关于添加工作在1Ghz左右频率的铜材料的问题

- March 13, 2023 at 7:02 am
  
  SXSi
  Subscriber
  
  老师您好！目前我们想进行一个工作频率在1Ghz左右的仿真，需要用到Cu材料，但材料库中的Cu貌似并不能直接用于该频段，我尝试添加conductive 3D，并将电导率设置为5.8*10^7，之后仿真所需内存就变得无比庞大（如下图），请问有什么其他办法可以在该工作频率下添加合适的Cu材料呢？
- March 13, 2023 at 9:53 pm
  
  Guilin Sun
  Ansys Employee
  
  因为对光学波段来说，1GHz属于长波，建议用PEC代替吧，目前我们FDTD不是像微波FDTD那样直接将电导率加到FDTD迭代方程里，而是用介电常数，导致内存需要很大。你的仿真应该不是为了要材料吸收或者SPP，因此用PEC应该没有问题。
  - March 17, 2023 at 8:45 am
    
    SXSi
    Subscriber
    
    老师您好！我需要对比同样结构用两种材料（Cu和坡莫合金）的情况下会有什么区别，所以不能直接用PEC，请问老师还有其他办法吗？
- March 17, 2023 at 5:00 pm
  
  Guilin Sun
  Ansys Employee
  
  那就只能使用Thin Sheet 2D材料，用电导率区分不同材料：
  https://optics.ansys.com/hc/en-us/articles/360034915113
  Radio frequency simulation methodology – Ansys Optics

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