圓柱天線罩電磁散射的復(fù)射線分析
ANALYSIS OF ELECTROMAGNETIC SCATTERING FOR CYLINDRICAL RADOMES
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摘要: 利用復(fù)射線近軸近似法和集合射線法,可以十分簡便地分析天線罩的電磁傳輸特性和散射特性。本文以二維圓柱形天線罩為例,分析了介質(zhì)罩對(duì)罩內(nèi)雷達(dá)天線性能的影響;計(jì)算了天線罩引起的傳輸系數(shù)和角跟蹤性能的變化,以及天線罩的附加雷達(dá)散射截面;討論了射線參量及天線、天線罩參量對(duì)分析計(jì)算精度的影響。數(shù)值結(jié)果表明,這種分析方法可以顯著地簡化天線罩優(yōu)化設(shè)計(jì),并可適用于其它多種型式的天線罩。
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關(guān)鍵詞:
- 天線; 天線罩; 電磁散射; 復(fù)射線
Abstract: EM transmission and scattering characteristics of radome may Conveniently be analyzed by complex ray paraxial approximation and collective ray methods. 2-D cylindrical radomes are analyzed and calculated, including radome transmission coefficient, radar angular track property and radar cross-section of radomes, as well as the effect of ray parameters and antenna-radome parameters on computation accuracy. It is shown that this method can be used to simplify optimization designs for many kinds of radomes. -
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