User's Manual
5
2.2 The composition and principle block diagram in the paper
2.2.1 The block diagram of
INDOOR OUTDOO
R
duplexer duplexer
UP_LNA UP_PA
filter
DW_PA DW_LNA
filter
duplexer duplexer
UP_LNA UP_PA
filter
DW_PA DW_LNA
filter
Combiner
u
1
x
2
x
1
f(x
1
...x
n
)
Combiner
u
1
x
2
x
1
f(x
1
...x
n
)
850M
1900M
The principle diagram amplifier
2.2.2 The principles outlined
Mainly by 850 M amplifier and 1900 M two amplifier module,The distribution of the method of frequency by
close to complete。First downside (BTS) signals through the OUTDOOR antenna into the method of close,
Close to 850 M and PCS1900M method of two signals to choose apart,And then sent into the corresponding
amplifier module will ampli
。
Signals into the amplifier module,First after duplex device,Downlink signal to choose filter,Enter LNA (low
noise amplifier) preliminary amplification,And then after surface acoustic filter filter,Enter UP_PA (downside
power amplifier) to signal further amplification。After double work of choice is again after filtering,Enter and
method, and then through the heavy start antenna launch out
。