Smart Module Series
SC606T Series Hardware Design
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6.3.2. Reference Design for Active Antenna
The active antenna is powered by a 56 nH inductor through the antenna's signal path. The common
power supply voltage ranges from 3.3 V to 5.0 V. Featuring low power consumption, the active antenna
requires a stable and clean power. It is recommended to use a high-performance LDO to regulate the
supply voltage for the active antenna. A reference design of GNSS active antenna is shown below.
3V3
Module
ANT_GNSS
56 nH
10R
1
μF
100 pF
NM
NM
C4
C1
R1
L1
R2
0R
C5
C3
C2
100 pF
R4
R3
R5
Active Antenna
0R
Figure 38: Reference Design for GNSS Active Antenna
It is strongly recommended to reserve the π
- type attenuation network.
6.4. Antenna Installation
6.4.1. Antenna Requirements
The following table shows the requirements on the main antenna, the Rx-diversity antenna, the Wi-Fi/BT
antenna, and the GNSS antenna.
Table 38: Antenna Requirements
Antenna Type
Requirements
GSM/WCDMA/
LTE
VSWR:
≤ 2
Gain (dBi): 1
Max Input Power (W): 50
Input Impedance (
Ω): 50
NOTE