RADIO SYSTEM, ANTENNA ARRANGEMENT AND POLARIZATION MODULATOR FOR GENERATING TRANSMIT SIGNAL WITH CHANGING POLARIZATION

摘要

PURPOSE: A radio system, an antenna arrangement, and a polarization modulator for generating a transmit signal with changing polarization are provided to more effectively utilize frequencies available for a wireless network, resulting in reduction of a cluster size of the wireless network. CONSTITUTION: A base stations (10) has at least more than one transmitters(TX) and at least one receiver(RX1,RX2). At least more than one dual polarization antennas(27) are assigned in each base station(10). The polarization modulator(24) which changes the polarization of a transmission signal to be sent at a prescribed time to the dual polarization antennas(27) is assigned to more effectively utilize the available frequency band and reducing cluster size.