| 摘要 |
PURPOSE: An apparatus for frequency assignment utilizing a common antenna without transmission traffic combination in WLL system is provided to simplify an equipment and make size of the equipment small by utilizing an existing antenna. CONSTITUTION: A duplexing part(31) receives a transmission signal, transmits the same through an antenna(30), and receives a frequency signal of a band through the antenna(30). A first directional coupling part(32) includes a detecting terminal for monitoring input/output of a signal exchanged between the duplexing part(31) and the antenna(30). A first low noise amplifying part(33) suppresses a frequency signal of a band received to the duplexing part(31) and amplifies the same. A first band pass filter(34) outputs only a signal of an FA1 receive frequency band in the signals amplified by the first low noise amplifying part(33). A second directional coupling part(36) outputs a signal received by the antenna(30) to the second band pass filter(37), and monitors the output signal. The second band pass filter(37) passes only a signal of a frequency band among signals output by the second directional coupling part(36). The second low noise amplifying part(38) amplifies a signal output from the second band pass filter.
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