Reference Design Of Rf Layout - Quectel BC65 Hardware Design

Table 19: Required NB-IoT Antenna Parameters
Parameters
Frequency range
VSWR
Efficiency
Max input power (W)
Input impedance (Ω)

4.2. Reference Design of RF Layout

For user's PCB, the characteristic impedance of all RF traces should be controlled to 50 Ω. The
impedance of the RF traces is usually determined by the trace width (W), the materials' dielectric constant,
the height from the reference ground to the signal layer
ground (S). Microstrip or coplanar waveguide is typically used in RF layout for characteristic impedance
control. The following are reference designs of microstrip or coplanar waveguide with different PCB
structures.
.
Figure 25: Coplanar Waveguide Design on a 2-layer PCB
BC65_Hardware_Design
Figure 24: Microstrip Design on a 2-layer PCB
Requirements
703–2170 MHz
≤ 2
> 30 %
50
50
(H), and the spacing between RF trace and
NB-IoT Module Series
BC65 Hardware Design
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