Transceivers for Regional Multipoint Distributed Services (LMDS) System Hubs

摘要

In order to achieve the above object, it is to provide a local multi-point distributed service (LMDS) system hub suitable for reducing the initial investment of the LMDS system by minimizing the number of spare transceivers at the time of hub installation. Transmitters and receivers of a local multipoint distributed service (LMDS) system hub transmit signals to subscribers in a body form with the first to fourth main transmit / receive modules and the first to fourth main transmit / receive modules respectively located at corners of the rooftop of the hub. First to fourth main transmit / receive antennas configured to be configured, one preliminary transmit / receive module located at the center of the rooftop, and first to fourth positions respectively located on all sides of the preliminary transmit / receive module to face the first to fourth main transmit / receive module directions 4 The first and second preliminary transmission and reception by receiving a control signal of a network management service of a preliminary transmission / reception antenna and a headend A first waveguide switch configured to selectively switch to a tena, a second waveguide switch configured to selectively switch to the third and fourth preliminary transmit / receive antennas in response to a control signal of a network management service of the headend, and the preliminary transmit / receive module And a third waveguide switch configured to transmit a signal to the first and second waveguide switches.