Microwave Engineering — Winter 2017

Discuss in brief advantages and application of microwave.

Define: (1) Characteristic Impedance (2) VSWR (3) Reflection coefficient (4) Transmission coefficient

Explain with merits and demerits of micro strip line, Also explain briefly parallel strip line.

Explain the impossibilities of TEM wave propagation through waveguide.

Sketch circular and rectangular wave guide and compare it.

Draw equivalent circuit of transmission line and drive basic equation for voltage and current on transmission line, Define characteristic impedance of Tx -line.

What is the importance of impedance matching? Explain single stub and double stub matching in brief. Q-3 (a) Define coupling factor, directivity & isolation factor w.r.s.t directional coupler.

Write all properties of Smith chart.

Atelephone line has R = 6 Ω/km, L = 2.2 mH/km, C = 0.005 µF/km, and G = 0.05 µmho/km. Determine Z , α , β at 1 KHz. If the line length is 100 km,0 determine the attenuation and phase shift of the signal. Calculate the phase velocity of the signal.

Q-3 (a) What is S-Matrix? What are the properties of S-Matrix?

Draw schematic of four port circulator and explain its working,

Draw and explain E-plane Tee. Derive its S-Matrix.1 Q-4 (a) What is MMIC? Which materials are used for MMIC fabrication?

Write a short note on Two Cavity Klystron.

Explain construction, characteristic and application of Gunn diode.

Q-4 (a) Write notes on Medical and Civil related application of microwave.

Describe the working of a reflex klystron.

Explain working of TRAPATT diode. Write its limitations and applications. Q-5 (a) What are the problems associated to conventional tubes at microwave frequencies?

Explain Brief notes on any one Microwave Antenna.

Explain briefly different method of Impedance measurement at microwave frequency.

Q-5 (a) Brief note on microwave satellite system.

Write notes on Remote Sensing system.

Explain Network Analyzer and how different scattering parameters are measured?