3D patterns can be defined in any coordinate system. Spherical coordinate systems are most
commonly used to define antenna patterns.
Figure 1 shows the coordinate
system used in WinProp for the 3D display of antenna patterns. The
main direction of radiation is = 0° and = 0°.
Figure 2 to Figure 4 show the 3D pattern as well
as the vertical and horizontal plane of a Kathrein K739856 antenna together with the
coordinate systems used for display in AMan.