single freq. vs. broadband analysis in hfss

- February 18, 2019 at 8:33 pm
  
  omiduga
  Subscriber
  
  Which one is more accurate in the HFSS for resonator: single freq. or broadband adaptive meshing?
- February 21, 2019 at 3:53 pm
  
  3Asif
  Subscriber
  
  Hi Omiduga,
  
  If properly set, there can be more than one method that can yield you the correct answer. Let me provide you a generic suggestion:
  
  You need to set the solution frequency (i.e. the frequency of meshing) where there is high amount of power involved. For example, if you are simulating bandpass a filter of 5GHz, and decide to mesh at 15GHz (Solution Freq), then there is a chance of getting improper mesh. Reason? At 15GHz, there is a very little power through that filter and the meshing operation (which focuses on power difference between passes) will see very small change (delta S), and stop meshing -this is unwanted. Usually, for a frequency selective cases, it is suggested to mesh at that frequency of interest.
  
  On the other hand, you have broad band, that tries to mesh ‘intelligently’ over the range.
  
  In broadband, it will mesh for different situations, and should still give you correct mesh at the targeted frequency. For example, in the 5GHz filter, I can still do broadband and get proper meshing. However, there will be unnecessary meshing activities at 10GHz, 15GHz …., etc.
  
  You can do a simple trial by running two copies of the same project with both options. If pressed for time, I would have selected the single frequency (assuming that I know the ball park value of resonant freq)