5G In-Air Field-Strength CoLT Measurements for Radar Altimeter Research

Описание: The topic of radio interference that might possibly occur from some U.S. 5G transmitters to band-adjacent airborne radar altimeter (radalt) receivers is currently of great interest to federal agencies, U.S. industry, Congress, the White House, and the general public. A key technical aspect of the problem is the amount of power that is unintentionally radiated from 5G base station transmitter antennas at high elevation angles, where aircraft fly. 5G base stations ordinarily only radiate with their intentional main antenna beams directed toward user equipment (UEs, essentially phones). NTIA’s Boulder laboratory, ITS, has begun performing measurements of the unintentional antenna radiation from 5G base stations, to quantify exactly how much power will impinge on aircraft flying near such tower locations. In this video, we briefly describe in lay terms the concern for 5G versus radalts. We go on to show how we are setting up and performing airborne 5G radiation measurements around such transmitters at the Department of Commerce’s Table Mountain field facility north of Boulder. Video sequences show viewers the putative problem, the setup for airborne measurements, and a sampling of some of the measurements themselves. The video sequences, including some data examples, allow viewers to understand qualitatively how ITS is working to solve this problem. Exactly analyzed data results are not provided; those will be provided in later NTIA Technical Reports. This video is instead an introductory overview of our approach to resolving this spectrum engineering problem. (NTIA Special Publication SP-22-560)

Frank H. Sanders, Author and Narrator; Kenneth R. Tilley, Producer