| 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 a continuous wave. SOLUTION: An FM modulator 20 outputs the transmission signal of the continuous wave subjected to the modulation processing of frequency on the basis of a modulation signal 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, the phase of the modulation signal is adjusted by a phase adjusting part 23 and a plurality of transmission signals mutually shifted in phase are formed by the FM modulator 20. Then, the demodulation signal is obtained by respectively utilizing a plurality of the transmission signals mutually shifted in phase. Further, a plurality of demodulation signals are subjected to addition processing in respective addition parts 46 and 48. By this constitution, the unnecessary wave components contained in the demodulation signals are reduced. COPYRIGHT: (C)2011,JPO&INPIT
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