3. A radar receiver shown in Figure 2. The antenna receives an 45-μV signal into its 80- 2 input impedance. The received signal is at 200 MHz with a bandwidth of 20 MHz. Evaluate; Antenna, 800 Loss = 10 dB NF = 8 dB Cable RF Ampli- fier Mixer IF amplifier Loss = 5 dB NF 15 dB Gain = 20 dB NF=7 dB Gain = 30 dB NF 12 dB LO (i) (ii) (iv) Figure 2 The input signal power, Ps(in) in watt The overall gain in dB The output power, Ps(out) in watt. The input noise power in watt, PN(in). (Given Boltzmann constant, k = 1.38 x 10-23) (v) The overall noise factor, Fr of the system. (14 marks) 4. Distinguish between baseband and broadband signal in communication system by giving example of application and illustrating them into a block diagram.