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8 Axis Robotic Antenna Measurement System (RAMS) 30 " ( 760 mm) max AUT Dimension


The NSI-900R-10 8-Axis Robotic Scanner is an ideal system for measuring antennas up to 30 inches (760 mm) in diameter. It is well suited to perform testing of high, medium and low gain antennas, since it offers PNF, CNF and SNF capabilities. The NSI-900R-10 uses a 6-axis precision robotic arm that acts as Y-axis for PNF & CNF and Theta-axis for SNF acquisitions. The 900R-10 also uses an NSI-SC-5838 (500 mm dia) rotation stage that is used as a Phi-axis for CNF and SNF acquisitions. This stage can support AUT loads of up to 10,000 lb (4,500 kg). The 900R-10 also uses an NSI-SC-5628 precision linear translation stage that is used as an X-axis for PNF acquisition and robot repositioning.


The RAMS system allows for CNF and SNF testing with adjustable probe radii and PNF testing with different AUT to probe separations. It also allows for PNF testing where the scan plane can be vertical or horizontal and is therefore ideal for custom measurement applications. The system interfaces with a wide variety of RF equipment and is capable of measuring amplitude and phase patterns from C-band to mm-Wave Bands. The system software runs on an Intel based measurement workstation and provides automatic setup of scans based on measurement parameters and desired output. Measured data can be processed for far-field or holographic patterns yielding complete characterization of the antenna's performance. A single data set provides information on antenna gain, side lobe structure, beam pointing and cross polarization.

  • PNF Scan Area (nominal): 8' x 4' (2.4 m x 1.2 m)
  • CNF Scan Height (nominal): 4' (1.2 m) Radius: 40" (1 m)
  • SNF Scan Area: 360 in Phi and 165 in Theta Radius: 40" (1 m)
  • C-band to mm-Wave frequencies
  • High accuracy positioners
  • Automatic electronic SNF alignment capability (link)
  • Complete 3D characterization
  • Far-field, Holographic and Near-field patterns

Construction 8-Axis system comprised of 6-Axis robotic arm with precision X-axis translation stage and Phi-axis rotation stage 
Drive System Precision Stepper Motor & Servo with Absolute Encoder
PNF Scan Area (nominal) 8' x 4' (2.4 m x 1.2 m)
CNF Scan Height (nominal) 4’ (1.2 m) Radius: 40” (1 m)
SNF Scan Area 360° in Phi and 165° in Theta with 40” (1 m) Radius
Maximum Antenna Load 10,000 lb (4,500 kg)
Maximum Antenna Diameter: 30 in (760 mm)
System Controller NSI controller with Ethernet interface
Measurement Workstation Measurement workstation computer with large LCD monitor
Scanner Absorber Absorber Kit 3" pyramidal cone & Flat
Probe Open-ended Waveguide Probe(s) or optional broadband single or dual pol probe antennas
RF Cables 20 GHz RF Cables
Rotary Joints Qty. 2 - DC-26.5 GHz, (Phi, Pol)
Supported RF Devices NSI Panther Receiver Subsystem or selection of Keysight, Rohde & Schwarz and Anritsu VNA's (contact NSI for a complete list)
Power 100-240 VAC switchable, 50/60 Hz, 500 watts


  • Width - 10' (3m)
  • Depth - 10' (3m)
  • Height - 10' (3m)
  • Weight - 1,000 lb (500 kg)

  • No additional links are currently available.

Please contact the NSI Sales department to order this product.

Nearfield Systems, Incorporated
19730 Magellan Drive, Torrance, CA 90502, USA, Tel: 310.525.7000, Fax: 310.525.7100
Email: sales@nearfield.com. Visit our website: www.nearfield.com