B.TECH - Semester 7 microwave and radar engineering Question Paper 2020 (sep)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- (b) Discuss the power frequency limitations of the transistor. OR
- What are reentrant cavities?
- Mention the properties of scattering matrix.
- Explain the working of hybrid ring.
- What is the significance of electronic admittance of Reflex Klystron.
- Explain the amplification process in TWT.
- What is the principle of Tunnel diode?
- Explain microwave frequency measurement by electronic means.
- What is a delay line canceller?
- Explain the principle of duplexer in radar.
- Differentiate pulse doppler radar from MTI radar. ( $\mathbf{1 0} \boldsymbol{\times} \mathbf{2} \boldsymbol{=} \mathbf{2 0}$ Marks) P.T.O.
- (a) Derive expression for resonant frequency of rectangular cavity resonator.
- (b) Explain the working of Reflex Klystrom with block diagram and derive expression for power output and efficiency.
- A 2 Cavity Klystrom has the following parameters: $V_{0}=1000 \mathrm{~V}, R_{0}=30 \mathrm{k} \Omega$, $I_{0}=20 \mathrm{~mA}, f=2 \mathrm{GHz}, d=1 \mathrm{~mm}, L=4 \mathrm{~cm}, R_{s h}=30 \mathrm{k} \Omega$. (a) Find the input gap voltage to giv...
- A 2 Cavity Klystrom has the following parameters: $V_{0}=1000 \mathrm{~V}, R_{0}=30 \mathrm{k} \Omega$, $I_{0}=20 \mathrm{~mA}, f=2 \mathrm{GHz}, d=1 \mathrm{~mm}, L=4 \mathrm{~cm}, R_{s h}=30 \mathrm{k} \Omega$. (b) Find the voltage gain, neglecting...
- A 2 Cavity Klystrom has the following parameters: $V_{0}=1000 \mathrm{~V}, R_{0}=30 \mathrm{k} \Omega$, $I_{0}=20 \mathrm{~mA}, f=2 \mathrm{GHz}, d=1 \mathrm{~mm}, L=4 \mathrm{~cm}, R_{s h}=30 \mathrm{k} \Omega$. (c) Find the efficiency of the amplif...
- A 2 Cavity Klystrom has the following parameters: $V_{0}=1000 \mathrm{~V}, R_{0}=30 \mathrm{k} \Omega$, $I_{0}=20 \mathrm{~mA}, f=2 \mathrm{GHz}, d=1 \mathrm{~mm}, L=4 \mathrm{~cm}, R_{s h}=30 \mathrm{k} \Omega$. (d) Calculate beam loading conductanc...
- (a) Draw the diagram and explain the working of Magic T .
- (b) Derive the scattering matrix of Magic T.
- Derive expressions for the wave modes in a TWT.
- (a) Explain the physical structure of microwave bipolar transistor.
- (a) Explain two valley model theory of Gunn diode.
- (b) Explain the working of IMPATT and TRAPATT diodes.
- (a) Explain the working of FM.CW radar with diagram.
- (b) What is a radar modulator. Explain.
- Explain MIT radar with power amplifier and power oscillator compare the performances.