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electric fields conversion from frequency domain to time domain

Posted Dec 12, 2017, 9:55 a.m. EST Low-Frequency Electromagnetics Version 5.3 1 Reply

Wanji He
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Hello, I have several questions about electric fields conversion from frequency domain to time domain. Could you please help me?

  1. Is a harmonic-wave source in COMSOL proportional to exp(iωt), not exp(-iωt)?
  2. The reason why I need to figure this out is that I need to compare E-field between COMSOL and my own coding, in which a harmonic-wave source is proportional to exp(-iωt). And in principle, in frequency field, the imaginary part of electric field(a1 + jb1) of harmonic-wave sources proportional to exp(iωt) is different from that (a2 + jb2) of sources proportional to exp(-iωt), and the relationship between a1, b1 and a2, b2 should be a1 = a2, b1 = -b2. Am I right for this relationship?

Best regards, He, Wanji

1 Reply Last Post Dec 13, 2017, 11:03 a.m. EST
Nirmal Paudel Tribhuvan University/Electrical Engineering
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Posted: 7 years ago Dec 13, 2017, 11:03 a.m. EST
Updated: 7 years ago Dec 13, 2017, 11:03 a.m. EST

Hi There,

This KB might be useful here:

https://www.comsol.com/support/knowledgebase/878/

Best Regards, Nirmal

Hi There, This KB might be useful here: https://www.comsol.com/support/knowledgebase/878/ Best Regards, Nirmal

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