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在归一化雨滴谱分布、雨滴的介电模型和Mie散射理论的基础上计算群雨滴在微波波段的散射和衰减特性,讨论分析雨滴谱分布、降雨强度、入射波频率和温度等因素对微波传输特性的影响.数值模拟结果表明,不同谱分布的群雨滴散射能力从大到小依次为JD,MP,Gamma和JT分布,降雨强度对微波传输特性的影响最大,入射波频率次之,温度的影响最小.所得出的结论有助于准确评估降雨对微波传输的影响以及提高利用测雨雷达和毫米波雷达等定量探测降水的精度.
Based on the normalized distribution of raindrops, the dielectric model of raindrops and the Mie scattering theory, the scattering and attenuation characteristics of raindrops in the microwave band are calculated. The effects of raindrop spectral distribution, rainfall intensity, incident frequency and temperature on the microwave The numerical simulation results show that the scattering ability of the raindrops with different spectral distributions is in the order of JD, MP, Gamma and JT, and the rainfall intensity has the greatest influence on the microwave transmission characteristics. The incident wave frequency is the second, and the temperature The conclusions reached help to accurately assess the impact of rainfall on microwave transmission and to improve the accuracy of quantitatively detecting precipitation using rain radar and millimeter-wave radar.