ID 原文 译文
13494 对于该模型,地下分层结构中的分界面设置为粗糙界面,采用电磁微分高斯脉冲作为GPR源,并用单轴完全匹配层介质对计算区域边界进行截断以模拟无界区域。 For the model, the interface in the underground layered structure is set to a rough interface, a nd the electromagnetic differential Gauss pulse is used as the GPR source. To simulate the unbounded scattered field existing in an infinite free space, the computing region is truncated by using the uniaxial perfectly matched layer medium.
13495 通过数值计算得到了探地雷达B-scan扫描的回波仿真结果,并讨论了埋藏深度、几何形状、介电常数、电导率等对回波散射特性的影响,以及目标受其上方不同粗糙度的粗糙界面影响而产生的回波形态的改变。 The simulation results of GPR B-scan echo are obtained by numerical calculation, the effects of target depth, geometry shape, permittivity and conductivity on the scattering characteristics are discussed, and the change of target echo shape produced by the influence of rough surface with different roughness on the target is analyzed.
13496 该结果中显示的各个回波的形态、方位、振幅强弱以及到达的时间均与模型中各个结构的外形、位置、媒质特性及埋藏深度相一致,验证了该计算模型的有效性。 The results show that the shape, orientation, amplitude strength and arrGal time of each echo are consstent with the shape, location, medium characteristics and buried depth of each structure in the model, which verifies the validity of the calculat i on model.
13497 针对电大尺寸飞行器表面周期性布阵阵列天线的雷达散射截面(radar cross section, RCS)计算,文中在分析已有电磁数值计算方法的基础上,将矩量法与信号处理中的Fourier级数拟合有机结合,通过子阵外推得到了一种二维面阵RCS的快速计算方法。 Based on the analysis of the existing electromagnetic numerical calculation method, a fast radar cross section(RCS) calculation method is designed for two-dimensional planar array through extrapolation of sub-array, which combines the moment method and the Fourier series fitting in signal processing.
13498 并将该方法与传统电磁商用软件FEKO的效率进行对比,效率提高了将近25倍,验证了算法的高效性与正确性。 This new method can be used for the RCS calculation of the periodic arrays covered electrically large aircraft. The efficiency of the algorithmhasincreased by nearly 25 times, compared with the efficiency of the traditional electromagnetic business software FEKO, and then the efficiency and correctness of the algorithm are verified.
13499 通过进一步的二维面阵暗室实测与仿真数据对比,RCS曲线主瓣与周围副瓣基本贴合,验证了算法的可行性。 By comparing the measured data with the simulation data, the main lobe and surrounding sidelobe of the RCS curve are basically bonded, and then the feasibility of the algorithm is verified.
13500 提出并设计了一种基于非对称开口圆环形结构的极化转换单元,并以此为基础设计实现了超宽带雷达散射截面(radar cross-section, RCS)缩减电磁超表面。 In this paper, a polarization conversion unit based on an asymmetric split ring structure is proposed and designed. Based on this design, an ultra-wideband RCS reduction electromagnetic metasurface is realized.
13501 利用非对称开口圆环形结构极化转换单元可灵活设计转极化反射相位的特点,设计了两种极化转换单元以实现在超宽频带范围内满足反射相位相差接近180°,将这两种单元在平面上进行编码优化排布,使得入射电磁波产生漫反射效应从而实现超宽带后向散射RCS缩减。 The asymmetric split ring structure polarization conversion unit can flexibly control the polarization reflection phase. Two polarization conversion units are designed to achieve the reflection phase difference of nearly 180° in the ultra-wideband range. The unit is optimally coded on the plane to make the incident electromagnetic wave produce a diffuse reflection effect to achieve ultra-wideband backscatter RCS reduction.
13502 最后设计并加工了一个192 mm×192 mm尺寸的电磁超表面,仿真和实测结果表明该表面在11.2～24.1 GHz的宽频带内实现了10 dB以上的RCS缩减,最大缩减可达35 dB。 Finally, an electromagnetic metasurface of 192 mm×192 mm size is designed and fabricated. The simulation and measured results show that the surface achieves RCS reduction of more than 10 dB in the wide frequency band of 11.2—24.1 GHz, and the maximum reduction is up to 35 dB.
13503 导电聚合物材料聚(3,4-乙撑二氧噻吩):聚(4-苯乙烯磺酸盐)(PEDOT:PSS)是一种在太赫兹波段很有潜力的多功能材料,PEDOT:PSS薄膜的介电性能可以通过掺杂有机溶剂二甲基亚砜(DMSO)来改变。 Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate)(PEDOT:PSS) is a promising candidate for terahertz(THz) devices. Its dielectric properties can be changed by the dopant dimethylsulfoxide(DMSO).