CST的离散端口计算S参数，每次修改端口阻抗，都需要重新计算，但是事实上输入阻抗是不变的，所以可以从CST中导出输入阻抗，在matlab中计算不同端口阻抗的S参数。(The discrete port of CST calculates the S parameters, and each time the port impedance is modified, it needs to be recalculated. But in fact, the input impedance is co