變厚度非平面介質(zhì)罩發(fā)散系數(shù)的計(jì)算幾何光學(xué)法
CALCULATION OF THE DIVERGENCE FACTOR OF DIELECTRIC CONFORMAL DOME PHASED ARRAY ANTENNA--GEOMETRIC OPTICS METHOD
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摘要: 介質(zhì)共形頂相控陣天線利用變厚度介質(zhì)透鏡改變相控陣波束掃描方向,理論上來說可到達(dá)半空域或更大,是一種適用于彈載、機(jī)載雷達(dá)系統(tǒng)的天線。本文較詳細(xì)地討論了介質(zhì)罩對(duì)電磁波的發(fā)散系數(shù)的計(jì)算,給出了分析非平面變厚度分層介質(zhì)對(duì)電磁波反射、折射的兩種有效方法,并進(jìn)行了比較。
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關(guān)鍵詞:
- 共形陣; 相控陣天線; 幾何光學(xué)法; Jacobi式; 曲率矩陣
Abstract: Dielectric conformal dome phased array antenna uses the dielectric dome to change the direction of the scanning beam. It is supposed to widen the scan-range of planar phased array to half spherical space or more. It is suitable for missiles and air-borne radars. When analysise its scanning characteristics, the divergence factor(DF) of the dome must be calculated. This paper provides two methods to study the DF which are based on geometrical optics, and compares them. These methods are very useful in studying the reflection and the refraction of the non-planar layered dielectric. -
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