X-Band EOS System > Antenna Options

Radome removed from land-based antenna to show 1.5m parabolic dish antenna, scalar feed horn and LNB

Radome removed from land-based antenna to show 1.5m parabolic dish antenna, scalar feed horn and LNBRadome removed from land-based antenna to show 1.5m parabolic dish antenna, scalar feed horn and LNB

Marine antenna on Peruvian Polar Research Ship BAP Carrasco

Marine antenna on Peruvian Polar Research Ship BAP Carrasco
Marine antenna on Peruvian Polar Research Ship BAP Carrasco

The antenna can be supplied in land-based or marine variants. Both use the same radome, dish antenna and RF components.

Land-based antenna

  • High-speed dual-axis antenna rotator (elevation over azimuth).
  • Dartcom XPA rotator controller with PID function and closed-loop feedback for excellent pointing accuracy and smooth tracking.
  • Automatically controlled via a serial data link from the ingest PC by the Dartcom Polar Orbiter Ingester software.
Land-based antenna rotator specifications
Control Dual-axis PID controller with closed-loop feedback
Movement limits 0–360° azimuth
0–180° elevation
Speed 48°/sec azimuth
10°/sec elevation
Mechanical tolerance ±0.15°
Tracking accuracy ±0.1°
Weight 186kg (including radome)
Operating temperature –20°C to +60°C unheated
–40°C to +60°C with optional heater
Survival temperature –35°C to +75°C

Marine antenna

  • Active-stabilised pedestal to compensate for pitch, roll and yaw.
  • X-Y with continuous movement to eliminate cable wrap problems without needing slip-rings or a rotary joint.
  • Automatically controlled via a TCP/IP link from the ingest PC by the Dartcom Polar Orbiter Ingester software.
  • Waveguide bandpass filter fitted between the scalar feed horn and LNB to prevent interference and damage from X-Band radar.
Marine antenna pedestal specifications
Control X-Y controller with active stabilisation
Movement limits None (continuous)
Vessel motion:  
    Roll ±30° @ 8 sec
    Pitch ±15° @ 8 sec
    Yaw ±80° @ 50 sec
    Surge ±0.2g
    Sway ±0.2g
    Heave ±0.2g
    Turning rate 10°/sec
Weight 180kg (including radome)
Power requirements 110/220V AC (±5%)
50/60Hz (+0, –3%)
660W
Wild heat 660W
Operating temperature –10°C to +70°C unheated
–40°C to +70°C with optional heater
Survival temperature –35°C to +75°C
Humidity 95% @ 40°C
EMI/RFI MIL-STD-461
Vibration Designed to meet MIL-STD-167-1
Shock Designed to meet MIL-STD-901
Marine antenna radar filter specifications
Passband 7750–8400MHz
Insertion loss at band edges 0.25dB maximum
VSWR 1.2:1 maximum
Rejection from 9300–9500MHz 100db minimum
Operating temperature –10°C to +50°C

Indoor Equipment

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