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Extraction mechanism study of the microwave cardio‐graph (MCG)
Author(s) -
Zheng Jun,
Huang Yong,
Qian Jian
Publication year - 2009
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.24598
Subject(s) - microwave , waveform , graph , computer science , key (lock) , acoustics , electronic engineering , electrical engineering , engineering , physics , telecommunications , theoretical computer science , voltage , computer security
We developed a sensitive microwave cardio‐graph (MCG) meter that can extract time‐domain heart moving signals. In this article, we first describe the structure of the system, and then analyze the extracting principle focusing on the key step: the carrier‐wave cancellation and its effect, and finally present the graphs captured by this apparatus under various conditions. From the experiment results, we can see that (1) the MCG signals captured in this way are characteristic, steady, and repeatable; (2) there is no obvious correspondence in position between the peak and valley points of MCG and the P, Q, and R points of ECG; (3) if the distance between the two antennas changes, the MCG waveform tends to repeat periodically. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2348–2354, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24598