螺旋-圓柱波導(dǎo)系統(tǒng)特征值的研究
STUDY ON THE EIGENVALUES OF THE HELIX-CYLINDRICAL WAVEGUIDE SYSTEM
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摘要: 本文給出了螺旋-圓柱波導(dǎo)系統(tǒng)的特征方程,首次求得了此結(jié)構(gòu)的復(fù)根模,推導(dǎo)出了實(shí)根模、虛根模和復(fù)根模相互之間的分界條件,并給出了一些特征值曲線。最后,利用特征方程近似計(jì)算了一個(gè)螺旋-圓錐喇叭天線的遠(yuǎn)場(chǎng)輻射方向圖,數(shù)值結(jié)果與實(shí)驗(yàn)進(jìn)行了很好的比較。
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關(guān)鍵詞:
- 螺旋-圓柱波導(dǎo)系統(tǒng); 特征值; 螺旋天線
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]王剛,劉剛,金亞秋.螺旋-圓錐喇叭天線的理論分析.電波科學(xué)學(xué)報(bào),1996, 11(4): 36-44.[4]R.E.柯林著,呂繼堯譯.微波工程基礎(chǔ).北京:人民郵電出版社,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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