Time domain result from frequency sweep

User: "Altair Forum User"
Altair Forum User
Altair Employee
Updated by Altair Forum User
 こんにちは,

I solved a model in FEKO that consisted of two coils excited by current source of 1uA@60Hz. The idea is let EM waves be produced from symmetric coils, and penetrate inside a spherical body made of both dielectrics, and metal. I got near fields for a single frequency of 60Hz. I intend to simulate an aperiodic time pulse that looks like:

BiphasicCurrentPulse.jpeg.5477788451fe0bb22f6f757e7e8d7b34.jpeg

In Solution frequency dialog box, I put up following values:

image.png.24a4fe5bfdb80b612c8f3121dfaf7004.png

After solution is obtained, I can create New time signal in POSTFEKO, by specifying values in dialog box below:

image.png.997620d07fed91a9c0282574cc378910.png

I simulated part of biphasic pulse with a Gaussian pulse. Spectrum preview shows that frequencies should be 0-3.5kHz.

 image.png.a7c490fda84485649821ceae63a28391.png

I specified solution frequency of 500Hz-1MHz, and spectrum preview shows lower frequency of 0kHz. I can't put in start frequency as 0Hz because that becomes DC. 

 

  1. Is part of biphasic time-domain signal correctly simulated?
  2. Is choice of logarithmicaIly spaced discrete points correct?
  3. Should I change frequency sweep to 0-3.5kHz?

 

 

非常感谢你,

FieldForcer

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