A loop antenna is a commonly used for

Solution (By Examveda Team)

Option A: Radar
Loop antennas are not commonly used for radar systems. Radar systems typically use high-gain antennas such as parabolic reflectors or phased arrays to achieve precise directional transmission and reception.

Option B: Direction finding
Loop antennas are widely used for direction finding. Their ability to detect the direction of an incoming signal based on variations in induced voltage makes them suitable for this application. This is a key characteristic of loop antennas.

Option C: Satellite communication
Loop antennas are not ideal for satellite communication. Satellite communication generally requires antennas with high gain and wide coverage, such as parabolic dish antennas, to handle the high-frequency signals and large distances involved.

Option D: All of the above
While loop antennas are useful for direction finding, they are not commonly used for radar or satellite communication. Thus, this option is incorrect.

Conclusion:
The correct answer is Option B: Direction finding, as loop antennas are specifically designed and effectively used for detecting the direction of incoming signals.