B.TECH - Semester 7 microwave engineering Question Paper 2020 (sep)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- 703 : MICROWAVE ENGINEERING (T) (2008 Scheme) Time : 3 Hours Max. Marks : 100 PART - A Answer all questions.
- Write notes on various slow wave structures used in TWT amplifiers.
- Give comparison between Klystron and TWT.
- Explain group velocity and phase velocity in a wave guide.
- What are the high frequency limitations of transistors?
- What is meant by $\pi$-mode oscillation in a magnetron?
- Explain the operation of a tunnel diode.
- What is Gunn effect? Give the principle of operation of Gunn diode.
- Explain the properties of S-matrix.
- Explain frequency diversity.
- Explain the set up for microwave power measurement. ( $\mathbf{1 0} \boldsymbol{\times} \mathbf{4} \boldsymbol{=} \mathbf{4 0}$ Marks) Answer any two questions from each Module. Each question caries 10 marks.
- (a) Explain the operation of a two cavity klystron.
- (b) Derive the expression for output power of two cavity klystron.
- Explain the operation of a TWT amplifier and derive the expression for convection current.
- Derive the power output and efficiency of a reflex Klystron.
- Explain different modes of operation of a GUNN diode.
- Derive output power and efficiency of a cyclotron frequency magnetron.
- Explain the operation and VI characteristics of MESFET.
- Explain the operation of microwave circulator and isolator.
- Explain the block diagram of a microwave repeater.
- (a) Define directivity and coupling factor of a directional coupler.
- (b) Derive the S-matrix of directional coupler.