User's Manual

LTE Module
EC20 Hardware Design
EC20_Hardware_Design Confidential / Released 51 / 83
Table 25: GNSS Frequency
Type
Frequency
Unit
GPS
1575.42 ± 1.023
MHz
GLONASS
1597.5 ~ 1605.8
MHz
The reference design of GNSS antenna is shown as below.
GNSS
Antenna
VDD
Module
ANT_GNSS
47nH
10R
0.1uF
100pF
NMNM
Figure 28: Reference Circuit of GNSS Antenna
1. You can choose an external LDO to supply power according to the active antenna.
2. If you design it with passive antenna, the VDD circuit is not needed.
5.3. Antenna Installation
5.3.1. Antenna Requirement
The following table shows the requirement on main antenna, Rx-diversity antenna and GNSS antenna.
Table 26: Antenna Requirements
Type
Requirements
NOTES