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108' x 52' (33 m x 16 m) Vertical Planar Near-field Measurement System


The 400V-108x52 is an ideal system for measuring medium and high gain antennas (>15 dBi) with large apertures, making it suitable for testing large arrays or reflector antennas. The 400V-108x52 is based on a inverted "T" design and is constructed of steel. For high stability a cross-braced dual-rail steel I-beam base is used. This robust design is easy to maintain and align, and highly accurate. The high capacity probe carriage accommodates probes as low as WR1500 including optional roll and Z stages.


The system interfaces with a wide variety of RF equipment and is capable of measuring amplitude and phase patterns from L-band to mmWave bands. The system includes NSI Antenna Measurement Software.

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.

The 400V-108x52 can be supplied with a variety of options and can be upgraded to allow for cylindrical or spherical measurements to expand system utility.

  • High accuracy planarity <0.020" (0.50 mm) RMS
  • 108' x 52' (33 m x 16 m) scan area
  • Precision rack and pinion drive
  • L-band to sub-mmWave measurements
  • Inverted "T" frame design for high accuracy
  • Far-field, Near-field and Holographic patterns
  • Cylindrical and Spherical options available

Construction Inverted "T" Frame (steel)
Drive System Precision Stepper Motor; Rack and Pinion Drive
Scan Area 108' x 52' (33 m x 16 m)
Planarity <0.020" (0.50 mm) RMS
Corrected Planarity (Requires optional Structure Correction Software and Probe Translation Stage) <0.008" (0.2 mm) RMS
Resolution (x, y) x: 0.001" (0.025 mm)
y: 0.0015" (0.0375 mm)
Position Repeatability 0.002" (0.05 mm) RMS
Scan Speed x: 8 in/s (0.2 m/s)
y: 10 in/s (0.25 m/s)
Probe Carriage Capacity 175 lb (79.5 kg) maximum recommended; WR1500
System Controller NSI controller with serial and parallel I/O interfaces
Measurement Workstation Measurement workstation computer with large LCD monitor
Stepper Motor Power Amplifier EIA 19" rack mount (7" high x 14" deep)
Motor Cables Quick-connect; 40' (12 m); connectors on tower base
Scanner Absorber Tower Absorber Kit (24” pyramidal cone)
Probe Optional See our list of standard Open Ended Waveguide (OEWG) Probes
Probe Mount Angle Bracket - allows mounting probe in "V" or "H" orientation
RF Cables 20 GHz RF Cables
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, 800 watts


  • Width - 1530" (38.9 m)
  • Depth - 153" (3.9 m)
  • Height - 718" (18.2 m)
  • System Weight - 67,700 lb. (30,700 kg) approx
  • No additional links are currently available.

NSI-400V-108X52 - 108' x 52' (33 m x 16 m) scanner system including X-Y stepper motor driven scanner with dual steel beam base, motor cable set, controller, PC based measurement workstation, motor drive electronics, NSI antenna measurement software, installation tool kit, system documentation and operation manual.


Opt 100 - 220VAC 50 Hz Operation
Opt 101 - European Version
NSI-SC-5621E - Probe Translation Stage, Extra Heavy Duty, 10 inch (250 mm) Travel
NSI-SC-5631 - Probe Roll Stage (High Capacity) with 26.5 GHz rotary joint
NSI-SW-5301 - Upgrade NSI Standard Edition Software to Professional
NSI-SW-5105 - Motion Tracking Interferometer (MTI) Software

For additional options and information see Scanner Options and Accessories

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