ID 原文 译文
12554 然后，利用线性朗缪尔波的色散关系反演得到电子密度。 Then, the electron density is estimated by the enhanced plasma lines with linear Langmuir wave dispersion relation.
12555 最后通过对等离子体谱线的反演进行误差分析，并与传统的离子谱线分析方法作对比。 By analyzing the standard error of enhanced plasma linesextraction and comparing to the electron density obtained from the traditional ion lines analysis.
12556 结果表明：增强的等离子体谱线具有更高的电离层电子密度估计精度；同时证明在非相干积累时间很短的情况下，利用等离子体谱线能够反演得到高精度的电子密度。 It is manifested that enhanced plasma lines are more promising for accurate ionospheric electron density estimation. Meanwhile, even withshort integration periods, the plasma lines can derive electron density with high resolution.
12557 提出了一种基于缝隙耦合超材料表面的低剖面圆极化高增益天线，该天线由一个超材料表面和一个微带缝隙天线紧贴着组成。 In this paper, a low profile high gain circularly polarized antenna based on aperture coupledmetasurface is proposed. The antenna consists of a metasurface and a microstrip slot antenna, which are clinging to eachother.
12558 通过改变超表面切角的大小来产生圆极化波，同时还可以提高天线增益和拓宽阻抗带宽。 Circular polarization waves can be generated by changing the size of the metasurface cut angle, while improvingthe antenna gain and widening the impedance bandwidth.
12559 为了验证仿真结果，制作和测量了一个大小为 1λ×1λ×0.067λ(在 10 GHz 处) 的样本天线，仿真和测量结果显示出良好的一致性。 In order to verify the simulation results, a sample antennawith a size of 1λ×1λ×0.067λ (at 10 GHz) was fabricated and measured. The simulation and measurement results showgood consistency.
12560 结果表明，在整个工作带宽内天线的增益均在 7.5 dB 以上，最大增益达到 10.5 dB，比普通缝隙天线提高了 5.3 dB，阻抗带宽 (S11 < −10 dB) 为 27.4%，轴比带宽 (AR < 3 dB) 达到 12.3%。 The results show that the gain of the antenna is above 7.5 dB and the maximum gain is 10.5 dB overthe entire working bandwidth, which is 5.3 dB higher than the ordinary slot antenna, the −10 dB impedance bandwidthand 3 dB axial ratio bandwidth can reach 27.4% and 12.3%, respectively.
12561 因此，该天线能同时满足低剖面、圆极化、高增益等多种性能的要求，可以应用于许多领域。 Therefore, the antenna can meet therequirements of low profile, circular polarization and high gain, and can be used in many fields.
12562 文中基于 Daubechies 紧支撑尺度函数的辛时域多分辨率 (symplectic multiresolution time-domain, SMRTD) 算法，在时间方向上采用优化的 3 级 3 阶的辛算子进行离散，以减少时间步的迭代次数，在空间方向上采用小波尺度函数展开算法进行离散。 In this paper, the symplectic multiresolution time domain method (S-MRTD) based on compactly supported scaling function is studied. In order to reduce the number of iterations in time steps, the optimized 3-stage 3-order symplectic integrator propagator is used to discretize in the temporal direction, and in the spatial direction, thetime domain multi-resolution method with good dispersion characteristics is used to discretize.
12563 给出了 S-MRTD 算法的三维迭代公式，并将其应用到波导结构相关特征参数的数值计算和分析中。 In this paper, the three dimensional iterative formula of symplectic time domain multi-resolution scheme is given, which is applied to analysis ofthe characteristic parameters of waveguide structures.