1. 2f0
2. Still f0
3. f0/4
4. f0/2
f0/2
1. radar systems
2. television broadcast systems
3. commercial radio broadcast systems
4. none of these
radar systems
1. A B C.
2. A + B + C
3. A ⊕ B ⊕ C
4. A B ? C
A + B + C
1. Two-phase device
2. 3-phase ac device
3. Dc device
4. Single-phase ac device
Single-phase ac device
1. Constant value
2. Linearly increasing voltage
3. An ideal impulse
4. Exponentially increasing voltage
An ideal impulse
1.
2.
3. AB + CD +EF
4. (A + B) (C + D) (E + F)
AB + CD +EF
1. same as its directive gain
2. directive gain expressed in decibels
3. the maximum value of its directive gain
4. none of the these
the maximum value of its directive gain
1. AND – AND.
2. OR – OR
3. AND – OR
4. OR – AND
AND – OR
1. 5 volt source in series with 10 resistor
2. 1 volt source in series with 2.4? resistor
3. 15 volt source in series with 2.4? resistor
4. 1 volt source in series with 10? resistor
1 volt source in series with 2.4? resistor
1. average radiated power to the radiated power in a given direction
2. radiation intensity in a given direction to that of the radiation intensity in the same direction due to a hypothetical isotropic radiator that radiates the same total power
3. radiation intensity in a given direction due to a hypothetical isotropic radiator to the radiation intensity in the same direction due to the actual antenna
4. none of these
radiation intensity in a given direction to that of the radiation intensity in the same direction due to a hypothetical isotropic radiator that radiates the same total power