The DSCS and WGS satellite constellations operate in which frequency spectrum?

• A. UHF
• B. VHF
• C. EHF
• D. SHF

Answer: (D)

The main idea is recognizing where military satellite communication links sit in the radio spectrum. DSCS and WGS are built for high data-rate, line-of-sight links, so they operate in the Super High Frequency range, roughly 3 to 30 GHz. In practice, their primary user links sit in the X-band portion of SHF, which provides the right balance of antenna size, atmospheric performance, and bandwidth for space-to-ground communications. Lower bands like UHF and VHF don’t offer the same data throughput, while much higher bands in the EHF region would require more complex, weather-sensitive, and higher-pointing systems. So these constellations rely on SHF for their satellite links.