| ELECTROMAGNETIC ENERGY FLOW PATTERN ON THE AXIS OF A CIRCULAR DISK BY TRANSIENT EXCITATION |
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| 作者姓名： | 朱贤阳 汪文秉 任朗 |
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| 作者单位： | Xi'an Jiaotong University，Xi'an 710049，Xi'an Jiaotong University，Xi'an 710049，Southwest Jiaotong University，Chengdu 610031 |
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| 摘 要： | The exact energy flow pattern on the axis of a circular disk by transient excitation is presented in this paper. It has been shown that non-decaying region does not appear when the source is chosen to be a rectangular pulse, on the contrary, there exists a uprising region on the axis when the width of the pulse is less than a/c. After reaching its maximum value point, the energy decays slowly until the law of r-2 is met. The scale of the uprising region is dependent upon the size of the antenna and the width of the pulse. It has also been shown that there exists a oscillatory region near the source for a harmonic excitation, and the amplitude is also uprising, which is quite different compared with the conclusion drawn by S. Silver(1949). Finally, the phenomenon of energy uprising in time domain is explained and some problems about the electromagnetic missiles are also expounded.
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Electromagnetic energy flow pattern on the axis of a circular disk by transient excitation |
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| Zhu Xianyang,Wang Wenbing,Ren Lang.ELECTROMAGNETIC ENERGY FLOW PATTERN ON THE AXIS OF A CIRCULAR DISK BY TRANSIENT EXCITATION[J].Journal of Electronics,1994,11(3):253-261. |
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| Authors: | Zhu Xianyang Wang Wenbing Ren Lang |
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| Affiliation: | (1) Xi’an Jiaotong University, 710049 Xi’an;(2) Southwest Jiaotong University, 610031 Chengdu |
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| Abstract: | The exact energy flow pattern on the axis of a circular disk by transient excitation is presented in this paper. It has been shown that non-decaying region does not appear when the source is chosen to be a rectangular pulse, on the contrary, there exists a uprising region on the axis when the width of the pulse is less than a/c. After reaching its maximum value point, the energy decays slowly until the law of r-2 is met. The scale of the uprising region is dependent upon the size of the antenna and the width of the pulse. It has also been shown that there exists a oscillatory region near the source for a harmonic excitation, and the amplitude is also uprising, which is quite different compared with the conclusion drawn by S. Silver(1949). Finally, the phenomenon of energy uprising in time domain is explained and some problems about the electromagnetic missiles are also expounded. |
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| Keywords: | Electromagnetic energy Circular disk Near field Fresnel region Electromagnetic missiles |
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