High performance radar antenna systems and microwave sensors
CHL radar antenna systems
meet your requirements

Antenna Turning Unit type ST1

Type Gearbox
Applicable antenna types Radar Antenna families 18 - 22 ft
Maximum Antenna weight 300 kg
Rotational speed antenna shaft (fixed) Available in the range from 10 to 60 rpm
Motor type 3-phase, 4,6 or 8-pole, squirrel cage
Power supply 230/400 VAC or 400/690 VAC
Motor power 0,75 up to 4 kW (optional)
Lubrication Synthetic oil and grease
Environmental temperature range -25 to +50°C
Sound pressure level < 60 dBA (at 20 rpm)
Weight including oil Approx. 140 kg
(180 kg including support)
Dimensions Ø 680 x 1020 mm (including support)

Standard features

  • One-channel rotary joint for X-band with through-going shaft
  • Single channel rotary shaft encoder with 4096 azimuth count pulses
  • Time Between Overhaul 6 years

Available options

  • Cylindrical support for platform mounting of the Antenna Turning Unit
  • Spark subassembly for integrated lightning protection
  • Anti-vibration and noise suppressing mounting ring
  • Frequency inverter with integrated soft starter for speed control and smooth starting and stopping
  • Single channel rotary encoder with 8192 azimuth count pulses
  • Dual rotary shaft encoder assembly (tandem encoder)
  • Antenna tiltring fixed or adjustable up to 10 °C
  • Cold weather package for temperatures down to -40°C
Datasheets available upon request.



marketing@chl.nl | T +31 (0) 71 402 55 14
Copyright CHL Netherlands B.V. 2023