波导

Effects of a single scatterer on the transport properties of a leaky electron waveguide are studied theoretically.

本文用一双波导模型模拟漏波导，用δ函数模拟散射势，从理论上研究了单个散射杂质对漏波导传输特性的影响。

In addition, the nonlinear processes such as cross-phase modulation, non-degenerate two-photon absorption, and stimulated Raman scattering must also be considered for double wavelengths propagating in waveguide.

在归纳分析了SOI对光信号处理的研究进展的基础上，进一步完善了超快脉冲在脊形硅波导中演变时所满足的线性和非线性传输方程，在此非线性方程中包括波导线性损耗、群速度色散和三阶色散等线性效应；同时也包含了自相位调制、简并双光子吸收、自由载流子吸收和自由载流子色散等非线性过程；当双光场在波导中传输时，脉冲之间的交叉相位调制、非简并双光子吸收和受激拉曼散射效应等非线性效应也被考虑。

Compared with other wave-guide material, glass is not so good on the thermal conduction, and its transmission loss is bigger, but it is easy for processing, especially the wave-guide surface can have much higher degree of finish.

虽然玻璃较其它波导材料导热性能较差、传输损耗较大，但由于易加工，尤其是波导面可达到很高的光洁度，且价格低廉，因此硬质玻璃波导CO_2激光器仍具有很高的实用价值。

Beam waveguide feed system,composed of a series of flat reflectors,conicoid mirrors and lens can use conicoid mirror and flat mirror as rotating joint to implement mechanical scan of antenna in electromagnetic wave transmission.

通过对波束波导馈电卡塞格仑天线工作原理的分析，论述了波束波导在高功率微波辐射天线中的应用及设计方法，重点介绍了一套利用波束波导馈电高功率微波辐射天线。

The spectrum of cut-off frequencies is discussed in electromagnetical symplectic system. The wave number k is given and the cut-off frequencies are computed.

在电磁波导辛体系内讨论波导的通过谱，给出一定的波数并建立相应的变分原理，得出本征值方程并计算了波导的截止频率。

The performance of PML is investigated using FDTD modeling of the propagation of sinusoidally modulated Gaussian pulse in a rectangular waveguide.

首先通过模拟正弦调制的高斯脉冲在波导中的传输来验证 PML 的吸收性能，然后将采用 PML 吸收边界的 FDTD法应用于矩形波导填充有限媒质时的 S参数和圆形波导中矩形薄膜片反射系数的计算。

Emphasis is placed on a practical HPM radiating antenna fed by beam waveguide.

通过对波束波导馈电卡塞格仑天线工作原理的分析，论述了波束波导在高功率微波辐射天线中的应用及设计方法，重点介绍了一套利用波束波导馈电高功率微波辐射天线。

The general 2-D FDFD equations in the Cartesian coordinate system and difference equations for the trapezoidal bevel edge of the waveguide are presented. Transmission characteristics of single and double trapezoidal-ridge waveguides are then analyzed using these equations.

采用直角坐标系中2-D FDFD的一般分析公式和波导梯形斜边上的差分公式，对梯形单脊矩形波导和梯形双脊矩形波导的传播特性进行了分析。

The parameters include waveguide width: 8μm, titanium film thickness:50~60nm, index change: 0.006, diffusion temperature: 1050 and diffusion time: 9~10 hours.Designed and produced a 2 X 2 coupler Optical switch and a 1 X 2 digital optical switch. The coupler optical switch was produced by AP reversal structure, with the main parameters such as total length of switch: 30mm, waveguides center distance: Hum, interaction length: 17mm, and at 17V with a crosstalk of -18dB. The digital optical switch was produced by asymmetry electrode Y branch structure. The main parameters of this switch such as switch length: 25mm, the angle of Y branch: 0=0.1? center distance at branch end: 30μm, the center distance of electrons: 12μm, and at 27V with a crosstalk of 18dB.

设计并制作了2×2耦合型光开关和1×2数字开关，其中耦合型开关主要采用的反转Δβ定向耦合器开关，开关长度约30mm，波导宽度8μm，波导间距14μm，耦合区长度17mm，电极主要采用三电极结构，最终测得对TE模开关电压＜-15，消光比≈18dB；数字开关采用非对称电极Y分叉数子开关结构，利用BPM软件模拟了其开关特性并优化了器件参数，制作中采用的主要参数为：开关长度约25mm，Y分叉角θ=0.1°，Y分叉末端波导间距30μm，电极间距12μm，最终测得开关电压27V，消光比≈18dB。

Under the background of High Power Microwave technology, a novel family of waveguides for high power microwave transmission is proposed. Some other new types of guided wave structures formed by some classical geometrical curves are also explored in this dissertation.

在高功率微波技术日益得到重视的背景下，本文提出了一种新的大功率导波结构——五边形波导族，并对利用经典几何曲线构成的几种导波结构作了探索。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。