螺旋-圆柱波导系统特征值的研究
STUDY ON THE EIGENVALUES OF THE HELIX-CYLINDRICAL WAVEGUIDE SYSTEM
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摘要: 本文给出了螺旋-圆柱波导系统的特征方程,首次求得了此结构的复根模,推导出了实根模、虚根模和复根模相互之间的分界条件,并给出了一些特征值曲线。最后,利用特征方程近似计算了一个螺旋-圆锥喇叭天线的远场辐射方向图,数值结果与实验进行了很好的比较。
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关键词:
- 螺旋-圆柱波导系统; 特征值; 螺旋天线
Abstract: The eigenvalue equation of the helix-cylindrical waveguide system is derived and the complex roots of this system are obtained for the first time. The separation conditions among the real, imaginary and complex root modes are derived. A set of eigenvalue curves are presented. The radiation pattern of a helicone antenna is approximately calculated based on the eigenvalue equation. The numerical results agree with the previously measured data. -
Kraus J D. Antennas. New York: McGraw-Hill, 1988, Chapter 7.[2]Nakano H, Mimaki H. Radiation from a short helical antenna backed by a cavity[J].Electron. Lett..1995, 31(8):602-604[3]王刚,刘刚,金亚秋.螺旋-圆锥喇叭天线的理论分析.电波科学学报,1996, 11(4): 36-44.[4]R.E.柯林著,吕继尧译.微波工程基础.北京:人民邮电出版社,1981: 444-448.[5]Caver K R. The helicone--A circularly polarized antenna with low sidelobe level[J].Proc. IEEE.1967,55(3):559-560 -
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