During a test, a NATO surveillance radar system, operating at 12 GHz at 180 kW of power, attempts to detect an incoming stealth aircraft at 90 km. Assume that the radar beam is emitted uniformly over a hemisphere. (a) What is the intensity of the beam when the beam reaches the aircraft’s location? The aircraft reflects radar waves as though it has a cross-sectional area of only 0.22 m2. (b) What is the power of the aircraft’s reflection? Assume that the beam is reflected uniformly over a hemisphere. Back at the radar site, what are (c) the intensity, (d) the maximum value of the electric field vector, and (e) the rms value of the magnetic field of the reflected radar beam?
During a test, a NATO surveillance radar system, operating
at 12 GHz at 180 kW of power, attempts to detect an incoming
stealth aircraft at 90 km. Assume that the radar beam is emitted
uniformly over a hemisphere. (a) What is the intensity of the beam
when the beam reaches the aircraft’s location? The aircraft reflects
radar waves as though it has a cross-sectional area of only 0.22 m2.
(b) What is the power of the aircraft’s reflection? Assume that the
beam is reflected uniformly over a hemisphere. Back at the radar
site, what are (c) the intensity, (d) the maximum value of the electric
field vector, and (e) the rms value of the magnetic field of the
reflected radar beam?
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