S42
Hardware User Guide
1VV0301303 Rev. 11
Page 55 of 85
2021-05-06
Not Subject to NDA
application PCB (red area). So, the yellow area is outside the PCB and regards to the
housing, too (refer to 6.5).
Please note that for best possible performance the antenna should be directed away from
the application PCB as shown in Figure 24.
max.0,5
4,5
10
10
m
ax
.0
,5
10
15
no bare copper (exept solder pads for module)
no copper and components on any layer
no components on any layer
provide solid ground plane(s) as large as possible around
17
do not place any conductive parts in this area
20
20
40
area
Applic. PCB
Figure 24: S42/AI Placement Recommendation
6.5.
Housing Guidelines
The individual case must be checked to decide whether a specific housing is suitable for
the use of the internal antenna. A plastic housing must at least fulfill the following
requirements:
•
Non-conductive material, non-RF-blocking plastics
•
No metallic coating
•
ABS is suggested
6.6.
Antenna Issues
S42/AI comprises a ceramic antenna, which as a component is soldered to the
circuit board. This solution is functional for a S42/AI integrated into a plastic
housing.
The performance of the antenna must be checked within the final integration
environment. Adjacent PCBs, components, cables, housings etc. could otherwise
influence the radiation pattern or be influenced by the radio wave energy. It must be
ensured that the antenna is not co-located or operating in conjunction with any other
antennas, transmitters, cables, or connectors.
