1. space diversity
2. frequency diversity
3. a broad band antenna
4. a more directional antenna
frequency diversity
1. generator
2. transformer
3. regulator
4. reflector
transformer
1. region outside the antenna region
2. region within the antenna region
3. region around the antenna tower
4. none of the above
region outside the antenna region
1. along the dipole axis
2. along perpendicular direction
3. along the dipole axis as well as perpendicular direction
4. neither along the dipole axis nor along the perpendicular direction
along the dipole axis
1. Closed transmission line
2. shorted transmission line
3. earthed transmission line
4. opened-out transmission line
opened-out transmission line
1. absorbed by the F2 layer
2. reflected by the D layer
3. affected by the solar cycle
4. none of the above
affected by the solar cycle
1. 1,2 and 3
2. 1 and 2
3. 2 and 3
4. 1 and 3
2 and 3
1. Equal to the resonance frequency
2. Less than the resonance frequency
3. Greater than the resonance frequency
4. Not zero
Greater than the resonance frequency
1. small height antenna directly mounted on jeeps, ships, etc.
2. the towers or masts which are used as radiators
3. the towers or masts which are not used as radiators
4. supports for antenna conductors
the towers or masts which are not used as radiators
1. -8 to +8
2. -7 to +7
3. -16 to +16
4. none of these
-16 to +16