A radar for tracking aircraft broadcasts at 12 GHz microwave

Katherine Walls

Katherine Walls

Answered question

2022-01-17

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?

Answer & Explanation

ramirezhereva

ramirezhereva

Beginner2022-01-16Added 28 answers

b) The average microwave intensity is,
I=PA
=Pπr2
=4Pπd2
=4(100×103 W)π(915 m)2
=0.152 Wm2
RizerMix

RizerMix

Expert2022-01-19Added 656 answers

a) The wavelength of the wave is, λ=cf =3×108 m/s12×109 Hz =0.025 m =25 mm The angular resolution of the system is, sinθ=1.22(λD) =1.22(25 mm2 m) θ=sin1(0.01525) =15.25 mrad The diameter of the radar beam from the half angle is, d=2(15.25 mrad)(30 km(1000 m1 km)) =915 m
alenahelenash

alenahelenash

Expert2022-01-23Added 556 answers

Refer to this one, they're both correct!

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