Thanks Marce, unfortunately that was the type of answer I was trying to avoid.
The .ant file is a particular file to create a 3D model of the radiation pattern of an antenna using 720 lines of information for degrees and power based on the 2D radiation patterns in your link.
I have resorted to creating the file myself. Below is the raw data for the 2.4GHz propagation, that can be copied to a text file and then saved as an '.ant' extension.
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