User's Manual
GSM/GPRS/GNSS Module Series
MC20 Hardware Design
MC20_Hardware_Design Confidential / Released 69 / 95
Figure 38: RF Soldering Sample
4.2. GNSS Antenna Interface
The GNSS part of MC20 module supports both GPS and BeiDou systems. The RF signal is obtained from
the GNSS_ANT pin. The impedance of RF trace should be controlled as 50 Ohm, and the trace length
should be kept as short as possible.
4.2.1. Antenna Specifications
The module can be connected to a dedicated GPS/BeiDou passive or active antenna to receive
GPS/BeiDou satellite signals. The recommended antenna specifications are given in the following table.
Table 30: Recommended Antenna Specifications
Antenna Type Specification
Passive Antenna
GPS frequency: 1575.42±2MHz
BeiDou frequency: 1602±4MHz
VSWR: <2 (Typ.)
Polarization: RHCP or Linear
Gain: >0dBi
Active Antenna
GPS frequency: 1575.42±2MHz
BeiDou frequency:1602±4MHz
VSWR: <2 (Typ.)
Polarization: RHCP or Linear
Noise figure: <1.5dB