B.TECH - Semester 7 microwave and radar engineering Question Paper 2019 (jul)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- What are the advantages of microwave tubes?
- Define cyclotron angular frequency of Reflex Klystron.
- Explain the significance of admittance in reflex klystron.
- What are slow wave structures?
- What are the different modes of oscillation in gunn diode?
- Mention the applications of Tunnel diode.
- What is the principle of duplexer?
- How TWT differs from Reflex klystron?
- What is ' $S$ ' matrix?
- Explain microwave frequency measurement by electronic means. Answer any one full question from each Module.
- (a) Derive the expression for velocity modulation of 2 cavity klystron.
- (b) A two cavity klystron amplifier has the following parameters $V_{o}=1000 \mathrm{~V} R_{s h}=20 \mathrm{k} \Omega I_{0}=20 \mathrm{~mA} f=2 \mathrm{GHz}$ gap spacing $(\mathrm{d})=1 \mathrm{~mm}$, spacing between 2 cavities $(\mathrm{L})=4 \mathr...
- (i) Find the input gap voltage to give maximum voltage $V_{2}$. (ii) Find the voltage gain (iii) Find the efficiency of the amplifier. Calculate the beam loading conductance.
- Derive the expression for power output and efficiency of reflex klystron.
- Derive the expression for wave modes in TWT.20
- (a) Draw the diagram and explain the working of magnetron.
- (b) Derive the expression for Hull cut off voltage and magnetic equation.
- (a) Explain the physical structure of microwave bipolar transistor. ..... 10
- (b) What are the power frequency limitations. ..... 10 OR
- Explain the methods of measurement of impedance frequency and gain ..... 20 Module - IV
- (a) Explain the working of FMCW radar with diagram. ..... 10
- (b) Draw the diagram and explain the working of pulse doppler radar. ..... 10 OR
- Explain on instrument landing system with diagrams. ..... 20