Reference Design; Gnss; Antenna Interface & Frequency Bands - Quectel BG95 A-GL Series Hardware Design

LPWA Module Series

5.1.4. Reference Design

It is recommended to reserve a π-type matching circuit for better RF performance, and the π-type
matching components (R1, C1 and C2) should be placed as close to the antenna as possible. The
capacitors are not mounted by default.
Figure 31: Reference Circuit of Main Antenna Interface

5.2. GNSS

BG950A-GL, BG953A-GL and BG955A-GL module features a fully integrated GNSS solution that
supports GPS and GLONASS. BG951A-GL module has an independent GNSS solution that supports
GPS, GLONASS, BDS, Galileo and QZSS.
The modules support standard NMEA 0183 protocol. BG950A-GL, BG953A-GL and BG955A-GL outputs
GNSS NMEA sentences via the CLI UART interfaces. BG951A-GL outputs NMEA sentences via the
GNSS UART interface. Data update rate for both modules: 1–10 Hz; 1 Hz by default.
GNSS engine is switched off by default. It must be switched on via AT command. BG950A-GL,
BG953A-GL and BG955A-GL does not support concurrent operation of LTE and GNSS, while
BG951A-GL does. For more details about GNSS engine technology and configurations, see
document [4].
5.2.1. Antenna Interface & Frequency Bands
The pin definition, frequency bands, and performance of GNSS antenna interface are presented in the
following table shows.
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