antenna radiation pattern distance

Hello.

I design microstrip patch antenna and I am using Antenna tool.

And I have a question.

I want to know the distance of the radiation.

.

(#1 in figure)

How can I get this value?

I don't know how to get the antenna's radiation distance information.

Answer 1

[Sandip Ghosal]

The function pattern uses far-field distance to compute the radiation pattern of the antenna/array. Alternate workflow is use EHfields to compute the fields where the observation location can be manually set.