| 摘要 |
PURPOSE: An RF front part circuit for a compound mobile communication terminal using a common antenna for a multiple frequency band is provided to have a composition to be suitable for a circuit design using the single unit common antenna in the compound mobile communication terminal using inter-different frequency bands. CONSTITUTION: A single unit common antenna(202) uses a GPS(Global Positioning System) frequency band and a mobile communication frequency band in common. A directional coupler(204) connects among the common antenna(202), a GPS receiver(102), and a cellular transceiver(100), transmits and receives an RF(Radio Frequency) signal of the cellular transceiver(100) through the common antenna(202), and provides the RF signal received through the common antenna(202) to the GPS receiver(102).
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