LPWA Module Series
BG770A-GL Hardware Design
BG770A-GL_Hardware_Design 55 / 75
The module of BG770A-GL is designed with a passive antenna.
5.3. Antenna Installation
5.3.1. Reference Design of RF Layout
For users’ PCB, the characteristic impedance of all RF traces should be controlled to 50 Ω. The
impedance of RF traces is usually determined by the trace width (W), the materials’ dielectric constant,
height
from the reference ground to the signal layer (H),
and the clearance between RF traces and
grounds (S)
. Microstrip or coplanar waveguide is typically used in RF layout to control characteristic
impedance. The following are reference designs of microstrip or coplanar waveguide with different PCB
structures.
Figure 24: Microstrip Design on a 2-layer PCB
Figure 25: Coplanar Waveguide Design on a 2-layer PCB
NOTE
