| 摘要 |
PURPOSE: An SP7T Switchplexer module for a GSM(Global System for Mobile Communications) is provided to enable localization possibility in a component market by changing a signal path of a wireless signal. CONSTITUTION: An SP7T(Single-Pole 7 Throw) switchplexer module for GSM(Global System for Mobile Communications) has 7 ports except an antenna port. A transmission port has a high band port and a low band port. A GSM network and an EGSM(Extended Global System for Mobile communication) network shares the low band port, and PCS(Personal Communication Service), DCS(Digital Cellular System) and UMTS(Universal Mobile Telecommunications Systems) networks share the high band port. According to the SM/EGSM/PCS/DCS/UMTS bands, there are 5 reception ports. By using 10 diodes, a signal path is changed.
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