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6
D
J601
Main antenna
C
C601 and C602 are reserved for impedance matching.
B
Active Antenna /
Passive Antenna
A
6
5
RF and GNSS Design
Main Antenna Interface
R601
0R
[1]
ANT_MAIN
C601
C602
NM
NM
GNSS Antenna Circuit
VDD
R603
C605
10R
0.1uF
J603
L603
47nH
C606
100pF
C608
D601
C607
NM
NM
LXES15AAA1-117
5
4
4
3
Diversity antenna
C603 and C604 are reserved for impedance matching.
Notes:
1. You can choose an external LDO according to the active antenna to supply power (VDD left).
2. If you design the antenna circuit with passive antenna, the R603 and L603 are not needed.
[1]
ANT_GNSS
3
2
Diversity Antenna Interface
J602
0R
R602
[1]
ANT_DIV
C603
C604
NM
NM
Quectel Wireless Solutions
DRAWN BY
Mountain.ZHOU
EC20 Reference Design
CHECKED BY
Radom.XIANG
SHEET
2
1
D
C
B
A
PROJECT
TITLE
RF and GNSS Design
SIZE
VER
A2
1.0
6
OF
8
DATE
2015/3/30
1
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