Ability Enterprise Co. Ltd. JA0D0J0 Manuel D’Utilisation
Doc No.
Rev
1.0
Document released
Date.
15/8/25
Page
5
Description
WM-BN-BM-26_A User Manual
2 PCB Layout Guideline
DC power
•
Use wide traces for power supply lines. Know the maximum currents being carried on
each power supply trace, and make the trace widths proportionate to the current
(especially for long trace lengths). Where possible, fill large areas with copper to
distribute the highest currents. These measures minimize IR drops, line inductance, and
switching transients.
•
(especially for long trace lengths). Where possible, fill large areas with copper to
distribute the highest currents. These measures minimize IR drops, line inductance, and
switching transients.
•
Use several plated via holes to connect power supply traces between layers. The
number of vias used should be proportional to the current being routed.
•
•
Avoid loops in the supply distribution traces. Current-carrying loops are essentially
antennas radiating electromagnetic fields that may corrupt transceiver performance or
cause regulatory electromagnetic interference (EMI) test failures
cause regulatory electromagnetic interference (EMI) test failures
Capacitor for power line, please close to module pin out
Isolate the supplies trace with ground
Spread out the LDO supply lines to reduce coupling
RF
General guidelines for routing RF signals of WLAN Antenna port
RF signals require controlled-impedance lines to minimize mismatch losses and
efficiently transfer energy from source to load. The line impedance depends upon several
variables — trace width and thickness, co-planar ground spacing, height of dielectric
material between the trace and ground plane(s), and dielectric constant of the PCB
material. Given the PCB material selected, the geometry of the micro-strip, strip-line, or
co-planar grounded waveguide (CGW) elements must be designed properly to provide
the desired 50-Ω impedance. Design of micro-strip, strip-line, and CGW elements is well
documented and supported in many microwave software applications
efficiently transfer energy from source to load. The line impedance depends upon several
variables — trace width and thickness, co-planar ground spacing, height of dielectric
material between the trace and ground plane(s), and dielectric constant of the PCB
material. Given the PCB material selected, the geometry of the micro-strip, strip-line, or
co-planar grounded waveguide (CGW) elements must be designed properly to provide
the desired 50-Ω impedance. Design of micro-strip, strip-line, and CGW elements is well
documented and supported in many microwave software applications
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authorized in writing by Universal Scientific Industrial Co., Ltd. Copyright © 2011 Universal Scientific Industrial Co. ,Ltd.
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