STUPIDSID
1(a)
Define reflection coefficient. Derive the equation for reflection coefficient at the load end and at a distance 'd' form load end.
10 M
1(b)
A transmission line has the following primary constants per km of the line R:
8Ω, G=0.1μ℧, L=3.5mH, C=9nF. Calculate zo, α, β,up and γ at w=5000rad/sec.
5 M
1(c)
A transmission line and characteristic impedance of 50+j0.01Ω and is terminated in a load impedance of 72-j42.5Ω. Calculate i) the reflection
coefficient; ii) Standing wave ratio
5 M
2(a)
Derive electric and magnetic field equation in rectangular wave guides for TE modes.
12 M
2(b)
Write a brief note on dominant mode degenerate mode.
4 M
2(c)
An air - filled rectangular waveguide of inside dimension 7 × 3.5 cm operates in the dominant TE10 mode. Find cutoff frequency,phase velocity,guided wavelength of the wave in the guide at a frequency of 3.5 Ghz.
4 M
3(a)
Mention the four modes of operation for gunn diode. Explain briefly the gunn oscillation mode.
10 M
3(b)
Draw the equivalent circuit for parametric amplifier and explain in brief the parametric up converter.
5 M
3(c)
Explain the principle of operation of read diode with suitable diagram.
5 M
4(a)
State the properties of S- parameter. Prove the symmetry property and unitary property of S- parameter.
10 M
4(b)
Explain S-matrix representation of multiport network.
6 M
4(c)
Define the following losses in microwave network in terms of s parameter :
i) Insertion loss ii) Transmission loss.
i) Insertion loss ii) Transmission loss.
4 M
5(a)
Explain with a neat sketch a precision type variable attenuator.
6 M
5(b)
Explain magic tee and derive the S- matrix and mention its application.
10 M
5(c)
Write a brief note on phase shifter.
4 M
6(a)
Explain the construction and filed pattern for micro strip line.
8 M
6(b)
what are the losses in microstrip lines? Explain radiation losses.
8 M
6(c)
Compare strip line microstrip line.
4 M
7(a)
Derive an expression for simple form of the radar range equation
8 M
7(b)
A ground radar operates at 3cm. The radar transmitter using an antenna of gain 50dB. Produces 100 kW. The receiver minimum detectable signal is\[S_{min}=10^{-13}\] W. The maximum radar range is given as 259km. Find the cross section of the target the radar can detect.
8 M
7(c)
Write a brief note on maximum unambiguous range.
4 M
8(a)
With a neat diagram,explain the advantage of I and Q channels in digital MTI Doppler signal processor.
6 M
8(b)
Explain the principle and working of MTI radar with the help of block diagram.
10 M
8(c)
Explain single delay line canceller with neat block diagram. Derive an expression for frequency response of single DLC.
4 M
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