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 | June, 2015 | |
City, State | new delhi, |
Question Paper
Explain the following
Radiation pattern
Antenna height
Beam efficiency
What is the difference between directivity and gain of the antenna Relate gain and directivity of the antenna.
Derive the Electric field expression for the array of two-isotropic point sources with same amplitude and phase.
Find the location of the first nulls on either side of the beam center for linear array of 80° in phase elements, fed with equal amplitude current, which are A/2 apart.
Explain the principle of pattern multiplication.
What is antenna array What specific properties does it have that make it so useful at high frequency?
What is the· radiation resistance of an antenna? What do you mean by far-field of the antenna?
Find the directivity of a paraboloid reflector antenna having illumination efficiency of 0·65, reflector diameter of 5 m and operating frequency of 10 GHz.
Write a short note on folded dipole antenna.
At what distance does the radiation component of magnetic field become twice the induction component?
Explain the principle of equality of path length in horn antenna.
Write the formulae for electric and magnetic field components of short dipole.
How is loop antenna used for direction finding? Explain briefly.
A paraboloid reflector is required to have a power gain of 2,500 at an operating frequency of 9 GHz. Determine the diameter of the aperture and half power beam width of the antenna.
Explain the operation of log-periodic antenna with constructional detail.
Draw and explain the different components of Yagi-Uda antenna.
9. Derive the expression for the refractive index of the ionosphere. Find the maximum electron density of the ionosphere layer corresponding to refractive index of 0·65 at the frequency of 12 MHz.
10. Write short notes on any two of the following:
Tropospheric Scatter
Turnstile Antenna
Effect of Earth's magnetic field on the ionospheric propagation
Radiation pattern
Antenna height
Beam efficiency
What is the difference between directivity and gain of the antenna Relate gain and directivity of the antenna.
Derive the Electric field expression for the array of two-isotropic point sources with same amplitude and phase.
Find the location of the first nulls on either side of the beam center for linear array of 80° in phase elements, fed with equal amplitude current, which are A/2 apart.
Explain the principle of pattern multiplication.
What is antenna array What specific properties does it have that make it so useful at high frequency?
What is the· radiation resistance of an antenna? What do you mean by far-field of the antenna?
Find the directivity of a paraboloid reflector antenna having illumination efficiency of 0·65, reflector diameter of 5 m and operating frequency of 10 GHz.
Write a short note on folded dipole antenna.
At what distance does the radiation component of magnetic field become twice the induction component?
Explain the principle of equality of path length in horn antenna.
Write the formulae for electric and magnetic field components of short dipole.
How is loop antenna used for direction finding? Explain briefly.
A paraboloid reflector is required to have a power gain of 2,500 at an operating frequency of 9 GHz. Determine the diameter of the aperture and half power beam width of the antenna.
Explain the operation of log-periodic antenna with constructional detail.
Draw and explain the different components of Yagi-Uda antenna.
9. Derive the expression for the refractive index of the ionosphere. Find the maximum electron density of the ionosphere layer corresponding to refractive index of 0·65 at the frequency of 12 MHz.
10. Write short notes on any two of the following:
Tropospheric Scatter
Turnstile Antenna
Effect of Earth's magnetic field on the ionospheric propagation
Other Question Papers
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