扭極化變形卡塞格倫天線的雷達截面分析
RCS ANALYSIS OF MODIFIED CASSEGRAINIAN ANTENNA WITH POLARIZATION ROTATOR
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摘要: 扭極化變形卡氏天線由于其結(jié)構(gòu)上和電氣上的一系列優(yōu)點,已被廣泛地應(yīng)用于飛行器雷達系統(tǒng),但對這種天線的散射特性和雷達截面(RCS),至今尚未進行系統(tǒng)的理論和實驗研究。本文從天線散射機理出發(fā),分析了這種天線對帶內(nèi)外各種極化波的RCS,給出了軸向入射時天線RCS的計算結(jié)果。
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關(guān)鍵詞:
- 卡塞格倫天線; 雷達截面; 電磁散射
Abstract: Modified Cassegrainian antenna with polarization rotator has been widely used in the airborne radar systems because of its electrical and structural advantages. Up to now, however, the scattering aspect of this antenna has not been systematically investigated theroe-tically and experimentally. In this paper, the radar cross-section (RCS) of this antenna under the incidence of EM waves of various frequencies and polarizations is evaluated based on antenna scattering theory. The numerical results show that this kind of antenna contributes a substantial RCS in the nose-on region, and it will be quite a difficult task to reduce its RCS contribution without- degradation of antenna performances. -
謝處方,邱文杰,天線原理與設(shè)計,西北電訊工程學(xué)院出版社,西安,1985年, 第320-323頁.[2][2][3]阮穎錚,電子學(xué)報,18(1990)6, 92-96.[4]阮穎錚,宇航學(xué)報,11(1990)4,94-100.[5]鄧書輝,阮穎錚,電子科技大學(xué)學(xué)報,19(1990)5,519-526.[6]鄧書輝,阮穎錚,電子科學(xué)學(xué)刊,12(1990)4,361-368.[7]鄧書輝,阮穎錚,航空學(xué)報,12(1991)5,294-302.[8]鄧書輝,阮穎錚,宇航學(xué)報,12(1991)1,84-88.[9]E.F.Knott等著,阮穎錚等譯,雷達散射截面,電子工業(yè)出版社,北京,1988年,第112-155頁. -
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