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Temporal Skewness of Electromagnetic Pulsed Waves Propagating Through Random Media with Embedded Irregularity Slab |
| XU Zheng-Wen1,2;WU Jian2;HUO Wen-Ping2; WU Zhen-Se1 |
| 1School of Science, Xidian University, Xi’an 710071
2National Key Laboratory of Electromagnetic Environment, China Research Institute of Radiowave Propagation, Beijing 102206 |
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| Cite this article: |
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XU Zheng-Wen, WU Jian, HUO Wen-Ping et al 2003 Chin. Phys. Lett. 20 370-373 |
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Abstract Electromagnetic pulsed waves can be distorted in the propagation through random media, and their energy distributions change along the leading and trailing edge of the waveform, which can be presented by the temporal skewness. The skewness presents asymmetry and is treated by the third order temporal moment, in which an analytic solution for the two-frequency mutual coherence function is obtained recently. Then, transionospheric pulses are discussed in details. Both theoretical analysis and numerical computation indicate that the contributions from scattering and dispersion of irregularities dominate over those of background, so the latter can be neglected in most cases. Also, the temporal skewness of a transionospheric pulse is negative and energy is shifted to the leading edge.
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| Keywords:
41.20.Jb
94.20.Bb
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Published: 01 March 2003
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| PACS: |
41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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94.20.Bb
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(Wave propagation)
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