CST2013: Vertical and Horizontal Polarization

The vertical and horizontal polarization is often requested to be visualized in a farfield plot. Because the vertical or horizontal orientation of the polarization is related to the position of the antenna structure, it is just a matter of adequately choosing the coordinate system. The default coordinate orientation can be changed in the Farfield Plot Special Settings to define a new local reference system. Afterwards, the available phi and theta components enable the visualization of vertical or horizontal polarization parts, yet only at some special locations in space. The relevant facts to be considered in this context are demonstrated in the following by a short example.

To enable a somehow more plausible visualization, the local coordinate system in the Farfield Plot Special Settings is changed in an appropriate way. Regarding the farfield orientation, the new z’-axis is now represented by the y-axis defining the start for the angle theta and analogous the new x’-axis is given by the z-axis defining the start for the angle phi:

In the 3D plots, the new coordinate axes x’, y’ and z’ are marked by a stroke and are displayed in the farfield plot for a better understanding. As a result of the system’s rotation, the farfield plots of the phi and theta components have changed in a relevant manner, while the lobe of the absolute value has remained the same as before.