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Detection of human respiration using square‐wave modulated electromagnetic impulses
Author(s) -
Ong Keat G.,
Dreschel William R.,
Grimes Craig A.
Publication year - 2003
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.10759
Subject(s) - impulse (physics) , microwave , amplitude , physics , acoustics , electromagnetic radiation , optics , quantum mechanics
A technique for monitoring human respiration utilizing square‐wave modulated electromagnetic impulses is presented. Lung volume changes associated with human respiration alter the time‐amplitude spectrum of a reflected electromagnetic impulse, while the Brillouin‐precursor associated with impulse propagation through dispersive media enables detection through otherwise opaque barriers. Results of numerical simulations and experiments are presented. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 339–343, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10759