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Smart LTE Module Series
SC20 Hardware Design
SC20_Hardware_Design 81 / 130
Table 37: Wi-Fi/BT Frequency
Type
Frequency
Unit
802.11a/b/g/n
2400~2482
5180~5825
MHz
BT4.2 LE
2402~2480
MHz
The supported Wi-Fi frequencies of SC20-JL are 2400MHz~2496MHz and 5180MHz~5825MHz.
A reference circuit design for Wi-Fi/BT antenna interface is shown as below. A π-type matching circuit
should be reserved for better RF performance. The π-type matching components (R1, C1, C2) should be
placed as close to the antenna as possible and are mounted according to the actual debugging. C1 and
C2 are not mounted and a 0Ω resistor is mounted on R1 by default.
ANT_WIFI/BT
R1 0R
C1
Module
NM
C2
NM
Wi-Fi/BT
antenna
Figure 36: Reference Circuit Design for Wi-Fi/BT Antenna
6.3. GNSS Antenna Interface
The following tables show pin definition and frequency specification of GNSS antenna interface.
Table 38: Pin Definition of GNSS Antenna Interface
Pin Name
Pin No.
I/O
Description
Comment
ANT_GNSS
121
AI
GNSS antenna interface
50Ω impedance
NOTE