1.

Find the S/N for a 5-dBsm target at a range of 175 km with a radar having the following parameters: P _P = 5 kW, G _T = G _R = 35 dB, f = 3.3 GHz (S band), PC = 10 ⁵, B = 100 MHz, T _S = 450K, and L = 4 dB. What is the pulse duration? Is the minimum-range constraint violated?

2.

What loss components are included in the transmit microwave loss, L _MT, and the receive microwave loss, L _MR?

3.

A phased-array antenna consists of 2,000 elements, each with an element gain, G _E, of 5.5 dB, and transmit ohmic loss, L _AT, and receive ohmic loss, L _AR, of 0.2 dB each. If uniform aperture illumination is used for transmit and the transmit antenna losses are not included in the transmit gain, G _T, what is that transmit gain? If the radar operates at 5.5 GHz (C band), employs 20-dB Taylor aperture weighting on receive, and the receive antenna losses are not included in the effective receive aperture area, A _R, what is the receive aperture area?

4.

A radar is said to provide S/N = 15dBona1m ² target at a range of 1,000 km, an elevation angle of 5 degrees, and an off-broadside scan angle of 30 degrees using a 5-ms pulse. If the radar is an FFOV phased...