What are the underline assumptions while drawing the PowerPattern of an array in PlotResponse ?

What is the input power assumed while drawing the power pattern of an array, what are the units of power pattern ? and at what distance power pattern is plotted ? Is there any provision to change the default settings for drawing power pattern ?

I assume the input power is 4*pi Watts (i.e. 1 W/steradian), and power pattern is plotted at the surface of 1m sphere, can anybody confirm ?

Answer 1

[Honglei Chen]

Hi Raza,

The power pattern can be considered as plotted on the surface of a sphere. The radius doesn't matter too much as long as it's in the far field. I don't think it assumes the unit power pattern. It simply plots the magnitude square of the field pattern. The main information conveyed in the field pattern is the relative spatial dependency. So in general only the shape matters unless you look into the directivity pattern which uses an isotropic pattern as a reference.

HTH