a. depends on the received power at the RX antenna b. depends on the backscatter

Question

a. depends on the received power at the RX antenna b. depends on the backscatter crossection. c. depends on the antenna gain. d. depends on the magnitude of the incident power _9. The effective area of an antenna Ae is practical rs physical area for a. greater than b. smaller than c same as d. double as 10. For a microwave link established in a monostatic mode, what is the efficiency of the antenna used i it has radiation intensity of 2Wisr for an input power of 1.7W and directivity of 1208 a, 80% 85% b. c.90% d. 95% RCS [m] 0.001 be detected within a distance of 1km, which gives a return of 4mW Brds for a TX power of 1MW in the Man monostatic radar system? The antenna is a 2m-diameter dish Auto operating at the X-band of 10GHz with an aperture efficiency of 70% Note: it doesnt have to be exact tut in the order of. 100 a. Insects b. Birds c. Cabin-cruiser d. Auto 12. Assume you buy two identical antennas with a gain of 30dB for TX and RX in a microwave link. You transmit 50kW with Antenna 1 and receive in Antenna2 1mW. How far are these antennas apart it both are working at 3GHz? c. R-500m 13. The antenna radiation pattern a. represents the power radiation and antenna properties b. represents the received power by the antenna c. represents how the system will scatter the power d. represents the objects scattered power --. 14. The electrical field - with crossection of 20dB located 30km radar that TX 2kW of power with an antenna with Go=15dB

Explanation / Answer

9Ans : Option (A)

The effective area will be greater than the physical area of an antenna. The effective area is the one around which it has its power in general which is greater than the actual physical area of an antenna.

Therefore Option (A) is the correct answer.

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