Modeling Tool to study coupling of thin wire coils
Tried modeling in CST it gives me impossibly long simulation times.
Are there modeling tools suitable for such job?
Specifically I need modeler suitable for modeling coupling between coils of thin wire with and without conductive cores when dimensions and distances between the coils are electrically very small, less then 0.01 wavelength.
Appreciate you advice,
Thank you.
What is conductive core? As all 13.56 MHz coil setups, the problem refers to a simple AC magnetic simulation. Using a full featured EM solver is simply inappropriate. Depening on the geometry, e.g. FastHenry or Quickfield can do the job.
Yes, I agree with FvM: not sure, but FastHenry could be OK. I suggest you to visit the site Fast Field Solvers. It is a 3D graphical interface for FastHenry (and FastCap).
Conductive core one coil Air another coil Air Titanium.
I want to move coils around and study coupling
Coils can be coaxial or can be oriented at different angles to each other.
The term core is referring to magnetic materials in common usage, e.g. ferrite or "air" (no core). Metallic sheets or solids can exist in coil geometry and either attenuate or shield magnetic fields, but I won't designate them "cores". Larger metallic objects reduce the coil inductance and Q. Thus they are avoided in RFID applications if ever possible.
I understand, that you intend to analyze arbitrary 3D geometries. So the solver must be capable of representing it, which excludes some tools. FastHenry models structures by rectangular rods connecting points in 3D space, in so far it can represent arbitrary geometries. The point is to find an appropriate abstraction level, not being too pendantic in exact modelling.
>> the problem refers to a simple AC magnetic simulation. Using a full featured EM solver is simply inappropriate.
This was revealing, thank you. I ended up doing all the study analytically, also made several coil prototypes and measured it's inductance.
Formulas works well.