Return Loss(dB)=10*LOG10(Reflected Power/Incident Power) 16、Scattering Parameters(散射参数):Better known as S-Parameters,these 4 values help define the performance of several variables at various frequencies.
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... 参数 parameter 散射参数 parameter of scattering 群聚参数 parameter， bunching ...
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背散射参数成像 Backscatter parametric imaging
The measuring results show that scattering parameter method has higher precision, and can eliminate the effects of reflection and noise.
提出了测量变压器绕组传输特性的散射参数测量法,与脉冲响应测量法的测量结果比较表明,散射参数测量法具有测量精度高、抗干扰能力强等优点。
参考来源 - 电力变压器局部放电的电气定位及诊断Data of complete time domain waveform is also needed in order to calculate accurate S-parameters of frequency domain via fast Fourier transform (FFT).
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。
参考来源 - FDTD时域波形外推预测和ADISo, the S-parameters of the equivalent two-port networks of these discontinuous structures are obtained under the condition of main mode operation. Finally, the basic principle of longitudinal slots in waveguides is studied.
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。
参考来源 - 时域有限差分法在波导结构电磁场特性分析中的应用·2,447,543篇论文数据，部分数据来源于NoteExpress
分别测量其左室后壁及室间隔的背向散射参数。
Ultrasonic backscatter parameters in left ventricular posterior wall and interventricular septum were measured.
最后由等效磁流源导出了矩形波导t形结的散射参数。
At last the scattering parameters of the T-junction can be derived.
结论：心肌背向散射参数可以用于评估高血压患者心肌肥厚的不同程度。
Conclusions: Ultrasonic integrated backscatter parameters may be used to evaluate to the degree of myocardial hypertrophy in the patients with hypertension.
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