The angle in degrees between the half power points of an antenna radiation pattern is referred to as which term?

The term that describes the angle in degrees between the half power points of an antenna radiation pattern is known as beamwidth. This concept is critical in understanding how antennas radiate energy and receive signals. Beamwidth specifically reflects the angular width of the beam where the antenna delivers 50% of its maximum power, which is often referred to as the -3 dB point.

Understanding beamwidth is essential for evaluating antenna performance, as it influences the coverage area and directionality of the antenna. A narrower beamwidth typically indicates a more focused antenna that can direct energy over longer distances, while a wider beamwidth signifies a broader coverage area but potentially reduced directivity.

The other terms listed, such as scan time, scan type, and scan rate, pertain to different aspects of electronic warfare and radar systems, but they do not describe the angular separation related to the power levels of an antenna's radiation pattern. Therefore, beamwidth is the correct term to use in this context.