A radar for tracking aircraft broadcasts at 12 GHz microwave beam from a 2.0-m-diameter circular radar antenna. From a wave perspective, the antenna is a circular aperture through which the microwaves diffracts.
A. what is the diameter of the radar beam at a distance of 30 km?
B. if the antenna emits 100 kW of power what is the average microwave intensity at 30 km?
A) d = 915 m
B) I = 0.152 W/m2