SAMSUNG Proprietary-Contents may change without notice
6-6
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.