f6dro
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Hello ,
I have what I find quite misleading results under HFSS. The air box size used for far field computations plays quite an important role on the results.
Of course I use a minimum size which is big enougth ( quarter wave around the structure) , but when I try to vary the size of the box ( bigger box of course) , I find significant differences in the far field pattern ( more than 3db difference on the backlobes) , and last but not least , 10 db difference on s11 !!
I tried this on 2 different structures:
-the first one is a loop antenna ( one wavelength torus in front of a one wavelength circular reflector) at 1296Mhz.
-The second one is a conical horn on 24Ghz.
Any idea ?
Dom
I have what I find quite misleading results under HFSS. The air box size used for far field computations plays quite an important role on the results.
Of course I use a minimum size which is big enougth ( quarter wave around the structure) , but when I try to vary the size of the box ( bigger box of course) , I find significant differences in the far field pattern ( more than 3db difference on the backlobes) , and last but not least , 10 db difference on s11 !!
I tried this on 2 different structures:
-the first one is a loop antenna ( one wavelength torus in front of a one wavelength circular reflector) at 1296Mhz.
-The second one is a conical horn on 24Ghz.
Any idea ?
Dom