Samsung SCH-A310 Service Manual page 31

Circuit Description
POWER AMP MODULE (U441)
Power amp module amplifies RF signal and send it
to base station through the antenna.
ISOLATOR (U441)
Isolator is used to reduce a reflected signal to
protect the power amp module from being
demaged.
DUPLEXER (F440)
Duplexer controls to transmit through the antenna
only the signals within acceptable TX frequency
range (1880±30MHz) and to receive through the
antenna only the signals within acceptable RX
frequency range (1960±30MHz).
It also matches LNA input in receiving part and
Power Amplifier output in transmitter part with the
antenna.
SAMSUNG Proprietary-Contents may change without notice
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