A radio communication device includes: a local oscillator; an amplifier
amplifying an output signal of the local oscillator and outputting a
local oscillation frequency and a harmonic wave component thereof; and a
harmonic mixer receiving an output signal of the amplifier and an
information signal, and generating an up-converted signal of the
information signal with the harmonic wave component based on the local
oscillation frequency, while allowing the harmonic wave component to pass
through.