DocumentCode :
1361513
Title :
Experimental and Numerical Investigation on Electromagnetic Absorption and Diffraction by the Plasma-Covered Cavity
Author :
He, Xiang ; Chen, Jianping ; Chu, Ran ; Chen, Yudong ; Zeng, Xiaojun ; Zhu, Tuo ; Ni, Xiaowu
Author_Institution :
Sch. of Sci., Nanjing Univ. of Sci. & Technol., Nanjing, China
Volume :
38
Issue :
12
fYear :
2010
Firstpage :
3342
Lastpage :
3347
Abstract :
To produce a plasma layer (area of 1.3 m2 and power of 1.8 kW) covering the inner surface of a metal cavity (diameter of 45 cm and length of 120 cm), a certain number of standard commercial fluorescent lamps were placed directly against one another. Electromagnetic (EM) scattering of a 1- to 3-GHz EM wave has been studied experimentally and theoretically for a metal cavity and a plasma-covered metal cavity. When the EM wave hits the cavity at the front aspect angle, a significant return loss of as large as 10 dB in the frequency of 1-2 GHz and trends to a peak of 20-30 dB near 1.25-1.5 GHz were observed. Using the finite-difference time-domain method, transient scattered fields of EM wave from cavities were achieved. The loss of the EM wave with covered plasma was proved to be a result of the absorption by the plasma, but not from the turning or bending of the wave entering the plasma.
Keywords :
finite difference time-domain analysis; plasma electromagnetic wave propagation; plasma-wall interactions; electromagnetic absorption; electromagnetic diffraction; electromagnetic scattering; electromagnetic wave; finite-difference time-domain method; frequency 1 GHz to 3 GHz; front aspect angle; inner surface; plasma layer; plasma-covered metal cavity; power 1.8 kW; return loss; size 120 cm; size 45 cm; standard commercial fluorescent lamps; transient scattered fields; wave bending; wave turning; Cavity resonators; Electromagnetic scattering; Finite difference methods; Loss measurement; Plasma measurements; Plasmas; Time domain analysis; Cavity; electromagnetic (EM) scattering; finite-difference time-domain (FDTD) method; plasma; transient phenomena;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/TPS.2010.2084596
Filename :
5610735
Link To Document :
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