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Dump Sampling/Save Frequency?

Posted: Thu 13 May 2021, 05:08
by A_Krill
Hi,

Recently found openEMS and have to say it is some very nice software.

I am trying to make a nice clean animation of a Yagi-Uda antenna in the time domain. This is something I've wanted to do since I took my first antenna theory class in college. Finally got around to learning an FDTD software package :)

So, I have a FDTD simulation that is working reasonably well. I have a nice 4 element Yagi, this returns what I would expect in terms of directivity, and the time-domain simulation looks pretty accurate too.

Only problem is the number of time steps between "saves". This is producing a very choppy animation.

I have observed that changing the TimeStep and TimeStepFactor parameters will increase the time it takes to simulate, and it will increase the "Excitation signal period" and other parameters- but it will not actually increase the number of dumps per wave period. Equally choppy animation, just more processing behind the hood.


Does anybody know of a way to increase sample frequency?


Thanks,
Andrew

Re: Dump Sampling/Save Frequency?

Posted: Thu 13 May 2021, 05:18
by A_Krill
Answering my own question here,

Wasn't finding anything on google, but the forum search came through, after I posted it.

FDTD = InitFDTD('OverSampling', 4);

Re: Dump Sampling/Save Frequency?

Posted: Thu 13 May 2021, 16:18
by A_Krill