Learning Forum

[Amrita Pati]

Hi Prabha,

I apologize for not getting back to you on your other post. I miss out on the alert emails sometimes.

The standard farfield projections are performed on a hemispherical surface but they are are flattened to be plotted in a 2D plane (the 2D plane looks like how the hemisphere would look from the top). The last plot you have shared is an example of that. But in the example link (micro-LED) you have shared, we have intentionally created an unstructured dataset to be able to plot the results on a hemisphere, as a result the plot is 3D, and x, y, and z are the direction cosines. To convert it back to 2D polar form would require a lot of co-oridnate transformation. It is not impossible, but going to be complicated especially because we don't have any exisiting scripts.

I believe the simplest approach would be to place a single monitor infront of the source, and visualize the farfield from this monitor. The monitor would plot the results in the polar form on a plane. To make sure that the single monitor collects most of the radiation you have to place the monitor close to the source, and also make the monitor as well as the simulation span large.

For example, you can plot the farfield from "z2" in your case,

But as I said, since you will have farfield from only one monitor (we won't have the side monitors x1, x2, and y1, y2) it is important to make sure that the z2 monitor gathers most of the radiation, by making it really large. 

Regards,
Amrira