FREQUENCY CONVERSION DEVICE

PROBLEM TO BE SOLVED: To provide a frequency conversion device of saved space and energy at low cost. SOLUTION: The frequency conversion device comprises a local oscillator that generates local oscillation frequency signals used for frequency conversion of base band signals; a distributor for distributing the local oscillation frequency signals to two distribution station originated signals; a frequency convertor in which the base band signal and one of two distribution station originated signals are input, and the base band signal is frequency-converted into high frequency signal; a vector adjuster in which one of the two distribution station originated signals is input for phase inversion of the distribution station originated signal, a synthesizer where the frequency converted signal that is frequency-converted by the frequency convertor and the distribution station originated signal that has been phase-inverted are input, and the two input signals are vector-synthesized to cancel the component of the local oscillation frequency signal in the output of the frequency convertor; and a low-pass filter or high-pass filter that is connected to the output side of the synthesizer for taking out a high frequency signal. COPYRIGHT: (C)2007,JPO&INPIT