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Port or Lumped Port With Matched Impedance
Posted 28 nov 2016, 09:59 GMT-5 Low-Frequency Electromagnetics, RF & Microwave Engineering, Heat Transfer & Phase Change, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 5.2 2 Replies
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Hi,
I am currently working on an RF Module/Heat Transfer multiphysics model. Basically, I want to simulate a system with a port/lumped port for which the impedance is matched to my system's impedance, but there doesn't seem to be a way to do it systematically on Comsol. Is there anyway to set up a port/lumped port such that there is no reflection at the port (hence no standing waves due to reflection)?
Thanks!
I am currently working on an RF Module/Heat Transfer multiphysics model. Basically, I want to simulate a system with a port/lumped port for which the impedance is matched to my system's impedance, but there doesn't seem to be a way to do it systematically on Comsol. Is there anyway to set up a port/lumped port such that there is no reflection at the port (hence no standing waves due to reflection)?
Thanks!
2 Replies Last Post 29 nov 2016, 09:26 GMT-5
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Posted:
8 years ago
Construct PML ( Perfectly matched layer ) boundary around your geometry.
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Posted:
8 years ago
Hi Deepshikha,
Thanks for the suggestion! I have thought about that as well, but there are two things that bother me with it:
- PML makes sure there is no reflection at my model's boundaries, but not necessarily specifically at my port and between the port and its load
- PML ensures absorption of the input power by the {Load + PML} system, but that doesn't fix the amount of power that actually ends up in my load.
To give you more context, I am trying to simulate the behavior of my setup in the frequency domain, for a fixed amount of power ending up in the load, independently of frequency. In the lab, we have specific matching networks that allow us to make sure the net power consumed by our load is fixed - I am trying to replicate that with the simulation.
Please let me know if that makes sense and if you have any suggestions.
Thanks again!
Thanks for the suggestion! I have thought about that as well, but there are two things that bother me with it:
- PML makes sure there is no reflection at my model's boundaries, but not necessarily specifically at my port and between the port and its load
- PML ensures absorption of the input power by the {Load + PML} system, but that doesn't fix the amount of power that actually ends up in my load.
To give you more context, I am trying to simulate the behavior of my setup in the frequency domain, for a fixed amount of power ending up in the load, independently of frequency. In the lab, we have specific matching networks that allow us to make sure the net power consumed by our load is fixed - I am trying to replicate that with the simulation.
Please let me know if that makes sense and if you have any suggestions.
Thanks again!