B.TechSemester 72022-23Microwave Radar EngineeringKEC074

Microwave Radar Engineering (KEC074) - AKTU Question Paper 2022-23

B.Tech · Semester 7 · Free PDF Download

This is the official AKTU Microwave Radar Engineering Previous Year Question Paper for B.Tech Semester 7, academic session 2022-23. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech

Semester:Semester 7

Session:2022-23

University:AKTU / UPTU

Rate this paper

Questions Asked in 2022-23

Microwave Radar Engineering (KEC074) — complete question paper

Section AAttempt all questions in brief. 2x10 = 20

a
Explain various losses present in waveguides
b
Define characteristic impedance
c
Define the term directivity and coupling factor in directional coupler
d
Write down the different properties of s-matrix
e
Write down the limitations of c onventional tubes at microwave frequencies
f
Explain why slow wave st ructure is used in TWTs
g
Define the term VSWR
h
Define the term Dielectric Constant. (i) Discuss the concept of low angle tracking used in RADAR. (j) Define the term pulse re petition frequency in radar

Section BAttempt any three of the following: 10x3 = 30

a
Derive the field distribution of TE10 mode in rectangular w aveguide. Show that TE01 and TM10 modes do not exist in rectangular waveguide
b
Explain the operation of a Faraday rotation isolator with t he help of neat sketch. List the applications of ferrite isolator
c
Compare TWT and Klystron amplifier. Explain the amplificati on process of Travelling Wave Tubes (TWT)
d
Discuss the salient features of microwave measurements. Des cribe a voltage standing wave ratio (VSWR) meter
e
Explain with neat diagram, t he working of CW radar with non zero IF

Section CAttempt any one part of the following: 10x1 = 10

a
Derive the expression for fi eld components in TE mode for c ircular waveguide
b
TE11 wave is propagating through a circular waveguide. The waveguide is air filled and has a diameter of 12cm. Calculate c ut-off frequency (fc), guide wavelength for frequency of 2.5 GHz (λg) and wave impedance (Zg)
a
With a schematic describe the operation of a four port circ ulator. Obtain the simplified S matrix of a perfectly matched, lossless four port circulator
b
Write short note on: i. Phase Shifters ii. Attenuators
a
Explain the schematic diagr am, operating principle and perf ormance characteristics of Backward Wave Oscillators (BWO)
b
A Two-CavityKlystron amplifie r has the following parameters: V0 = 1000 V, R0 = 40 kilo-ohm, I0 = 25 mA, f = 3 GHz, d = 1 mm, L = 4 cm, R sh (effective shunt impedance, excluding beam loading) = 30 kilo-ohm. i. Find the input gap voltage to give maximum voltage V2. ii. Find the voltage gain, neglecting the beam loading in the outpu t cavity. iii. Find the efficiency of the amplifier, neglecting beam loading
a
Write short note on: i) Power Meters ii) Microwave Amplifiers
b
Write short note on: i) Measurement of Insertion Loss ii) ReturnLoss
a
Derive simple form o f radar range equation
b
A typical pulse radar waveform has T on =10µs, pulse repetition period (Tr) = 10msand peak power= 10 MW. Find: i) Duty cycle ii) Maximum unambiguous range (Run) iii) Average power (Pavg)

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

Repeated Questions — KEC074

Questions that appeared in more than one session, found by comparing 2 years of Microwave Radar Engineering papers (2022-23, 2024-25)

Define the term directivity and coupling factor in directional coupler