【电磁技术在线】【元件篇】- 2. 腔体滤波
讲师：Theunis Beukman
01：30 滤波器基础
04：00 什么是耦合矩阵
05：30 FD3D三维滤波器设计室
09：10 三维建模流程
11：10 优化方法
18：30 窄带滤波器
19：45 微带滤波器
22：00 三维双工器
23：15 敏感度分析
26：30 高效优化 demo
37：00 FD3D协同测试
38：30 自动建模 demo
46：50 自定义库
The idea with FD3D is that the user simply specifies some frequency response. Then the software produces a large range of coupled-resonator filter topologies that would realise the specific transfer function. This is very useful because it enables the engineer to realise high-performance filters in different technologies, ranging from RF to mm-Wave.
General steps to design your own cavity filter:
Step 1: Choosing the type of resonator is of course very dependent on the 3D technology and manufacturing process available.This choice is typically influenced by things such as the desired insertion loss, size constraints and perhaps also tunability.
Step2: Then the coupling mechanisms are configured that would produce the desired level of energy transfer.
Step 3: Then the eigenmodes are calculated for these different models. Note that specific result templates are available for extracting these values from the modal results. All these filter parameter values (freq,Qe,CBW) are directly calculated from the coupling matrix, and are given in the matrix report in FD3D.
Step 4: Finally everything is brought together to form the complete filter model.
The initial response is of course detuned, due to the loading of the different arts. Remember each part was designed in isolation and therefore detuned result is expected. There are many different techniques to tune up a filter but they can be very cumbersome, and depending on the filter topology or modal content, they might never get you to the optimal tuned state.
In this video, you will learn the complate and efficient 3D filter workflow, from design assembly, optimization strategy, to cooperation with measurement.
