导波

H面波导不连续性是导波场理论中的重要问题。

H-plane waveguide discontinuities is an important problem in the theory of guided waves .

管道导波无损检测频率选择与管材特征关系

Relationship between Frequency Selection and Pipe Characteristics for Guided Waves NDT

对称性对2D光子晶体异质结导波模的影响

The influence of photonic crystal heterostructures ' symmetric on guide modes

采用PZT传感器激励和接收超声导波

Excitation and Reception of Ultrasonic Guided Waves Using PZT Transducers

PVDF梳状传感器及在超声导波检测中的应用

PVDF Comb Transducer for Controlling Guided Wave Mode and Application in Inspection

ANSYS二次开发技术在弯管缺陷超声导波检测数值模拟中的应用

Application of Second Development based on ANSYS Software on Simulation of Detection Defect in Curved Pipes Using Ultrasonic Guided Waves

带形域内圆柱形夹杂对SH型导波的散射

Scattering of SH waves from a circular inclusion in an infinite strip region

非对称型Kerr类介质膜漏波导中的非线性导波

Nonlinear guided wave in asymmetric Kerr-type dielectric film leaky waveguide

采用分布式PZT传感器在管中激励和接收超声导波。

Using distributed PZT transducer , ultrasonic guided waves are generated and received in a pipe .

利用有限元法（FEM）对板状金属材料中脉冲激光激发的超声导波进行了理论研究。

A theoretical study on ultrasonic guide waves generated by a pulsed laser was presented , using the finite element method ( FEM ) .

理想介质中电磁导波特性的FDTD分析高压输电线塔锚杆腐蚀的电磁导波信号表征

Using FDTD to study the medium Magnetostrictive Guided Wave Characterization for Anchor Rod Corrosion of High-voltage Transmission Tower

对导波光学器件中常用的劈形、Y分支器、X交叉、定向耦合器作了详细的计算，并通过实验定性地加以证实。

Besides numerical calculation , guided-wave characteristics of several optical devices , such as taper , Y-branch . , X-crossed waveguide and directional coupler , are calculated in detail .

基于小波变换及Wigner-Ville变换方法的超声导波信号分析

Ultrasonic Guided Wave Signal Analysis Based on Wavelet and Wigner-Ville Transform Processing

并指出利用放电管的导波作用研制较大功率的基模CO2激光器是一条有希望的新途径。

It is pointed out that the development of higher power fundamental mode CO2 laser by means of the waveguide effect of the discharging tube is a new hopeful way .

用L（0,3）模式检测时，在2.0MHz·mm以下对管内外表面上的缺陷都较灵敏.轴向功率流分布能有效地选择检测的最佳导波模式及其频厚积。

Axial power flow distribution can be effective in choosing optimal guided wave and its frequency-thickness products of NDT .

F-K域三层对称模型洛夫型导波频散分析

F-K dispersion analysis of Love guided waves in three layered symmetry model

掺半导体玻璃（SDG）波导非线性饱和的导波测量方法

Guide wave measuring method of nonlinear saturation of semiconductor - - doped glass waveguide

应用静电场的观点和导波传输理论，用有限元法（FEM）分别计算了各种复杂截面同轴线特性阻抗、截止波长。

Based on the electrostatic field theory and transmission line theory , characteristic impedance and cut off wavelength of special section coaxial transmission lines are calculated using Finite Element Method ( FEM ) .

基于Z变换透射边界条件的统一理论，构成出一种新的能够适用于对称压缩顶点传输线矩阵法的吸收边界条件，并将它应用于导波问题的计算。

A new kind of absorbing boundary conditions based on the theory of generalized Z domain absorbing boundary conditions ( Z ABCs ) for the 3D TLM SCN method is presented .

基片集成波导（SIW）在结构上综合了上述两类导波结构的优点，使得其在提高性能的基础上，能够更容易地与各类元器件集成在一起。

The substrate integrated waveguide ( SIW ) borrow advantages of both kinds of guide-wave structure above .

采用PZT传感器在钢管中激励并接收超声导波，研究导波在管道中传播时的反射、透射现象。

PZT transducers have been used to excite and receive ultrasonic guided waves in steel pipes . The reflect and transmission rules of guided waves are researched .

基于表面增强拉曼散射技术（SERS），内壁修饰Ag纳米颗粒的中空导波管被用作分子检测的传感器。

A hollow core waveguide with silver nanoparticles coated on the inner wall has been used for molecular detection based on surface enhanced Raman scattering ( SERS ) .

研究表明，非线性TM波和TE波存在频率通带和禁带，带宽是导波功率的函数。

It is revealed that , both for TM and TE waves , there exist passbands and stopbands , which can be controlled by varying the power of the wave .

利用Gabor小波变换方法对断铅声发射信号进行时频分析，通过确定某一频率下某一模态导波到达传感器的时间，较好地实现了声发射源定位。

By use of Gabor wavelet transform and MAE technologies , the arrived time to sensors of transient AE signals of specific guided mode can be precisely obtained .

在上述波长下，波导的低偏振相关损耗（PDL）小于0.1dB/cm.因此，是制备可调热光器件的良好导波模快。

The low polarization dependence loss ( PDL ) of the waveguide was less than 0.1 dB / cm at above wavelengths , which can be applied in thermal-optical tuned devices .

最后，本文深入分析了纵向均匀金属EBG波导的模式问题，研究了波导中主要导波模的模场分布和基本特性，以及波导中心缺陷尺寸及波导壁层数对模场分布的影响。

Finally , the FDTD method is used to solve the mode problem of metallic EBG waveguide . The effects of defect size and thickness of waveguide are studied numerically .

同时计算了振子强度，并求得了极性介质平面波导导波Polariton的色散关系。

Furthermore , the intensity of oscillators is calculated and the dispersion relation , of the polaritons in a dielectric planar waveguide is worked out .

本文描述了非线性导波周期结构的基本概念和制备方法，并在InSb和掺半导体玻璃波导上制备出了光栅耦合器，观测到了非线性耦合效应，讨论了它们的实用化前景。

Fundamental concept and fabricating method of nonlinear gnided-wave periodic structure are described in this paper . Grating couplers are made on InSb and semiconductor doped glass waveguide . Nonlinear coupling effects are observed experimentally .

在理论分析基础上，应用超声导波检测仪对管道缺陷进行检测实验，以轴对称纵向L（0,2）模态和扭转T（0,1）模态导波进行检测，实验结果与理论分析基本吻合。

On the basis of theoretical analysis , pipeline defects detection experiments using guided wave testing instrument was done , and the results are greatly agreed with the theoretical analysis .

多个单音频叠加信号经HANNING窗调制窄带激励，既可以提高信号强度，又可以增加导波的传播距离。

The narrowband excitation signals , which increase the signal strength and the propagation distance of guided waves , can be made by the plurality of single tone superimposed signals modulated by HANNING window .