Which scan type is produced by moving a feed horn of a parabolic antenna in a tight circle about the center of the stationary dish?

The scan type produced by moving the feed horn of a parabolic antenna in a tight circle around the center of the stationary dish is known as a conical scan. In conical scanning, the feed horn describes a circular path, which allows for continuous detection and tracking of a target. This type of scan is particularly effective in maintaining radar contact because it continually samples the target area, providing updates on the target's position and characteristics.

In contrast to other scan types, which may remain stationary or only change direction in a more linear fashion, conical scanning enables a circular sweep around a reference point. This capability is essential in dynamic tracking environments, where targets may be moving rapidly or unpredictably. The angle of the conical scan can also be adjusted based on the system requirements, ensuring that the target remains illuminated by the radar's signal throughout the scanning process, contributing to improved accuracy and reliability in tracking.

Understanding this mechanism is vital in electronic warfare applications as it informs how radar systems can adapt to various operational scenarios, enhancing their ability to detect and engage with targets effectively.