D2APA Direct Drive Antenna Pointing Assembly

The D2APA is a direct drive actuated K-band antenna pointing assembly, with elevation over azimuth configuration, compatible with GEO and LEO orbits and engineered for long-life missions where fast and accurate pointing is required. The modular approach allows the customization of operating band (K, X, and dual X/K band) and antenna diameter up to 350mm.

It is part of SENER Aeroespacial Inter-Satellite and Earth Observation Datalink Subsystems as K-band Antenna Assembly. It has been engineered in accordance with ESA’s ECSS standards, providing unparallel reliability and performance.

• In-house designed 0.2°/step direct drive motor (smaller resolution with micro-stepping)
• In-house designed rotary joint (Customizable frequency of operation)
• Mass: < 9.5 kg
• Low driving current: 300 mA
• Power consumption: < 5.5 W/axis (Worst Case)
• Up to 5 discrete fine position sensors per axis
• Optional potentiometer sensors
• Full hemispherical coverage (>360° azimuth range)
• Low shock HDRM
• Low exported micro-vibrations
• Rapid position recovery: up to 13°/s rotation speed
• Dimensions: stowed Ø390 mm x 390 mm (with Ø350 mm antenna)
• Available at other frequency bands (K, X and dual X/K band rotary joints and antennas)
• Fully compatible with ground tests without zero-g devices