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I notice this all the time simulating resonant cavities at 2.45 GHz - adding some kind of coupler like an aperture/waveguide gives your cavity a slightly larger volume, thus your frequency is slightly lower.
Also look at the mesh and the order of the simulation - make sure both eigenmode and...
Hello,
I'm modeling a simple cylindrical resonant cavity with waveguide excitation of the TM010 mode. It takes about 30 seconds to run this simulation, no problem, plenty of experience doing this type of thing.
Now I want to see the effect of placing a permanent magnet at the bottom of the...
No. Even if you specified the solver to somehow 'pass over' unwanted resonant frequencies, the natural frequencies will still be there. You need to make structural changes to suppress unwanted modes.
If you downsize the structure such that you are operating closer to the fundamental (first)...
Do you see many dips in the reflection curve around 2.45 GHz? If so, simulate the structure using the Eigenmode solution type first. That will easily show what modes you need to suppress assuming they are too close to the desired mode at 2.45 GHz. If you are desiging something to be powered...
The solution frequency is the only frequency that is used for the adaptive analysis. I've never seen different results for a sweep when using a different solution frequency but I usually choose it to be near the middle of the sweep.
It looks like you did not decrease the frequency step size...
You could make a coax cable using cylinders and define the inside dielectric as the wave port surface. Then normalize the waveport to 50 ohms and you should be able to match your SMA.
Hi Jacob,
First use the Eigenmode solver to find the resonant frequencies of the cavity. This requires no input port and will tell you where your cavity resonates. Then adjust your dimensions to move the resonant frequency if desired. I suggest using the optimetrics tool to sweep a dimension...
Hi,
I'm using HFSS to model a resonant cavity with a waveguide delivery excited by a 6kW wave port. I would like to calculate the power density (W/cm^3) at every point in the cavity as well as the total average power density.
I have tried using the energy stored in a resonant cavity equation...
I figured out several solutions to alleviate the problem: going into tools>options>General options>General>dynamically update post processing data for new solutions>immediately. This lets HFSS generate plot data during simulation time I believe.
Also in the same options window specifying the...
Check the phase of the magnetic field plot. If the phase is 0 degrees the H field will be zero so set the phase to 90 to see the magnetic field.
Animating over phase should also show it.
Update:
This doesn't make sense, when I run a single simulation (Eigenmode, 2 modes and a single geometry) it will take seconds to display the single field after the sim is complete. When a parameter sweep is performed and I have 1000 different geometries it will take 10 minutes to generate the...
Hello,
I'm using HFSS to observe E fields in a simple microwave resonant cavity and experiencing problems generating animations. These are simple 3 plane views of the magnitude of the E field.
After a job is complete a single plot will display in a matter of seconds. However just loading the...
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