probe fed in software electromagnetic

[sahar20]

I use from probe fed to patch.but i dont undrestand concept"division angle"in probe fed to patch. I examination for different divition angle(between -90 to 90), but simulation give different response. for example, for one rectangular patch with division angle=0 give -10db in f=1.8GHZ and for division angle=50 give -18db in f=1.8GHZ please explain for me concept division angle and i should what number give for division angle.

 

[nazanin]

It is used to determine how we divide the polygons when we insert teh probe. It will affect the meshing. If you get S11 = -10 dB at 18 GHz for one meshing or =18 db at 18 GHz for another meshing for an antenna, it can be quite nature. It is possible that the 2 results are very close. There might just be some slight frequecy shift for the resonant frequency.