You could have downloaded PolarPlot 3.2.3 from our software library for free. You can install PolarPlot on Windows XP/Vista/7/8/10/11 32-bit. The most popular version among PolarPlot users is 3.2. The program lies within Education Tools, more precisely Science Tools. This free program is a product of G R Freeth. The most frequent installation filename for the program is: PolarPlot.exe.
From the developer:
The primary purpose of PolarPlot is to enable you to better understand the operating characteristics of a beam antenna.
The program is intended for the amateur radio community. It may also be useful for educational and professional purposes when accuracy requirements permit.
The program plots relative power in dB and relative field strength polar diagrams, and gives an indication of the gain in dBi of the measured antenna.
You may want to check out more software, such as Wintree, World Geography Tutor or FSAcars, which might be similar to PolarPlot.