Over-the-Air testing of Active Antenna System Base Stations in Compact Antenna Test Range

The definition of suitable test methods for Over the Air (OTA) measurements of non-connectorized devices is an ongoing process in several standardization committees. Among the different possibilities, the Compact Antenna Test Range (CATR) is a well-established technology that can be adapted to OTA measurement application with relatively low development efforts and therefore short deployment time. The main advantages of the use of a CATR for OTA testing is the direct measurement of Far-Field parameters, and the very wide frequency bandwith, allowing sub6GHz and mm-Wave testing.In this paper, we will summarize the performance and the testing capabilities of a short focal-length, corner-fed CATR design, providing a 1.5 m x 1.5 m cylindrical Quiet Zone, operating from 1.7 GHz to 40 GHz and upgradeable to 110 GHz, allowing OTA measurements of Active Antenna System (AAS) Base Stations (BS), installed at Ericsson premises in Sweden.