| 摘要 |
<P>PROBLEM TO BE SOLVED: To optimize, with regard to an intermediary device of an electric wave for a mobile phone, gain of an electric wave in an electric wave blind zone within a building (on the ground and the underground) which the electric wave (800MHz, 1.5GHz and 2GHz zones) is hard to reach. <P>SOLUTION: In a downlink, the intermediary device comprises an antenna 1 for receiving, in the open air, the electric wave of a mobile phone company for every frequency, a downlink LNA 2 for low-noise-amplifying a receiving signal, a downlink intermediary device body 3 for adjusting a receiving signal intensity, a downlink HPA 4 for performing amplification to a speech quality maintaining level, and an antenna 5 for transmitting mainly indoors. Further, in an uplink, the intermediary device comprises an antenna 6 for receiving mainly indoors the electric wave of a mobile phone company for every frequency, an uplink LNA 7 for low-noise-amplifying a receiving signal, an uplink intermediary device body 8 for adjusting a receiving signal intensity, an uplink HPA 9 for performing amplification to a speech quality maintaining level, and an antenna 10 for transmitting mainly in the open air. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
