Quectel BC660K-GL, Руководство пользователя

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NB-IoT Module Series
BC660K-GL Hardware Design
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4.3. RF Antenna Reference Design
BC660K-GL provides an RF antenna pin for external NB-IoT antenna connection.
⚫
The RF trace on the host PCB should be a coplanar waveguide or microstrip whose characteristic
impedance is 50
Ω.
⚫
The module comes with ground pads which are next to the antenna pad to give a better grounding.
⚫
To achieve better RF performance, it is recommended to reserve
a π type matching circuit and place
the π-type matching components (R1/C1/C2) as close to the antenna as possible. By default, the
capacitors (C1/C2) are not mounted and a 0
Ω resistor is mounted on R1.
A reference design of the RF interface is shown below.
Module
ANT_RF
R1
C1
NM
C2
NM
GND
GND
0
Ω
Figure 19: Reference Design for NB-IoT Antenna Interface
B14 758
–768 MHz
788
–798 MHz
B17 734
–746 MHz
704
–716 MHz
B18 860
–875 MHz
815
–830 MHz
B19 875
–890 MHz
830
–845 MHz
B20 791
–821 MHz
832
–862 MHz
B25 1930
–1995 MHz
1850
–1915 MHz
B28 758
–803 MHz
703
–748 MHz
B66 2110
–2180 MHz
1710
–1780 MHz
B70 1995
–2020 MHz
1695
–1710 MHz
B85 728
–746 MHz
698
–716 MHz