The Evolution of RF Instrumentation and Antenna Measurements: Bridging the Gap in Active Device Testing

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Modern wireless standards such as LTE, HSPA, WiMAX, and 5G have introduced the need for more sophisticated testing of devices that use multi-antenna systems. Traditional Over-the-Air (OTA) test methods, initially developed for singleinput single-output (SISO) devices, fall short when evaluating complex systems like Multiple-Input Multiple-Output (MIMO) devices. This paper discusses the convergence of traditional testing methodologies based on conducted RF testing and OTA antenna system test methodologies toward testing of the full antenna equipped device. This convergence embraces two important testing needs and scenarios: replay of preconfigured scenario, based on spatial fading emulation (SFE) / channel modelling and dynamic hardware-in-the-loop testing, where changes in the hardware state in reflected in the status of the testing scenario. By the integration of channel emulation and multiprobe anechoic configurations, scalable and flexible test strategies can be achieved accommodating testing needs in personal and automotive communication systems but also defense applications.

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