WIRELESS CONNECTIVITY & SENSORS
User manual Proteus-II
• Filter and blocking capacitors should be placed directly in the tracks without stubs, to
achieve the best effect.
• Antenna matching elements should be placed close to the antenna / connector, blocking
capacitors close to the module.
• Ground connections for the module and the capacitors should be kept as short as possible
and with at least one separate through hole connection to the ground layer.
• ESD protection elements should be placed as close as possible to the exposed areas.
Figure 10: Placement of the module with integrated antenna
15.2. Dimensioning of the micro strip antenna line
The antenna track has to be designed as a 50
Ω
feed line. The width W for a micro strip can be
calculated using the following equation:
W
= 1
.
25
×
5
.
98
×
H
e
50
×
√
r
+1
.
41
87
−
T
met
!
(1)
Example:
A FR4 material with
ε
r
= 4.3, a height H = 1000 µm and a copper thickness of T
met
= 18 µm will
Order code 2608011x24010
152
Version 1.11 , July 2022