高次模式 meaning in English

higher modes

Considering the influence of high evanescent modes , we have obtained the common theory . by the comparing between theoretical calculation and experimental data , we found the theory can accurately describe the high - frequency characteristic of this kind of slow - wave helical groove structure . then , five representative shapes are chosen and researched particularly ( triangle shape , cosine shape , trapezoid shape , rectangular shape and swallow - tailed shape )
主要工作成果和创新之处在于: 1 .通过考虑高次模式的影响,获得了一种更为精确分析任意槽形螺旋槽结构的普遍理论,经与实验测量值比较,发现它更能准确可靠地描述此类螺旋慢波结构的高频特性,然后详细研究了五种槽形状(三角形槽、余弦形槽、梯形槽、矩形槽和燕尾形槽)对螺旋槽慢波系统导波特性的影响。
The electromagnetic field and energy distribution of gaussian beam existing in quasi - optical resonator are analyzed and simulated using matlab , the resonant frequency and waist radius of the resonator are calculated , and design the 3mm quasi - optical resonator according to resonant frequency and waist radius
本文首先分析了准光腔内存在的高斯波束电场和能量分布情况,模拟了工作模式tem _ ( 00q )和高次模式的电场和能量分布图,计算准光腔的谐振频率和束腰半径,以此为依据设计了3mm准光学谐振腔。