PERSONAL COMMUNICATION SERVICE(PCS)/INTERNATIONAL MOBILE TELECOMMUNICATIONS(IMT) 2000 SHARED TERMINAL SHARING SINGLE INTERMEDIATE FREQUENCY(IF) TERMINAL

摘要

PURPOSE: A personal communication service(PCS)/international mobile telecommunications(IMT) 2000 shared terminal sharing a single intermediate frequency(IF) terminal is provided to form a mixer and a single transceiving IF processor generating a PCS/IMT 2000 shared IF by the PCS/IMT 2000 shared terminal, so as to reduce component numbers and a designing time, and to minimize a terminal. The PCS/IMT 2000 shared terminal is provided to perform a switching by a modem, so as to selectively use bandwidths of an intermediate frequency(IF) signal of a transceived IMT 2000. CONSTITUTION: An antenna(100) transceives an international mobile telecommunications(IMT) 2000 or a personal communication service(PCS) transceiving radio frequency(RF) signal. A mode selecting switch(200) selects an IMT2000 mode or a PCS mode by a modem control. A first band separator(300) separates bands of IMT2000 radio frequency(RF) signals transceived through the antenna(100). A second band separator(310) separates bands of PCS RF signals transceived through the antenna(100). A receiving circuit terminal(RC) filters/amplifies down-PCS/IMT 2000 RF signals received from the first and the second band separator(300,310), and converts the down-PCS/IMT 2000 RF signals into down-PCS/IMT 2000 shared intermediate frequency(IF) signals. A transmitting circuit terminal(TC) generates/filters up-PCS/IMT 2000 shared IF signals, and converts the up-PCS/IMT 2000 shared IF signals into up-PCS RF signals or up-IMT 2000 RF signals to perform signal processes, then inputs the processed signals to the first and the second band separator(300,310).