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Regarding Far-field calculation in Rf module
Posted 12.06.2013, 00:03 GMT-4 RF & Microwave Engineering Version 4.3 0 Replies
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physics is known as the “scattering amplitude”."
However, I am confused about the calculated far-field emw.Efarx (emw.Efary, emw.Efarz, emw.normEfar etc), in COMSOL, they all have the unit of "V/m" which is the same as the electric field.
On the other hand, in physics, the "scattering amplitude" F is defined as:
E_scat=exp[i omega r]*F/r
thus, "scattering amplitude" F should be in unit of "V" rather than "V/m". This is in consistent with the equations in the "Far-field Calculation Theory" section of RF module User Guide, but not agree with the emw.Efarx in COMSOL.
So, my question is, what's the unit of calculated emw.Efar in COMSOL? Is it the "scattering amplitude" F or the real scattering field "E_scat"?
Many thanks for any help.
Hello Hui Zhang
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