>>12354545I'm pretty sure microwaves from a source would be affected by the inverse square law.
I guess if I wasn't phone posting I could calculate it assuming some frequency and source. If it was in all directions it would be 4piR.
However off the top my head the troops would have to be close, so like grenade distance. And it would have to be stationary as the power supply for such a device would be too large to package in something that small.
Not sure though.