Antenna Characteristics Online Exam Quiz
Antenna Characteristics GK Quiz. Question and Answers related to Antenna Characteristics. MCQ (Multiple Choice Questions with answers about Antenna Characteristics
Find the effective area of a half-wave dipole operating at frequency 100MHz and directive gain 1.8?
Options
A : 1.28m2
B : 2.18m2
C : 0.128m2
D : 12.8m2
If beam width of the antenna increases, then directivity __
Options
A : Decreases
B : Increases
C : Remains unchanged
D : Depends on type of antenna
If the reflection co-efficient is ? then emissivity is ___
Options
A : 4-Mar
B : 4-Jan
C : 2-Jan
D : 2-Mar
Overall receiver noise temperature expression if T1, T2? are amplifier 1, 2, and so on noise Temperature and G1, G2, and so on are their gain respectively is___
Options
A : T = T_1+\frac{T_2}{G_1}+\frac{T_3}{G_1 G_2}+?
B : T = T1+T2 (1-G1)+T3(1-G1G2)+?
C : T = T_1+\frac{T_2}{(1-G_1)}+\frac{T_3}{(1-G_1 G_2)}+?
D : T = T1+T2 (G1)+T3(G1G2)+?
Relation between brightness temperature TB and physical body temperatureTp is __
Options
A : TB=(1-\mid\Gamma_s \mid^2) T_p
B : TB=T_p/(1-\mid\Gamma_s \mid^2)
C : TB=(1-\mid\Gamma_s \mid)T_p
D : TB=(1-\mid\Gamma_s \mid)^2 T_p
The angular distance between two successive nulls of main lobe is called as __
Options
A : FNBW
B : HPBW
C : Beam width
D : FBR
The receiving antenna is designed to have __ side-lobe-ratio and __ SNR.
Options
A : Low, high
B : High, high
C : Low, low
D : High, low
Total noise power of the system is P=___
Options
A : k(TA+TR)B
B : k(TA+TR)/B
C : k(TR)B
D : kB/Tsys
Which of the following option is false?
Options
A : Omni-directional antenna is a special case of directional antenna
B : Directional antenna radiates power effectively in particular directions compared to other directions
C : Isotropic antenna radiates power in all directions
D : End-fire array antenna has its main beam normal to the axis containing antenna