Electromagnetic interference on medical equipment by low-power mobile telecommunication systems

Eisuke Hanada, Yasuaki Antoku, Shigeki Tani, Michio Kimura, Akira Hasegawa, Shigeo Urano, Kazuhiko Ohe, Michiyasu Yamaki, Yoshiaki Nose

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)


There have been a number of reports of electromagnetic interference (EMI) on electronic medical equipment caused by mobile telecommunication systems. In Japan, the use of the personal handy-phone system (PHS) has greatly expanded within urban areas. PHS handsets transmit EM signals at a frequency of 1.9 GHz and have a peak radiated power of 80 mW. This power level is lower than that of other mobile telecommunication systems. Two studies were carried out. One was to determine whether or not PHS interferes with electronic medical equipment in hospitals. We observed no EMI on electronic medical equipment when the PHS handset was in either the speaking mode or on standby. The second study was to observe EMI from 1.9-GHz signals at several radiation power levels. Although EMI was not observed at the radiated peak power of the PHS handset, EMI on some of the tested equipment was observed when the radiated power was ten or more times higher than that of the PHS handset.

Original languageEnglish
Pages (from-to)470-476
Number of pages7
JournalIEEE Transactions on Electromagnetic Compatibility
Issue number4
Publication statusPublished - Nov 2000

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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