> 2,500 square meters I'm not sure it's a weird antenna. Looks like the author took 50^2 (square with edge length 50 m) instead of \pi 50^2 (the traditional i

> 2,500 square meters I'm not sure it's a weird antenna. Looks like the author took 50^2 (square with edge length 50 m) instead of \pi 50^2 (the traditional interpretation of 50 m range).