Hello folks,
I have a question about free space propagation of a Gaussian in MEEP. My
source has frequency 5 GHz <= f <= 16 GHz and I'm using the Ex
component. I place the source at the top, place a flux plane right
beside it and another flux plane down at the bottom of the cell. I then
compute the flux by dividing the bottom flux by the top. I thought I
would get a transmission spectrum approximately equal to 1, but the
spectrum looks like an M, with the central part close to 1, but the
highest and lowest frequencies dipping to 0.4.
Any idea why this is the case? Extending the length of the computational
cell to a couple of wavelengths doesn't fix it.
The code is here:
http://pastebin.us/8887
Thanks.
Ashifi.
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