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Smart Module Series
SC600Y&SC600T Hardware Design
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6.3.1. Recommended Circuit for Passive Antenna
GNSS antenna interface supports passive ceramic antennas and other types of passive antennas. A reference
circuit design is given below.
Figure 35
: Reference Circuit Design for GNSS Passive Antenna
When the passive antenna is placed far away from the module (that is, the antenna trace is long), it is
recommended to add an external LNA circuit for better GNSS receiving performance, and the LNA should
be placed close to the antenna.
6.3.2. Recommended Circuit for Active Antenna
The active antenna is powered by a 56nH inductor through the antenna's signal path. The common power supply
voltage ranges from 3.3V to 5.0V. Although featuring low power consumption, the active antenna still requires
stable and clean power supplies. It is recommended to use high performance LDO as the power supply. A
reference design of GNSS active antenna is shown below.
Type Frequency Unit
GPS 1575.42±1.023 MHz
GLONASS 1597.5~1605.8 MHz
BeiDou 1561.098±2.046 MHz
NOTE
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