MilliBox, the leader in compact benchtop mmWave and sub-THz antenna test systems, showcases its innovations at the 2025 IEEE MTT-S International Microwave Symposium (IMS 2025) in San Francisco, CA, from June 15 to June 20, 2025.
At IMS 2025, MilliBox demonstrated the first-ever live 3D over-the-air (OTA) capture of a J-Band antenna array at 330GHz using its MBX32CTR system. The test setup consists of a 5.5ft MBX32 chamber and a GIM04H-300E 3D positioner. The chamber is equipped with a parabolic reflector and feed horn designed by Eravant, eliminating the far field distance constraints. A vector network analyzer from Copper Mountain Technologies, in conjunction with MilliBox software and the WR-03 frequency extenders provided by Eravant, enables high-resolution 3D radiation pattern data acquisition.
The antenna under test, designed by Nokia Bell Labs, is an 8-element Antipodal Vivaldi Array fabricated on a single-layer glass substrate. It leverages Samtec’s Glass Core Technology and Mosaic Microsystems’ precision glass processing. This cutting-edge design, developed for internal research purposes, lays the groundwork for future 6G applications and covers the entire J-band frequency range from 220 to 330 GHz. The live demonstration is featured at the MilliBox booth #226.
“This never-seen-before demonstration pushes design and test capabilities at the farthest frontier of the mmWave spectrum. It not only proves feasibility—it shows that these capabilities are becoming accessible to engineers working on the next generation of radio technologies,” said Michael Holyoak, Department Head of EM Systems & Integration at Nokia Bell Labs.
Click here to view everything RF’s comprehensive coverage of the IMS 2025.