To provide a radio station system which can realize radio communication service of a plurality of frequency bands with flexible configuration of high-definition, in the case that the service is realized.
A slave station instrument 4 is connected to a key station instrument 2 by using an optical fiber cable 5, the required number of transceiver amplifiers 6 are connected to the slave station instrument 4, respectively by using metal cables 7, antennas 8 are connected to the transceiver amplifiers 6, respectively, and communication area of a mobile communication apparatus 9 is formed. Units U1-U3 which are arranged in the slave station instrument 4 and perform photoelectric conversion and modulation/demodulation and the transceiver amplifiers 6 are instruments corresponding to frequency bands of communication service, so that amplification wherein distortion is restrained is performed. Further, expansion of service is easily enabled by extension of the instruments.
Hiroyuki Matsumoto