電磁波在光柵表面上反射和衍射的理論研究
THEORETICAL STUDIES OF REFLECTION AND DIFFRACTION OF EM WAVE BY GRATING
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摘要: 本文從嚴(yán)格的場(chǎng)匹配方法出發(fā),對(duì)電磁波在矩形截面光柵上的反射和衍射進(jìn)行了理論研究。對(duì)這種光柵作為頻率掃描天線的計(jì)算顯示出,不論滿足或不滿足布喇格條件,在較寬的角度范圍內(nèi)入射,經(jīng)調(diào)節(jié)槽寬和槽深都可獲得理想的耀射。對(duì)于不滿足布喇格條件,在兩個(gè)互易角中較大的一個(gè)入射時(shí),-1次衍射波有較高的效率和較寬的頻帶。而對(duì)這種光柵作為奧羅管中反射鏡的特性的理論計(jì)算指出,它具有極寬的頻帶。同時(shí)本文還給出了不同頻率平面波垂直入射時(shí)的等效光柵位置,以及電磁波在光柵表面反射時(shí)所引起的相位改變。
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關(guān)鍵詞:
- 頻率掃描天線; 光柵; -1次衍射波效率; 奧羅管; 反射功率; 等效光柵位置
Abstract: The electromagnetic field problem of a rectangular grating illuminated with TM wave is studied theoretically by means of rigorous field-matching and moment method. The numerical calculations show that the grating, as a frequency scan antenna, can produce perfect blazing in a wide range of incident angle only through adjusting the size of width and depth of the groove no matter Bragg condition is satisfied or not. Higher efficiency and broader frequency band of - 1 order diffraction wave can be achieved only at the larger reciprocal incident angle. And very broad frequency band can be expected when the grating is employed as a reflecting mirror in an orotron. The effective grating position and phase change of reflection wave by grating are also numerically presented. -
E. V. Jull, N. C. Beaulieu, An Unusual Reflection Grating Behaviour Suitable for Efficient Frequency Scanning, in 1980 IEEE Antennas Propagat., Soc. Symp. Dig., PQ, Canada, pp. 189-191.[2]A. Hessel, J. Schmoys, D. Y. Tseng, J. Opt. Soc. Am., 65(1975)4, 380-384.[3]E. V. Jull, N. C. Beaulieu, D. C. W. Hui, J. Opt. Soc. Am., A, 1(1984)2, 180-182.[4]F. S. Johansson, IEEE Trans. on AP, AP-37(1989)8, 996-1002.[5]F. S. Johansson, L. G. Josefsson, T. Lorentzon, IEEE Trans. on AP. AP-37(1989)8, 984-989.[6]V. K. Korneeukov, et al., Radiophys. Quantum Electronics, 20(1977)2, 197.[7]K. Mizuno, S. Ono, Y. Shibata, A New Electron Tube with a Perot Resonator for the Generation of Millimeter and Submillimeter Waves, Proc. of the Symp, on Submillimeter Waves, New York, N. Y., March 31, April 1, 2, (1970), pp. 115-134.[8]D. E. Wortman, et al., IEEE J. of QE, QE-17(1981)8, 1341-1348.[9]А.Ф.Александров и Друзие, Радиотехника и Электронника, 28(1983) 4, 763-766.[10]陳嘉鈕等,成都電訊工程學(xué)院學(xué)報(bào),15(1986)3,第1-9頁.[11]郭開周,宋文森,電子科學(xué)學(xué)刊,10(1988)1,35-41.[12]宋文森,高等電磁場(chǎng)理論,中國(guó)科學(xué)技術(shù)大學(xué)研究生院講義,1986年.[13]楊榮生,梳齒結(jié)構(gòu)(光柵)作為慢波系統(tǒng)和奧羅管中輻射系統(tǒng)時(shí)的特性的研究,中國(guó)科學(xué)院電子學(xué)研究所碩士學(xué)位論文,1989年7月. -
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