Rf Antenna Reference Design - Quectel BC660K-GL Manual

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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.
Figure 19: Reference Design for NB-IoT Antenna Interface
BC660K-GL_Hardware_Design
758–768 MHz
734–746 MHz
860–875 MHz
875–890 MHz
791–821 MHz
1930–1995 MHz
758–803 MHz
2110–2180 MHz
1995–2020 MHz
728–746 MHz
GND
ANT_RF
GND
Module
BC660K-GL Hardware Design
788–798 MHz
704–716 MHz
815–830 MHz
830–845 MHz
832–862 MHz
1850–1915 MHz
703–748 MHz
1710–1780 MHz
1695–1710 MHz
698–716 MHz
R1
0 Ω
C1 C2
NM NM
NB-IoT Module Series
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