Streamlined Millimeter-Wave and Subterahertz Spherical Far-Field Measurement System Supporting Various Antenna Types and Feed Interfaces: Use cases of antenna measurement system

This article presents a cost-effective, multifunctional far-field measurement system for high-directive and multibeam scenarios across the desired half-plane space of the 3D spherical range in millimeter-wave (mm-wave)/subterahertz (sub-THz) antennas. To realize these far-field measurement systems that can be widely utilized in various mm-wave/sub-THz applications, three representative measurement scenarios consisting of distinctly different antenna types and feed interfaces are exemplified and discussed under realistic constraints amid pragmatic antenna measurement challenges. In particular, cost-effective device-under-test (DUT) sample-fixturing methods and considerations of metallic weights for minimizing undesired vibrations in the rotary stage are utilized in the proposed far-field system to enhance the measurement capability and accuracy. Afterward, each measurement scenario is demonstrated using the exemplified samples. Finally, the main features and possibilities for further improvement are extensively discussed regarding the proposed measurement methods and system through a comparison with state-of-the-art references.