5G Internet of Things (IOT) Near and Far-Fields and Regulatory Compliance Intricacies

Internet of things (IOT) primarily consist of an instrumentation system with connectivity to the internet. Most modern applications of IOT would be integrated with wireless connectivity. Billions of devices will be incorporated with million types of wireless devices operating at varying frequency bands, power levels, and time intervals. Both intentional and unintentional radiations from the circuits of device instrumentation system and collocated devices, and operating environments can be higher than the wireless receiver operating sensitivity levels. This paper reviews testability challenges of 5G IOT devices incorporated with mmW and low frequency wireless. It provides some insight on mmW near-field and far-field measurement challenges and radiated immunity evaluation necessity. It also describes a theory and data to prove that the near-field distance is shorter than the calculated distance based on overall dimensions of the massive MIMO antenna system.