天線模式項(xiàng)散射分析與天線RCS減縮
ANTENNA-MODE SCATTERING COMPONENT AND RCS REDUCTION
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摘要: 天線的散射場(chǎng)是由結(jié)構(gòu)散射場(chǎng)和模式散射場(chǎng)兩項(xiàng)組成。理論分析和實(shí)驗(yàn)結(jié)果表明,后者對(duì)天線的雷達(dá)散射截面(RCS)的貢獻(xiàn)比前者要大得多,有效地克服模式散射場(chǎng)將會(huì)明顯地降低天線的RCS。本文提出了一種以克服面天線模式散射場(chǎng)達(dá)到降低天線雷達(dá)截面的模式項(xiàng)消去法減縮天線RCS技術(shù),并在幾種天線模型上進(jìn)行了實(shí)驗(yàn)。實(shí)驗(yàn)結(jié)果證明,這種技術(shù)減縮天線RCS的效果,不管在天線工作頻帶內(nèi)還是頻帶外均可達(dá)到10～15dB。模式項(xiàng)消去法減縮技術(shù)是一種降低面天線RCS的新途徑,比其它減縮技術(shù)頻帶更寬,具有較好的工程適用性。
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關(guān)鍵詞:
- 天線; 天線散射; 雷達(dá)散射截面; 隱身技術(shù)
Abstract: The radar cross-section (RCS) of antennas can be divided in to two parts, one is the common structural scattering component, another is the antenna-mode scattering component produced by antenna s re-radiation. Three kinds of antenna s RCS are discussed and the measured antenna s RCS reduction by the method of minimizing the mode scattering component are given. The experimental results show that the RCS reduction is about 10-15 dB both in the operating band and outside the band. The technique expressed in th... -
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