strange results from transmitter radiation calculation
Units, pay attention to the units.

If a transmitter puts out 30 mW, and you caculate mW/m2 on a surface that is less than 1 square meter, it is hardly surprising that the mW/m2 is higher than the transmitter output, which is bare watts, not watts per meter squared.

More simply, the results make perfect sense.

Following comments: Area of a sphere is 4•Pi•r•r

So a sphere with area of one square meter is: 1=4•Pi•r•r

or 1/(4•Pi) = r•r 

so 

squareroot[1/(4•Pi)] = r

and r is thus 0.282094791773882 (in meters)