TRANSMITTINGGANTENNA SHARING SYSTEM OF GROUND MOBILE RADIO BASE STATION

摘要

PURPOSE:To facilitate the design and to reduce a division loss as to traffic by equalizing respective band-pass filters in passing band width and resonance frequency in respective groups of antennas and by covering the same passing bands overlapping each other as many as groups of shared antennas. CONSTITUTION:Respective band-pass filters 322 of the transmitting-antenna sharing system cover the same passing bands overlapping each other as many as groups of shared antennas and to each band-pass filter 322, transmitter 401 the multichannel switching function available for transmission over a radio channel in the corresponding band is connected to make the same bands overlap as many as groups of antennas. Consequently, the design of the transmitting-antenna sharing system is facilitated and a division loss as to the traffic can be reduced. In addition, the radio channel used by the mobile station in the 1st radio zone can be used in the next radio zone in an area where the same frequency group is in use, so that multichannel switching functions at the mobile station side can be reduced greatly.