Mumbai University Previous year question papers
VI Sem Electronics Examination June 2007
N.S.: (1) Question No.1 is compuisory.
(2) Attempt any four questions out of remaining six questions.
(3) Figures to the right indicate full marks.
1. (a) Explain remote sensing radar in brief.
(b) What do you understand by the term four point tracking?
(c) Explain in brief the various system losser in the radar.
d) Explain in brief radar resolution cell.
2, (a) ,Describe the chief characteristics of the radar echo from a traget when its radar crbss-section is in the (i) Rayleigh region; (ii) Resonance region and
(iii) in the optical region.
(l) Explain the methods for the integration of radar pluses to improve detection. Define the term integration improvement factor. How does this facto( affect the radar range e.quation ?
3. (a) What do you mean by ReS fluctuations? Explain different swerlings model for RCS fluctuations.
(b) What is the drawback in simple ew radar? How it is overcome in eW-IF radar? ‘Draw and explain eW-IF radar in detail.
.4.(a) Explain the function of single delay line cancellar and derive an expression for the frequency response function. How the drawback of clutter attenuation problem is overcome by double line cancellar ?
(b) Draw the functional block diagram of an MTI rada’ system and ex~lain its operation. Define the terms blind speed and NlTIimprovement factor.
5.(a) With a suitable block diagram explain the working of a conical scan tracking radar. Explain the various factors that need to be considered in determining the optimum squi[1t angle.
(b) State the factors which influence the bandwidth of radar receiver. Write down the adval’,1tages of large B. W.
6. “‘(a) Explain the limitations of ILS and how the same have been overcome in the MLS? 10
(bY-Explain the principle of operation of Hyprobolic Navigation system. Compare the principle of operation of Loran A and Loran e.
‘7.Write short notes on the following :-
(a) Phased array radar
(c) VHF omnirange (VOR)