AMM QUIZ1

Sterdian is a measurement unit of __________

• Point angle
• Linear angle
• Plane angle
• Solid angle

Which among the following defines the angular distance between two points on each side of major lobe especially when the radiation drops to zero?

• Half power beam width (HPBW)
• First null beam width (FNBW)
• Side lobe level (SLL)
• Front to back ratio (FBR)

Which pattern is generated due to plotting of square of amplitude of an electric field?

• Field Pattern
• Voltage Pattern
• Power Pattern
• All of the above

If an observation point is closely located to the source, then the field is termed as ________

• Induced
• radiated
• reflected
• farfield

A __________ is a device that converts a guided electromagnetic wave on a transmission line into a plane wave propagating in free space.

• Transmitting antenna
• Receiving antenna
• Radar
• Mixer

Antennas convert ----------------------to-------------------

• Photons to electrons
• electrons to photons
• Both a and b
• none

Which of the following is true

• a) Time changing current radiates
• accelerated charges radiates
• Both a and b
• None

Radiation pattern is ---------------- dimensional quantity

• Two
• Three
• Single
• None

------------- is also called as 3-dB bandwidth

• FNBW
• HPBW
• Both A and B
• None

The minimum value of the directivity of an antenna is……

• Unity
• Zero
• Infinite
• None