Exam Details

Subject Antennas and Propagation
Paper
Exam / Course BTCVI / BTECVI / BTELVI
Department School of Engineering & Technology (SOET)
Organization indira gandhi national open university
Position
Exam Date December, 2016
City, State new delhi,


Question Paper

Differentiate between directive gain and directivity of an antenna. Establish the relation <img src='./qimages/8812-1a.jpg'>, where the symbols have their usual meaning. Prove that the radiation field of a half-wave radiator is zero in the direction of its axis. Sketch its radiation diagram.

2. Discuss the condition under which an array of antenna will behave either as a broadside array or an end-fire array. Derive the necessary expression.

3. Assuming the earth to be a perfect conductor, deduce an expression for the electric field intensity of the radiation field at a point r metres away from a short vertical antenna. Show that the power radiated by it is <img src='./qimages/8812-3.jpg'> <br><br>

4. Describe how a loop antenna can be used for direction finding of an incoming EM wave. Derive an expression for the induced voltage in the loop.

5. Discuss the theory of operation of a log periodic antenna. Show that it is a frequency independent antenna.

6. Explain the parabolic reflector type antenna with Cassegrain feed. Also mention its advantages and disadvantages.

7.(a) Describe the slotted line technique for impedance measurement. Describe the 3-element method for gain measurement.

8. Explain why the ratio of lower frequency limit to maximum usable frequency for establishing radio communication in the SW band is generally smaller at night than in the day time.

9. Bring out the important differences between ground-wave, space-wave and ionospheric propagation of radio waves, indicating their application areas.

10. Write short notes on any two of the following: Babinet's Principle and Complementary Antennas Microstrip Patch Antennas Electrical Properties of Ionosphere


Departments

  • Centre for Corporate Education, Training & Consultancy (CCETC)
  • Centre for Corporate Education, Training & Consultancy (CCETC)
  • National Centre for Disability Studies (NCDS)
  • School of Agriculture (SOA)
  • School of Computer and Information Sciences (SOCIS)
  • School of Continuing Education (SOCE)
  • School of Education (SOE)
  • School of Engineering & Technology (SOET)
  • School of Extension and Development Studies (SOEDS)
  • School of Foreign Languages (SOFL)
  • School of Gender Development Studies(SOGDS)
  • School of Health Science (SOHS)
  • School of Humanities (SOH)
  • School of Interdisciplinary and Trans-Disciplinary Studies (SOITDS)
  • School of Journalism and New Media Studies (SOJNMS)
  • School of Law (SOL)
  • School of Management Studies (SOMS)
  • School of Performing Arts and Visual Arts (SOPVA)
  • School of Performing Arts and Visual Arts(SOPVA)
  • School of Sciences (SOS)
  • School of Social Sciences (SOSS)
  • School of Social Work (SOSW)
  • School of Tourism & Hospitality Service Sectoral SOMS (SOTHSM)
  • School of Tourism &Hospitality Service Sectoral SOMS (SOTHSSM)
  • School of Translation Studies and Training (SOTST)
  • School of Vocational Education and Training (SOVET)
  • Staff Training & Research in Distance Education (STRIDE)

Subjects

  • Advance Microprocessor And Architecture
  • Analog and Mixed Mode VLSI Design
  • Analog Communication
  • Analog Electronic Circuits
  • Analog Integrated Circuits Design
  • Antennas and Propagation
  • B10-Informatics
  • Basics Of Electronics Engineering
  • Computer Architecture
  • Computer Communication Networks
  • Control Engineering
  • Data Communication And Network
  • Device Modelling For Circuit Simulation
  • Digital Electronics
  • Digital Signal Processing
  • Digital System Design
  • Electromagnetic Field Theory
  • Electronic Measurement and Inst
  • Electronic Switching Circuits
  • Embedded System Design
  • Information Theory And Coding
  • Linear Integrated Circuits
  • Microcontrollers
  • Microprocessor And Its Applications
  • Microwave And Radar Engineering
  • Multirate Systems
  • Optical Fiber Communication
  • Power Electronics
  • Satellite And Tv Engineering
  • Signal And Systems
  • Wireless Communication