【电磁技术在线】【EDA篇】- 4. 连接器

讲师：Milan PR'IHODA

00：00 什么是连接器

02：45 test fixture 夹具（PCB，启动器等）

05：40 S21dd 参数

07：30 S11dd 参数

09：15 S11dc (LCL) 参数 (S12dc是LCTL )

13：30 夹具设计技巧

13：45 技巧1：传输线部分 (精确同轴，重复性，匹配）

14：50 技巧2：共模数据 (仿真）

16：00 技巧3：对称模型 (via，网格）

19：35 技巧4：夹具最小化 （参考面，TRL）

26：10 技巧5：测量数据提取三维模型

Connectors are integral part of any transmission system. They allow to interconnect systems orcircuits via cables, but what is important – they represents a discontinuity. And effects of the discontinuity grow with frequency, which means that reflections, Differential to common mode conversion and radiation are always there. Therefore the precise connector characterization is required. 

In this video, you will learn what causes the discrepency between simulation results and measurement results, particularly for multipin connectors.

When compare the simulation with measurement, the effects of the test fixture cannot be ignored. The test fixture for connector measurement has a significant impact on the all measured parameters of the connector. Test fixtures are mandatory for VNA Measurement, and they are often assumed as ideal and ignored.

Recommendations for the Fixture Design:

• Precision launchers should be used(Matching,Repeatbility)

• Fixture must be symmetrical (LCL!, LCTL!)

• Reference planes should be as close aspossible to the connector itself (RL,IL)

• Do not forget Common Mode

• Fixture must be well defined and characterized (3DModel Extraction)

CST STUDIO SUITE is an excellent tool for all the stages of proposed workflow:

• Connector design including yield analysis

• Fixture design

• 3D model extraction from the measured data

• Prediction of connector performance in real environment