USER MANUAL
TCM 410J
–
Transceiver Module
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TCM 410J User Manual | v2.3 | June 2022 | Page 33 / 46
The PCB antenna uses three discrete matching components. The position of these compo-
nents can be seen in figure below.
Position of matching components
The antenna was matched to 50
Ω
input impedance at the feed point. A compromise for a
good matching when plugged into a laptop and when plugged to the end of a USB cable was
chosen. Several environments in the proximity of the antenna where also evaluated for this
compromise. The following table shows the values of the proposed components.
Component
Value
C1
3.3pF
L1
12nH
L2
12nH
0603 components should be used for the antenna matching. For the capacitor general pur-
pose C0G capacitors with 5% tolerance are sufficient.
The inductors should be wire wound inductors from the Würth WE-KI series or the Murata
LQW series.
C1
L2
L1
