端口错误提示
发现设置时只要将端口2中的orientation"negative" 改为"positive",计算就可以正常进行而且结果和文献很接近.但这似乎不妥,因为端口1已经设置为orientation"positive"了.只有两个端口,1为"positive",2就因该"negative" .错误的设置为什么能正常进行还得到满意的结果了呢?
不是很理解错误提示的含义,第一句似乎端口2纵向要加密网格,加了，还有错误提示.
第二句怎么解释呢?
如何正确操作,才不出现错误提示呢?
把端口的尺寸径向加大试一下
最初的设置是正确的，即orientation"negative" 改为"positive"。
只有同时激励时才会顶牛
你不会同时激励这两个端口吧，再想一下S参量的概念就明白了，如果理解不了，你可以去掉端口2，那能量馈进去，另一头你别管，仿真一下试试，两者结果应该差不多，这样总理解了吧?
另外CST中波导端口模拟的是一个连在结构上无限长的波导，如果你设置成"negative" ....那这“无限长的波导怎么放”?
谢谢，明白一些了。
但我要得到S21，S11，总要设两个端口吧。设两个端口，就要碰到ORIENTATION的问题。
1，2端口的激励不是同时激励的～～
帮助里是这样解释的:
Orientation: Please define here the orientation of the port, i.e., the direction of radiation. A lower port radiates in the positive direction and an upper port radiates in the negative direction, related to the selected port's normal coordinate axis. Usually the choice corresponds to the definition at the lower or upper boundaries of the calculation domain. However, it is also possible to define internal ports inside the calculation domain.
Note: When defining a new port, or when selecting an old one, the local coordinate system of the port, which is determined by the orientation of the global coordinate system, is displayed in the main view. In addition, an arrow indicates the chosen radiation direction if the port is excited.
这样从Note看来,设置的时候应该保证端口面上的红色箭头都要指向模型内部.这是偶尔会出现两端口的orientation都要设置为negative或positive才行.这又似乎和前一段对orientation的定义矛盾了.
"A lower port radiates in the positive direction and an upper port radiates in the negative direction, related to the selected port's normal coordinate axis. Usually the choice corresponds to the definition at the lower or upper boundaries of the calculation domain......"怎样理解呢?