MILSTAR is a primary system for which frequency band?

• A. Extremely High Frequency
• B. Very Low Frequency
• C. High Frequency
• D. Ultra High Frequency

Answer: (A)

MILSTAR is built around protected, jam-resistant communications in the Extremely High Frequency band. Operating in the EHF range (roughly 30 to 300 GHz) enables very wide bandwidth and high data rates, while producing highly directional, narrow beams that are hard to jam and difficult to intercept. This design supports secure space-to-ground and between-satellite links with advanced encryption and frequency-hopping. Other bands exist for different needs—Very Low Frequency for submarine communications, High Frequency for long-range but more susceptible to ionospheric effects, and Ultra High Frequency for less protected, more ubiquitous links—but MILSTAR’s primary, most capable, high-security links sit in the EHF band.