MBX32CTR – Compact Antenna Test Range

MBX32CTR Compact Antenna Test Range is the right solution when the desired far-field distance exceeds dimensions that can be achieved by standard-sized systems like MBX34. Because it uses a parabolic reflector and a matching probe antenna placed at the focal point, the measurement distance between the probe and the DUT becomes virtually infinite and allows for RF measurements to be done using chambers that are much smaller than the calculated far-field distance of the DUT.

This innovative solution is offered from 18GHz to 54GHz with coaxial wiring of the DUT and probe, while from 54GHz to 330GHz, it is equipped with built-in VNA frequency extenders with waveguide interfaces. MBX32CTR is a complete solution for mmWave and sub-THz OTA measurement with a quiet zone of 150mm. This package includes an MBX32 chamber, a GIM04H-300E 2-axis positioner, a laser alignment system, a 300mm parabolic reflector, and its focus probe antenna.

The MBX32 chamber is ideally placed on a 6-ft lab bench. Its 22” cavity size, which is the free space between absorber panels, provides enough space for the 300mm reflector and GIM04-300E positioner. As with other configurations, the wiring of the probe and the DUT is done through the chamber deck and conveniently attaches to the measurement instrument placed in the two available bays.

Parabolic Reflector and Probe are the key elements of MBX32CTR. The reflector and the probe are carefully designed by Eravant and are aligned with the laser alignment kit provided to ensure the probe is exactly at the focus point of the reflector. This allows for the abstraction of distance from the DUT placed on the positioner. The reflector is edge roll type precision machined and polished. The probe selection must match the waveguide size suitable for the desired frequency, typically 18GHz to 330GHz.

Direct coaxial or integrated VNA frequency extenders are available with MBX32CTR. This mainly depends on the frequency band desired, and the type of test instrument used. The table below shows the different focus probes available and their connector type that must be specified upon ordering this system.