The present invention relates to a wireless CATV, and more particularly, to a small size, economical and required in a receiving downconverter and an antenna (flat) as a specific information transmission means suitable for a community by using an indoor antenna in conjunction with a satellite-based direct reception system. It is to provide a 28 GHz band LMDS system capable of transmitting and receiving high frequency bands such as the 28 GHz band that can satisfy the characteristics.
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