1(a) What is meant by RADAR range?

1(b) Discuss the characteristics of microwaves.

1(c) Given the circuit shown in Fig. 1(C), design a lumped element matching network at 60 MHz that would transform Load impedance Z$_L$= 100-j25$\Omega$ into an input impedance of Z= 25+j15$\Omega$. Take Z$_0$= 50$\Omega$.

2(a) With a neat functional diagram explain the working principle of Cylindrical Magnetron.

2(b) Write a short note on circular waveguide.

3(a) Explain working of TRAPATT.

3(b) Radar operating at 1.5 GHz uses a peak pulse power of 2.5 MW and has a range of 100 nmi for objects whose radar cross section is 1m$^2$. If the minimum receivable power of the receiver is 2*10$^{-13}$ Watt, what is the smallest diameter of the antenna reflector could have assuming it to be a full paraboloid with $\eta$=0.65

4(a) Explain any one bio-medical application using microwave.

4(b) match a load impedance Z$_L$= 60-j80 to a 50$\Omega$ line using a double stub tuner. The stubs are open circuited and are spaced $\lambda$/8 apart. The match frequency is 2 GHz.

5(a) With block diagram explain the MTI radar system. Give its limitations.

5(b) Explain Doppler Shift and its role in pulsed and CW RADAR.

Q6) Write a short note on following:

• a) Phase shifters
• b) Reflex Klystron

• c) Gunn diode 998

• d) Clutter 1006