散射参数

基于TDR的散射参数提取及误差分析

Extraction of S-parameter and Error Analysis Based on TDR Measurement

利用模式匹配的基本思想，结合复功率守恒法，考虑膜片厚度，推导出了矩形波导感性膜片不连续性的广义散射参数矩阵公式。

The generalized S-parameter matrices of rectangular inductive irises are calculated based on a rigorous mixed method of the Mode Matching Method and the Conservation of the Complex Power Technique ( CCPT ) .

N阶有源滤波器的散射参数综合法

The Synthesizing Method of N-order Active Filter Using

微波相关器散射参数推导与MATLAB仿真

Deriving the Scattering Parameters of Microwave Correlator and MATLAB Simulation

从得到的散射参数中提取出有效电感、Q值和自谐振频率。

The effective inductor , Q-factor and the self - resonant frequency are extracted from S-parameters .

计算复杂系统的散射参数，会出现矩阵不满秩，这在CAD中导致计算的中断。

In calculating the scatter parameter of the complex system , there may be matrix of unfilled rank which results in interruption of the CAD process .

对于DCM患者，进行背向散射参数分析时，不宜将左室血液作为标化物。

Blood in LV is not a suitable calibration reference in integrated backscatter analysis for patients with DCM .

结论DCM儿童心腔血液背向散射参数与正常儿童存在差异。

Conclusion There is significant difference in IBS parameters of blood between children with DCM and normal children .

最后基于新的空时联合相关函数，分析了非均匀散射参数以及Rice分布参数变化对MIMO信道统计容量的影响。

Furthermore , the impact of nonuniform angle spread and Rice distribution were analyzed on the ergodic capacity of MIMO fading channel based on the the new space-time correlation function .

而要通过FFT获得准确的频域散射参数，又必须得到完整的时域波形数据。

Data of complete time domain waveform is also needed in order to calculate accurate S-parameters of frequency domain via fast Fourier transform ( FFT ) .

目的描述扩张型心肌病（DCM）患儿的心腔血液超声背向散射参数的特点。

Objective To describe the characteristics of ultrasonic integrated backscatter ( IBS ) of cardiac blood in children with dilated cardiomyopathy ( DCM ) .

这一方法无需负载及FET的数学模型，只需知道其实频参数（阻抗或散射参数）即可。

In this method the mathematical models of FET 's and load are unnecessary , only the real frequency datum of impedances or scattering parameters are required .

然后，利用自己编制的一系列MATLAB程序，计算分析了几种矩形波导内部的不连续结构，获得了这些结构主模工作时等效双端口网络的散射参数。

Then , the computer programs for some discontinuous structures of the rectangular waveguide are developed using MATLAB . So , the S-parameters of the equivalent two-port networks of these discontinuous structures are obtained under the condition of main mode operation .

提出一种基于商业软件HFSS仿真得到的开缝波导散射参数来提取辐射缝隙自导纳和有源导纳的方法。

A method of extracting waveguide slot admittance based on the simulation results obtained ( using ) the commercial software HFSS is presented in this paper .

采用模匹配法精确计算了矩形波导E面直角弯头的散射参数，这对于在拐角匹配和波束形成网络等方面的应用很重要。

The mode match method is presented for the rigorous calculation of the scattering matrix of E-plane right angle junction for rectangular waveguides in this paper . This is important in some applications such as the corner matching problem and the beam forming networks .

讨论了用散射参数表达的串联阻抗Z和并联导纳Y的二端口特性，给出了它们的有源RC电路模型。

In this paper , the scattering parameter expression of two port properties of impedance 2 ( in series connection ) and admittance Y ( in parallel connection ) is discussed , and their active RC model is presented .

然后，在8mm频段对几种加金属块匹配的T结波导环行器结构进行了分析，并给出散射参数性能曲线。

Then , analysis of several other T-junction waveguide circulators with metal matching block in 8 mm frequency band is presented . And the scattering parameters are obtained .

文中用零阶和二阶Legendre多项式的展开式来近似表示由于冰粒子水平取向所引起的散射参数随入射角的变化。

The dependence of the scattering parameters on the incident angle caused by horizontal orientation of ice crystals is approximated by the Legendre polynomial expansion of zero and second order .

本文用边界元法分析了H面波导的不连续性，计算了H面T结和H面弯波导的散射参数，并与文献报道的结果比较，两者吻合。

Boundary element method has been used to analysis the H-plane waveguide discontinuities in this paper . The H-plane T-junction , circular waveguide bend with arbitrary length of radius can be calculated with this method . Numerical results agree well with the experimental results and numerical results in other literature .

非均匀传输线上信号的传播速度沿线可以变化，TDR响应无须分解为入射波和反射波，使得本文方法比传统的利用散射参数的综合方法更加简单、有效。

The TDR response is not split into incident and reflective waves , which makes the synthesis method in this paper more simple and efficient than the traditional synthesis methods based on the scattering parameter theory .

通过FDTD和传播矩阵法分别计算了矩形波导中和自由空间中介质散射参数，利用数值模拟的方法提取介质参数，分析了NRW方法提取介质参数时所出现的谐振问题。

Using FDTD and transmitting matrix algorithm , the scattering parameters of medium in rectangle wave-guide and free space are computed , and electromagnetic parameters are extracted . The resonance problem in NRW is analysed .

目的：观察在急性前间壁心肌梗死中梗死区心肌超声背向散射参数变化，并研究其与单光子发射型计算机断层扫描（SPECT）所测相应心肌节段灌注缺损值的关系。

Objective : To observe the changes of ultrasonic integrated backscatter parameters in infarct myocardium , and study the relationship between the change in integrated backscatter and the myocardial perfusion defects of relative myocardial segments examined by single photon emission computed tomography ( SPECT ) .

另外，本文还研究了FDTD分析微波电路时散射参数的两种提取方法，着重研究了端接匹配负载提取散射参数的方法，并对微带线端接匹配负载模型作了进一步的研究。

In addition , two methods for extracting the scattering parameters of microwave circuits are studied in this paper , with the emphasis on the matched load termination method . And a further research of the FDTD modeling of matched load terminating a microstrip line is made .

首先本文回顾了时域有限差分Yee算法，包括时域有限差分的差分方程、稳定性条件、数值色散特性、吸收边界条件，激励源的设置以及散射参数的计算等。

First , we reviewed the finite-difference time-domain Yee 's method . The difference equations , the stability condition , numerical dispersion characteristics , absorbing boundary conditions , incident wave source conditions and the calculation of the frequency-dependent scattering parameters are discussed .

应用子域连接技术，配合PML技术、连接边界法和非正交网格技术等，以波导双T、混合接头环耦合器等波导元件为例，得出这些器件的散射参数。

The subregion connection method , the PML techniques , the connecting boundary method and the non-orthogonal grid techniques are used in working out the scattering parameters of complex waveguide components . A magic T , a hybrid ring coupler and an E-plane waveguide junction are taken as numerical examples .

无源对称五端口网络散射参数幅值和相角的分析

Analysis of the S Parameters of the Passive Symmetrical Five Ports

线性对称网络散射参数测量的回归方法

Regression method for measurement of scattering parameters of linear symmetrical network

无耗二端口网络S散射参数测量的计算机最优解

Computer-aided optimum solution for scattering parameter measurements of two-port lossless network

使用散射参数综合电流模式有源滤波器

Synthesizing of N-Order current mode active filter by using scattering parameters

多巴酚丁胺负荷对不同程度缺血心肌超声背向散射参数的影响

Effect of Dobutamine Stress on Backscatter Integration Parameters of Ischemic Myocardium