蒸發(fā)波導(dǎo)中電磁波異常傳播特征研究及其應(yīng)用
Study on Anomalous Propagation Characteristics of Electromagnetic Waves in Evaporation Duct Environments and its Application
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摘要: 蒸發(fā)波導(dǎo)是海洋大氣環(huán)境中一種典型的異常大氣折射結(jié)構(gòu)。它能夠部分地陷獲電磁波的傳播，從而改變電磁波的傳播特征。這種特性在雷達、通信、電子對抗等設(shè)備的使用方面具有廣泛的應(yīng)用。該文主要利用電磁波傳播的拋物型數(shù)值方程和裂步傅里葉算法，通過仿真方法研究了蒸發(fā)波導(dǎo)環(huán)境下電磁波所具有的異常傳播特征，并利用2003年8月大連海域的雷達異常探測試驗作為應(yīng)用實例，說明了蒸發(fā)波導(dǎo)對電磁波異常傳播以及對雷達異常性能的影響。
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關(guān)鍵詞:
- 電磁波; 蒸發(fā)波導(dǎo); 異常傳播特征;雷達;性能評估
Abstract: Evaporation duct is a kind of typical anomalous profile of atmospheric refractivity, it can partly trap electromagnetic waves, as a result, the propagation characteristics are changed, which may be applied in electronic equipments such as radar, communication and ECM, etc. The purpose of this article is to study on anomalous characteristics of electromagnetic waves in evaporation duct environment through simulation methods based on electromagnetic waves propagation parabolic numerical equation and split-step Fourier algorithm technology. The experimental data of radar abnormal detection in Dalian Sea Area in October of 2003 is analyzed as an example of application to validate the abnormal characteristics of the electromagnetic waves and the anomalous detection of radar influenced by evaporation ducts. -
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