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B.Tech.(ECE)/(ETE) (2011 Onwards)/
(Electronics Engg.) (2012 Onwards)

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ELECTROMAGNETICS AND ANTENNAS
Subject Code : BTEC-403
M.Code: 57595
Max. Marks : 60

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INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

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1. Answer briefly :
   1. Write the wave equation for free space propagation.
   2. What is waveguide? What is its importance and applications?
   3. Differentiate between ordinary end fire array and Hansen-wood yard end-fire antenna.
   4. Define Babinet's principle.
   5. What is the significance of Poynting theorem?

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   6. What is propagation constant?
   7. Define Retarded Vector and scalar potential.
   8. Define Radiation Pattern of an antenna.
   9. Define Maximum Usable Frequency.
   10. Define Skip Distance.

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SECTION-B

2. Explain and derive the general solution of transmission line terminated with any load impedance.
3. Derive the expression for direction of pattern maxima and minima for array n isotropic sources of equal amplitude and spacing (for broadside).
4. What is distortion less transmission line? Derive the expression for the distortion less condition.

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5. Describe the mapping of constant resistance and constant reactance circle on reflection coefficient plane.
6. Derive relation between E and H in uniform plane wave propagation.

SECTION-C

7. Explain the concept of polarisation. What are the conditions for different types of polarisation?
8. Explain the structure of atmosphere. Discuss the range of space wave propagation.

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9. Discuss the construction and operation of paraboloid reflector antenna.

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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