| 摘要 |
PURPOSE: A wireless relay apparatus for a portable communication apparatus is provided for effectively transmitting and receiving a wireless signal of a wireless call receiver in a non-propagation region such as a building, a underground, etc. CONSTITUTION: An up stream of outdoor/indoor relays(210, 220) each includes a first filter(231) for selecting a signal of a frequency bandwidth of a portable communication apparatus(300) corresponding to a wireless signal transmitted from the portable communication apparatus(300) or the outdoor relay(220), a first amplifier(232) for amplifying a wireless signal from the first filter(231), a second amplifier(233) for amplifying the level of a wireless signal amplified and outputted from the first amplifier(232), and a second filter(234) for selecting and transmitting a signal of a frequency bandwidth of the portable communication apparatus(300) corresponding to a wireless signal outputted from the second amplifier(233) for transmitting to the indoor/outdoor relays(210, 220) or the base station(100).
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