Provided are an apparatus for transmitting reference signals for measuring the phase response characteristic of a human body in human body communication, and a system and method for measuring the phase response characteristic of a human body using the same. The apparatus including: a signal generator for generating reference signals for measuring the phase response characteristic of a human body; a signal distributor for distributing the generated reference signals to a transmitting electrode and a frequency converter; the transmitting electrode for applying the reference signals distributed by the signal distributor to a human body; the frequency converter for converting the frequency of the reference signals distributed by the signal distributor into a frequency different from a frequency of a reference signal applied to the human body via the transmitting electrode; and a radio antenna for wirelessly transmitting the frequency-converted reference signal to a free space.

 
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