STUPIDSID
1(a)
Discuss the advantages of microwave frequencies compare with low-frequency
waves and list out the various applications of microwaves.
7 M
1(b)
Write the advantages and disadvantages of rectangular waveguide over circular
wave guide .List out the differences between the TE mode and TM mode.
7 M
2(a)
What do you mean by stub? Explain impedance matching by use of stub with necessary circuit, waveforms and derivation
7 M
Solve any one question from Q.2(b) & Q.2(c)
2(b)
Explain structure and working of TRAPATT diode with necessary waveforms and derivations.
7 M
2(c)
Explain construction, characteristic and application of Gunn diode.
7 M
Solve any one question from Q.3 & Q.4
3(a)
What is the working principle of Radar? Draw and explain block diagram of MTI radar.
7 M
3(b)
Define following :
(i) Guide wave length
(ii) Group velocity
(iii) Phase velocity
(iv) Wave impedance
(v) VSWR
(vi) Return loss
(vii) Characteristics impedance
(i) Guide wave length
(ii) Group velocity
(iii) Phase velocity
(iv) Wave impedance
(v) VSWR
(vi) Return loss
(vii) Characteristics impedance
7 M
4(a)i
A transmission line has the following parameters:
R=2Ω/m G=0.5mmho/m L=8nH/m
C=0.23pF f=1GHz Calculate the characteristic
Impedance and the propagation constant.
R=2Ω/m G=0.5mmho/m L=8nH/m
C=0.23pF f=1GHz Calculate the characteristic
Impedance and the propagation constant.
4 M
4(a)ii
Draw and explain equivalent circuit of a length Δx of a transmission line at microwave frequencies
3 M
4(b)
Write properties of smith chart and explain its application with example.
7 M
Solve any one question from Q.5 & Q.6
5(a)
What is magic associated with a Magic Tee ?Draw a neat sketch of a Magic Tee and list out its applications and properties.
7 M
5(b)
Explain working of Circulators and isolators with neat sketch.
7 M
6(a)
Write short note on: Micro strip lines
7 M
6(b)i
Explain working principle of PIN diode.
3 M
6(b)ii
Write radar range equations and discuss the factors influencing maximum range of radar.
4 M
Solve any one question from Q.7 & Q.8
7(a)
Explain the principle of operation of a multy cavity klystron with necessary diagram and waveforms. Write applications of it .
7 M
7(b)
Draw block diagram of pulsed radar and derive the equation to determine the maximum range of radar
7 M
8(a)
What are the problems associated to conventional tubes at microwave frequencies. Explain working of TWT with necessary diagram and waveforms.
7 M
8(b)
An air filled rectangular waveguide has dimensions of 6cm × 4cm. It propagates a signal at 3 GHz. Compute the Cut-off frequency, Guide wavelength, Phase constant, Phase velocity, Group velocity and Wave impedance for TE10 mode.
7 M
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