导波器

This paper presents two kinds of optical controlled attenuator and phaser used in millimeter-wave band.

本文介绍了两种光控介质波导衰减器和移相器。

The system is assumed to be free of any losses and the fields of separated regions in circulator cavity are expanded by means of mode-matching method.

没有磁偏场作用时，我们提出一种行之有效的在给定频率下设计H面波导环行器中部份高度铁氧体性的新方法。

A Study of Design,Fabrication and Performance of Cone-shaped Wave Guide Coupler for CO2 Laser Delivery

摘 要：针对CO2激光传输用空芯波导的特点，设计、制备了锥形空芯波导耦合器系统。

The fabrication process of a compact planar waveguide etched-grating demultiplexer based on silicon-on-insulator is studied.

研究了基于绝缘材料上的硅材料的平面波导刻蚀光栅分波器的主要制作工艺。

After a description of the basic principle of vertical ultrasonic guided wave, this paper has made an analysis on the variation of the displacement offset of vertical mode variant with frequency; it has also presented an approach by which a pectinate symmetrical transducer be used to effectively detect pipeline flaws.

在纵向超声导波基本原理的基础上，分析了两种纵向模式位移分量随频率的变化而变化的情况，给出了一种梳状对称换能器对管道缺陷的有效检测。

Based on the theory of heat conduction, the heater thermal field was calculated to determine the most efficient position of heater. And the parameters of heater and asymmetric Y branch were decided using FD-BPM method. After the design and optimization, the polarization dependence and wavelength dependence of the attenuator were researched.

先根据前文介绍的热传导理论模拟了用于可调衰减器的电极的热场分布，设计了电极的最优位置，然后利用马卡蒂里近似解法求解掩埋条形波导的单模条件，并计算了波导的宽度和厚度，设计了非对称Y分支型的光衰减器的Y分支结构，电极参数，完成整个设计过程，最后，模拟了光衰减器的偏振相关性和波长相关性，从而也得到了一个聚合物可调光衰减器的设计优化方法。

Narrow wall and broad wall apperture coupler. Experiments have been made to test them. Other types of discontinuity we have studied include: coax and SIW transformer; SIWs\' coupling on different layers; branch coupler based on SIW; post inside SIW; the H-plane discontinuity ; bend structures; cross structures; \'Y\' branch of SIW etc.

本文所研究的其它不连续性结构还包括：同轴波导与SIW的转换接头；不同层间SIW的转换；基于SIW的分支定向耦合器；基片集成波导中的感性金属杆；基片集成波导的H面不连续性结构；各类拐角结构；波导交叉结构；波导'Y'分支结构。

Consideration is attended to the working conditions of chopper with reverse conducting thyristors.

着重分析了逆导斩波器的工作条件，提出了减轻换流和动态工作条件的具体措施。

And the Finance Chair of PIERS 1997, Hong Kong. His research interests include RFID tag antennas, dielectric resonator antennas, microstrip antennas, wire antennas, guided wave theory, computational electromagnetics, and mobile communications.

他的研究领域包括无线射频设别天线、介质谐振器天线、微带天线、线天线、导波理论、计算电磁学以及移动通信等。

Four-port network with partial height cylindrical objects in rectangular waveguide junctions (i.e., Four-port rectangular junctions), multiple-stepped rectangular waveguide bend and T-septum rectangular waveguide junction are modeled by full-wave mode matching method in order to quickly design the combline cross-coupled filter, corner waveguide diplexer, generalized chebysheve waveguide filters and diplexers with high efficiency in this paper.

本文将它运用于矩形波导接头中带通用圆柱杆的四口网络、多阶梯矩形波导弯头和T—septum矩形波导接头的全波建模，有助于快速高效设计梳状广义切比雪夫滤波器、拐弯波导双工器、广义切比雪夫波导滤波器和双工器。

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。