Learning Forum

[Prateekee Chatterjee]

I want to simulate something similar to a ferrite bead (say). 

How do I get the impedance Vs Freq sweep? I tried the Eddy current solver - I don't know if there is anything in the set up but the Z value seems to be going down with frequency (right from 100 Hz to 1Mhz) which does not make sense. 

Also does the eddy current results report "Z"/"Znom" consider the capacitance in the system and then give the overall Z?

I do not think HFSS is suited for this since that deals mainly with transmission lines (although I am more than underaware of this)

 

 

[Aymen Mzoughi]

To simulate something similar to a ferrite bead and obtain an impedance vs. frequency sweep, you might want to consider using Ansys HFSS, which is capable of modeling and analyzing saturated Ferrite based microwave devices such as isolators. The HFSS Microwave Isolator course demonstrates Ansys capabilities for modeling and analyzing these types of devices using Ansys HFSS and Ansys Maxwell. This course includes modules that show workflows from start to finish, including topics such as resonance isolator with uniform magnetic bias, Ferrite material definition by importing non-linear BH curve, and resonance isolator with non-uniform magnetic bias from Maxwell magneto static setup
https://www.ansys.com/training-center/course-catalog/electronics/ansys-hfss-microwave-isolator

Regarding the Eddy current solver and the impedance (Z) value decreasing with frequency, this could be due to several factors including the setup of the simulation or the physical properties of the materials involved. It's important to ensure that the simulation setup accurately represents the physical system and that all relevant parameters are correctly defined.

As for the consideration of capacitance in the Eddy current results, typically, Eddy current solvers focus on the magnetic response of the system and may not directly account for capacitance. However, if you are looking to include the effects of capacitance in your impedance calculations, you may need to use a more comprehensive simulation approach that includes both the magnetic and electric field interactions, possibly through a coupled simulation.

Although you mentioned that HFSS deals mainly with transmission lines, it is actually a versatile tool that can handle a wide range of high-frequency electromagnetic simulations, including those involving ferrite materials and components like beads. HFSS's capabilities extend beyond transmission lines and can be used for various types of electromagnetic simulations 
https://www.ansys.com/en-in/products/electronics/ansys-hfss#tab1-1