# Past Guess Paper of Antenna & Wave Propagation.

Past Guess Paper of Antenna & Wave Propagation.

## Guess Paper 1 : Antenna & Wave Propagation Past Papers

University Name – Confidential

NOTE: Q.1 is compulsory, attempt any four questions from the remaining. All questions carry equal marks. Phones and other Electronic Gadgets are not allowed.

Time Allowed: 3 hours

Examination:   Final, Fall – 2020

Total Marks:    70, Passing Marks (35)

Q.1      Fill right word in the blanks.                                                                                     [14]

1. In transverse electromagnetic waves, electric and magnetic fields are……………… to each others.
2. Impedance matching are performed in antennas for ……………. Power transfer.
• Antennas are use for ……………… communication.
1. Isotropic antenna radiate ……………… power in all directions.
2. For TV ………………… antennas are use.
3. When the frequency of signal increases, the size of antenna ………………
• LNB stand for…………………..

Q.2      What is transverse electromagnetic wave, explain in detail with the help of diagram and electric, magnetic field relation.                                                                                                   [14]

3 a.What is polarization, for which purpose polarization is performed

b.Explain vertical polarization of waves with the help of diagram.                           [07, 07]

4 What is radiation pattern, explain the radiation pattern of directional antenna with the help of diagram. [14]

Q.5      a.What is directivity of an antenna, explain with its mathematical equation.

b.What are the advantages and disadvantages of antenna field patterns multiplication?                                                                                                                                                   [07, 07]

Q.6      a.What are parasitic arrays, explain with the help of diagrams.

b.In which situation and places loop antennas are use, give at least five examples.   [07, 07]

Q.7      Write short notes on any two of the following:                                                        [07, 07]

1. Quality factor and bandwidth of an antenna.
2. Field strength measurement of an antenna.
3. Turnstile antenna