| 摘要 |
PROBLEM TO BE SOLVED: To reduce an unnecessary wave component in a technique for extracting data in vivo from a target position using continuous waves. SOLUTION: A first FM modulator 21 is constituted so as to subject a feed wave signal to the modulation processing of frequency on the basis of a modulation signal to form the transmission signal of the continuous wave and a receiving mixer 30 uses a reference signal adjusted in the correlation with the target position in a living body to apply demodulation processing to a receiving signal to thereby obtain the demodulation signal corresponding to the target position. In this transmission and reception processing, a second FM modulator 22 subjects the feed wave signal to the modulation processing of frequency on the basis of the modulation signal in the same way as the first FM modulator 21 to form the reference signal. The intensity of the modulation in the modulation processing of frequency of the reference signal is adjusted to reduce the unnecessary wave component contained in the demodulation signal corresponding to the target position. COPYRIGHT: (C)2011,JPO&INPIT
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