TITLE
PROJECT
Mountain.ZHOU
Radom.XIANG
CHECKED BY
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Quectel Wireless Solutions
SIZE
VER
8
6
1.0
DATE
2015/3/30
EC20 Reference Design
A2
Main Antenna Interface
Diversity Antenna Interface
C601 and C602 are reserved for impedance matching.
RF and GNSS Design
1. You can choose an external LDO according to the active antenna to supply power (VDD left).
Notes:
GNSS Antenna Circuit
2. If you design the antenna circuit with passive antenna, the R603 and L603 are not needed.
Active Antenna /
RF and GNSS Design
C603 and C604 are reserved for impedance matching.
C601
NM
R601
0R
C603
NM
R602
0R
J601
Main antenna
J602
Diversity antenna
C602
NM
C604
NM
L603
47nH
C605
0.1uF
R603
10R
C606
100pF
J603
Passive Antenna
C607
NM
C608
NM
12
D601
LXES15AAA1-117
[1]
ANT_MAIN
[1]
ANT_DIV
[1]
ANT_GNSS
VDD
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