM shielding.
Original language | English |
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Pages (from-to) | 43-45 |
Number of pages | 3 |
Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
Volume | 29 |
Issue number | SUPPL. 2 |
Publication status | Published - Aug 2009 |
Keywords
- Electromagnetic shield
- Electromagnetic wave
- Hollow cathode discharge
- Plasma