Horn antennas are used for which satellite programs according to the material?

• A. MILSTAR.
• B. MUOS.
• C. GPS.
• D. DSCS and WGS.

Answer: (D)

Horn antennas are a practical choice when you need a rugged, broadband, high-gain radiator for military satellite links. In the material, DSCS and WGS are the programs that use horn antennas because their ground terminals and feeder links benefit from the wide bandwidth and predictable, directive performance a horn provides in the high-frequency bands these systems use. Programs like GPS rely on compact patch or other antenna types designed for receiver practicality and size, MUOS uses phased-array beams for flexibility, and MILSTAR employs different antenna configurations suited to its mission profiles. So, the association emphasized in the material is DSCS and WGS.