The MBX33 from Milliwave Silicon Solutions is a mmWave Mini-Chamber that fits on an 8-foot lab bench. Compared to the standard MilliBox line, the MBX33 is composed of 30 Inch 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 (max size: 40 x 200 x 110 mm) 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.
This chamber measures 8′ x 3’8″ x 2’8″ and is ideal for 24 GHz radar, 5G (NR) mmWave, 60 GHz, 802.11ad, 802.11ay, 77 GHz automotive radar, 81 GHz radar, and Other proprietary mmWave design from 18 GHz to 95 GHz. It can also be used for beamforming 3D capture, Over-The-Air mmWave measurements, antenna-array performance tests, beam coverage assessment, in-system antenna placement, and production tests applications.
