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40' x 30' (12.2 m x 9.1 m)  Horizontal Planar Near-field Measurement System


The 500H-40x30 is an ideal system for measuring large aperture antennas with medium to high gain (>15 dBi) making it suitable for testing larger arrays or reflector antennas that require a zenith orientation for testing. The 500H-40x30 is based on an "H" frame design and is constructed using two reinforced steel X rails that support a stiff yet light weight Y-bridge on precision bearing rails. The high capacity probe stage can accommodate various probes from L to mmWave band including any necessary RF equipment, probe extensions and 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 beam pointing and cross polarization. The model 500H-40x30 can be supplied with a variety of options and can be upgraded to allow for vertical planar measurements to expand system performance.

  • High Accuracy - Uncorrected Planarity
    < 0.010" (0.250 mm) RMS
  • 40' x 30' (12.2 m x 9.1 m) Scan Area
  • Precision Rack and Pinion Drive
  • L-band to mmWave Measurements
  • Far-field, Near-field, and Holographic Patterns
  • Space Based Applications

Construction Steel X beams supporting steel Y bridge
Drive System Precision Stepper Motors; Rack and Pinion
Scan Area 40' x 30' (12.2 m x 9.1 m)
Planarity < 0.010" (0.250 mm) RMS
Corrected Planarity (Requires optional Structure Correction Software and Probe Translation Stage < 0.002" (0.050 mm) RMS
Resolution 0.001” (0.025 mm) (X)
0.002” (0.050 mm) (Y)
Position Repeatability 0.002" (0.050 mm) RMS
Scan Speed 10 in/s (0.25 m/s) (X)
20 in/s (0.50 m/s) (Y)
Probe Carriage Capacity 100 lb (45 kg)
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" H x 14" D)
Motor Cables 40' (12 m) with quick-connect terminations
Probe Optional See our list of standard Open Ended Waveguide (OEWG) Probes
Scanner Absorber X-Y absorber kit, 18" pyramidal under bridge, 5" wedge absorber on X rails
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 - 421.1" (10697.0m)
  • Depth - 390.7" (9923.0m)
  • Height - 296.1" (7521.0m)
  • Weight - 22,200 lb (10,070 kg)
  • No additional links are currently available.

500H-40X30 - 40' x 30' (12.2 m x 9.1 m) Scanner System including X-Y stepper motor driven scanner with dual steel X-beams, steel Y-bridge, probe carriage, 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-5620 - Probe Translation Stage, 4" (100 mm) Travel
NSI-SC-5630 - Probe Roll Stage (100 mm) 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