MBX33 is an innovative mmWave mini-chamber which fits on a 8ft lab bench. Compared to the standard MilliBox line, the MBX33 is composed of 30″ cubes to allow for more space inside the chamber. It has 3 instrument bays to place a spectrum analyzer or vector network analyzer on one side and a signal generator or baseband board on the other side below the measurement deck. This configuration saves space and reduces loss due to long coax wiring. Wiring of the device-under-test (DUT) is done with on axis pass-through channels to prevent cable tangling. The DUT is mounted on the laser guided 3D gimbal rotating platform. The 3D gimbal is controlled over a simple USB connection with software (source provided) containing all the functions and API to run and plot a full spherical (or partial) radiation pattern graph up to 1 degree resolution (64000 points). The output of the plot is a time stamped comma separated value (.csv) heat-map file listing all capture positions and corresponding captured data. This heat-map file can then be post-processed for graphic rendering with virtually any mathematics and graphic tools available on the market.

MBX33 is suited for 186cm far-field measurements


  • 24GHz radar
  • 5G (NR) mmWave
  • 60GHz, 802.11ad, 802.11ay
  • 77GHz automotive radar
  • 81GHz radar
  • Other proprietary mmWave design from 18GHz to 95GHz


  • Beamforming 3D capture
  • Over-The-Air mmWave measurements
  • Antenna-array performance test
  • Beam coverage assessment
  • In-system antenna placement
  • Production test


  • Compact size: 8′ x 3’8″ x 2’8″ (WHD)
  • Range -180 to +180 degree in H and V planes
  • Far-field distance 186cm
  • Resolution < 0.1 degree in both planes
  • Laser guided calibration at 0.1 degree accuracy
  • Maximum DUT size 40mm x 200mm x 110mm (1.5″ x 7.9″ x 4.3″) THW
  • Maximum DUT weight 500g (1lb) balanced
  • Absorber performance -50dB at normal incidence.
  • Made in USA with domestic and imported parts
  • Customization available on request