Potential Interference Issues between FCC Part 15 Compliant UHF ISM Emitters and Equipment Passing Standard Immunity Testing Requirements
David R. Novotny, Jeffrey R. Guerrieri, Daniel G. Kuester
The potential of electromagnetic (EM) interference between multi-channel, FCC Part 15 UHF (902-928 MHz) ISM  emitters and devices that have passed immunity requirements under international standards  is examined. At close ranges, the fields from a Part 15.247 compliant emitter may exceed minimum standard immunity testing levels. This does not imply interference will occur, only that the device may not be qualified to operate in the EM environment near the emitter. Recent studies have indicated that an interference potential can exist between some UHF emitters and medical, commercial and military systems [3, 4]. The range at which Part 15 compliant devices may pose a risk to Industrial, Consumer and Medial devices is estimated and compared to some previously published data. Because Radio Frequency Identification (RFID), especially passive UHF RFID, emitters may be deployed in numerous locations and in close proximity to many devices, it has been the focus of many of the studies of interference potential. RFID emitters are one of the largest populations of the examined Part 15 devices, but the potential of all frequency-hopping, digitally-modulated emitters are addressed.
, Guerrieri, J.
and Kuester, D.
Potential Interference Issues between FCC Part 15 Compliant UHF ISM Emitters and Equipment Passing Standard Immunity Testing Requirements, IEEE International Symposium on EMC, Boston, MA, [online], https://doi.org/10.1109/ISEMC.2009.5284673
(Accessed May 28, 2023)