S- Band Radar
Nautisat S-Band A.T.C. radar antenna system is a modern off-set antenna that benefits of the most advanced techniques and software in the design.
ATC Radar
The profile reflector and the feed/polarizer system are designed with a Nautisat proprietary software. The reflector off-set profile is most innovative and it can generate side lobes of very low level. The reflector is equipped with tilting mechanism with graduated scale. The pedestal with two drive motors is designed to support the primary antenna and a large open array antenna for the secondary radar.
An RF six channels rotary joint and multi-channel slip ring permit the signal flowing the moving parts and the fixed parts. An encoder box codify the azimuth position. The antenna structure and surface are made in aluminum alloy. The pedestal is made in welded and galvanized steel with polyurethane paint. Nautisat ensure high repeatability in production and high performance and reliability.
TECHNICAL DETAILS
| PARAMETER | VALUE |
| Operating band frequencies | 2.7 – 2.9 GHz |
| Coverage
Azimuth Elevation |
360° Up to 45° in the elevation plan |
| Operation speed | Up to 15RPM |
| Polarization | Horizontally linear, circular (L/R) |
| Antenna reflector loss | 0,10 dB |
| Feed and polarizer loss | 0,05 dB |
| VSWR over the entire band | 1,35 : 1 |
| Presence of the radome | yes |
| Antenna gain | 35 ± 1 dB |
| Horizontal beam width at -3 dB | 1,39° ± 10% |
| Vertical beam width at -3 dB | 5° ± 10% |
| Side lobes level | ? 25 dB ± 1 dB |
| Slope on the horizon, at -3dB from the main peak beam | 4 to dB / deg |
| Tilt angle | -2° to +5° manually controlled |
| ICR | 20 dB |
AUX BEAM
| PARAMETER | VALUE |
| Antenna gain | 35 dB ± 1 dB |
| Horizontal beam width at -3 dB | 1,39° ± 10% |
| Vertical beam width at -3 dB | 5° ± 10% |
| Side lobes level | ? 25 dB ± 1 dB |
| Slope on the horizon, at -3dB from the main peak beam | 6 to dB / deg. |
| Squint angle between Main and Aux beams | 3° ± 0,5° |
MAIN ENVIRONMENTAL SAFE CONDITIONS:
| PARAMETER | VALUE | |
| Temperature range | -40°C ÷ + 70°C | |
| Humidity | Up to 100% | |
| Operative in rain conditions | 4 ÷ 102 mm per hour | |
| Solar radiation | ? 360 BTU / hr / ft ² (1135 Watts / m²) | |
| Wind conditions | Operating | Survival |
| Without ice | 133 KNTS | 178 KTNS |
| With ice | 93 KNTS | 124 KNTS |