B.TechSemester 72024-25Microwave Radar EngineeringKEC074

Microwave Radar Engineering (KEC074) - AKTU Question Paper 2024-25

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 2024-25. 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:2024-25

University:AKTU / UPTU

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Questions Asked in 2024-25

Microwave Radar Engineering (KEC074) — complete question paper · 100 marks · 3 Hours

Section AAttempt all questions in brief. 2 x 10 = 20

a
Differentiate standing wave and standing wave ratio in a waveguide. CO
b
Define microstrip transmission line. CO
c
Explain how an isolator and a c irculator vary from one another. CO
d
Give definitions for the terms directivity and coupling factor in directional couplers. CO
e
What are the limitations of conve ctional active devices at mic rowave frequency. CO
f
Write down the characteristics f or Backward Wave Oscillators. CO
g
Define the term VSWR and Return Loss. CO
h
What is dielectric constant. CO4 K2 i. What is delay line can cellers in MTI radar. CO5 K2 j. Explain the doppler effect in CW radar. CO

Section BAttempt any three of the following: 10 x 3 = 30

a
Derive the field distribution of dominant mode in rectangular waveguide. CO
b
What is directional coupler? E xplain the working principle o f 2-hole directional coupler and determine its S-matrix. CO
c
Explain the operation of a Faraday rotation isolatorwith the help of neat sketch. List the applications of ferrite isolator. CO
d
What are various methods for measuring frequency? Discuss in detail. CO
e
Draw the block diagram of the CW Radar and explain it’s working. CO

Section CAttempt any one part of the following: 10 x 1 = 10

a
Derive the expression for field components in TE mode for ci rcular waveguide. CO
b
Give the derivation for the transmission line equation and its solution. CO
a
Write short note on: i. Phase Shifters ii. Attenuators iii. Isolators
b
Explain microwave hybrid cir cuits along with its scattering matrix CO
a
With support of figures, explain the working of TWT. Also wr ite its limitations. CO
b
Explain the schematic diagram, operating principle and perfo rmance characteristics of Backward Wave Oscillators (BWO). CO
a
Discuss the salient features of microwave measurements. Desc ribe a voltage standing wave ratio (VSWR) meter. CO
b
Write short note on: i. Impedance measurement ii. Noise factor measurement
a
Draw Block diagram and expl ain the operation of MTI radar. CO
b
Derive the radar range equation. CO

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)

Give definitions for the terms directivity and coupling factor in directional couplers. CO