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| Roll No. | Total No. of Questions : 09 |
| Time: 3 Hrs. | Total No. of Pages : 02 |
B.Tech.(ECE)/(ETE) (2011 Onwards)/
(Electronics Engg.) (2012 Onwards)
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(Sem.-4)ELECTROMAGNETICS AND ANTENNAS
Subject Code : BTEC-403
M.Code: 57595
Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
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- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
SECTION-A
- Answer briefly :
- Write the wave equation for free space propagation.
- What is waveguide? What is its importance and applications?
- Differentiate between ordinary end fire array and Hansen-wood yard end-fire antenna.
- Define Babinet's principle.
- What is the significance of Poynting theorem?
- What is propagation constant?
- Define Retarded Vector and scalar potential.
- Define Radiation Pattern of an antenna.
- Define Maximum Usable Frequency.
- Define Skip Distance.
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SECTION-B
- Explain and derive the general solution of transmission line terminated with any load impedance.
- Derive the expression for direction of pattern maxima and minima for array n isotropic sources of equal amplitude and spacing (for broadside).
- What is distortion less transmission line? Derive the expression for the distortion less condition.
- Describe the mapping of constant resistance and constant reactance circle on reflection coefficient plane.
- Derive relation between E and H in uniform plane wave propagation.
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SECTION-C
- Explain the concept of polarisation. What are the conditions for different types of polarisation?
- Explain the structure of atmosphere. Discuss the range of space wave propagation.
- Discuss the construction and operation of paraboloid reflector antenna.
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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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