Antenna and Wave Propagation

MEENAKSHI SUNDARARAJAN ENGINEERING COLLEGE
DEPARTMENT OF ECE
EC2353-ANTENNAS AND WAVE PROPAGATION
QUESTION BANK

UNIT – I

PART – A

1. What is retarded current?

2. Define hertzian dipole.

3. Define antenna gain.

4. What are the two types of radiation pattern?

5. State reciprocity principle.

6. Define antenna temperature.

PART – B

1. Derive the expression for calculation of electromagnetic field due to an alternating current element.

2. Explain how the solutions to wave equations are arrived?

3. (i)Derive the relationship between directivity & effective aperture.

(ii)State and prove reciprocity principle with regard to antenna.

4. What are the various types of apertures? Find the effective aperture of a dipole antenna.

5. Explain the following

(i)Vector effective length

(ii)Antenna temperature

6. Write short notes on

(i)Equivalence of radiation pattern

(ii)Equivalence of impedances

UNIT – II

PART – A

1. Define antenna array.

2. Define broadside array.

3. Define end fire array.

4. Define the principle of pattern multiplication

5. Name & draw the different shapes of loop antenna?

6. What are the field components of loop antenna?

PART – B

1. Derive the expression for radiation resistance of half wave dipole?

2. Deduce an expression for the radiation pattern of a broadside array with two point sources.

3. Deduce an expression for the radiation pattern of an end fire array having two point sources.

4. Derive the expression for the normalized field pattern of uniform linear array.

5. What are the four types of amplitude distribution in arrays with non-uniform excitation and explain binomial array.

6. Explain the principle of pattern multiplication with two examples.