Question 1

What types of satellite antennas does Celestia TTI offer?

Accepted Answer

Celestia TTI provides a comprehensive range of satellite antenna systems including parabolic reflector antennas (1.2m to 13m diameter), multi-band feed systems, tracking antenna pedestals, and VSAT terminals. Applications include fixed earth stations, transportable terminals, maritime and airborne satcom, and radio astronomy installations.

Question 2

How do I choose the right antenna size for my satellite link?

Accepted Answer

Antenna size selection depends on the satellite link budget requirements: operating frequency band, required data rate, satellite EIRP, and acceptable availability. Higher frequency bands (Ka-band) need larger antennas for the same gain as lower bands (C-band). A link budget analysis considering rain fade margins, required Eb/No, and system noise temperature determines the minimum antenna diameter.

Question 3

What is antenna G/T and why is it important?

Accepted Answer

G/T (Gain-to-noise-Temperature ratio) is the key figure of merit for a satellite receive earth station, measured in dB/K. It combines antenna gain and system noise temperature into a single parameter that determines receive sensitivity. Higher G/T values enable reception of weaker signals, supporting higher data rates or smaller satellite transponder bandwidth allocation.

Question 4

What tracking systems are available for satellite antennas?

Accepted Answer

Celestia TTI antenna tracking systems include step-track (for geostationary satellites), monopulse and pseudo-monopulse tracking (for LEO/MEO satellites), program track using orbital elements (TLE), and combined tracking modes. Tracking accuracy of 0.02° or better ensures optimal signal reception even with inclined orbit satellites.

Antennas

Phase arrays

Phase array antenna systems for multi aatellite tracking

Flat panels

Manpacks, satcom on the move, satcom on the pause & airborne applications

Passive RF

Manpacks, satcom on the move, satcom on the pause & airborne applications

Quality Certifications & Standards