Avionics
RTCA Warns of 5G's Effect on Radar Altimeters
An auction of frequency licenses in the spectrum from 3.7–3.98 GHz could cause significant safety problems for all segments of aviation.

An RTCA Special Committee has issued a report that raises concerns about the frequency spectrum assigned to 5G applications interfering with aircraft radar altimeters. According to the report, the frequency spectrum from 3.7– to 3.98-GHz, which the Federal Communications Commission has assigned to upcoming flexible 5G telecommunications applications, may “introduce harmful radio frequency (RF) interference to radar altimeters currently operating in the globally-allocated 4.2– to 4.4-GHz aeronautical band."


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