Q11/ Figure below shows a typical microwave receiver used in satellite communication. Calculate: i) ii) The overall noise figure of the receiver. The overall equivalent temperature of the receiver. Assume that the ambient temperature T = 17°C. Y Te-5'K Master Amp. G1-30dB or (1000) F2=5dB or(4) TWT G2-20dB or (100) (ans. F=1.02=0.08766dB) (ans. Te=5.8°K) F3-12dB or(16) Mixer and IF Amp. G3=40dB or (10000)

Butterworth Low-Poss filte Apmon = 3 dB Apara 24dB %3D te : ISLH2 .. 26 LHa Tronfer furetion = ? frequency ? (1)

An AM signal as shown below. The carrier frequency is 600 Hz, and the modulating signal is a single-tone sinusoidal signal. The x-axis is in time while the y-axis is the amplitude of the AM signal. Answer the following questions with appropriate solution if applicable. Determine the type of AM signal in the figure. Determine the frequency of the message signal in Hz. If the peak voltage level of the modulating signal and carrier are 1V and 2V respectively, determine the modulating index. Determine the power of the unmodulated carrier in W. Assume the load resistance to be 1-ohm. Determine the power of sidebands in W. Determine the total power of the AM signal in W.

Suppose a manufacturing error occurred and the oven was made 6.0 cm longer than specified in part (a). In this case, what would have to be the frequency of the microwaves for there still to be five antinodal planes of the electric field along the width of the oven?