S-BAND RADAR

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