Ventral-aspect radar cross sections and polarization patterns of insects at X band and their relation to size and form
Ventral-aspect radar cross sections and polarization patterns of insects at X band and their relation to size and form
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DOI：
10.1080/01431161.2017.1320453
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发表时间：
2017-01-01
影响因子：
3.4
通讯作者：
Smith, A. D.
中科院分区：
文献类型：
--
作者：
Drake, V. A.;Chapman, J. W.;Smith, A. D.
一组数据的腹侧昆虫雷达截面（RCS）和偏振模式，在X波段（9.4 GHz，线偏振）在实验室钻机测量，已整理从一些来源。对这些数据进行了分析，以确定RCS参数（一个代表大小，两个代表偏振模式形状）与昆虫的质量和形态尺寸和形状之间的关系。一个改进的质量估计关系，适当的渐近线非常小和非常大的昆虫，提出。这种关系只画上的RCS尺寸参数，它表明，将一个或两个RCS形状参数提供了一些额外的好处。小昆虫的偏振模式形状属于电磁散射理论所允许的参数值范围的相对有限的区域内。较大的昆虫具有延伸超出该区域的形状，随着尺寸和质量的增加，遵循宽的轨迹;在质量高于0.6 g时，图案变得“圆形”，当E场与体轴正交而不是平行于体轴时具有最大值。RCS形状可用于推断小昆虫的形态形式（
A data set of ventral-aspect insect radar cross-sections (RCSs) and polarization patterns, measured at X band (9.4 GHz, linear polarization) in laboratory rigs, has been collated from a number of sources. The data have been analysed to identify relationships between RCS parameters (one representing size and two the polarization-pattern shape) and the insects' masses and morphological dimensions and forms. An improved mass-estimation relationship, with appropriate asymptotes for very small and very large insects, is presented. This relationship draws only on the RCS size parameter and it is shown that incorporating one or both of the RCS shape parameters provides little additional benefit. Small insects have polarization-pattern shapes that fall within a relatively limited region of the range of parameter values allowed by electromagnetic scattering theory. Larger insects have shapes that extend beyond this region, following a broad trajectory as size and mass increases; at masses above similar to 0.6 g, the pattern becomes 'perpendicular', with maxima when the E-field is orthogonal to the body axis rather than parallel to it. RCS shape can be used to infer morphological form for small insects (