Gemalto M2M GmbH PLAS9-X Manuale Utente
Cinterion
®
PLAS9-X Hardware Interface Overview
2.2 GSM/UMTS/LTE Antenna Interface
22
PLAS9-X_HIO_v00.044
2017-09-19
Confidential / Preliminary
Page 19 of 39
2.2.2.2
Routing Examples
Interface to RF Connector
shows a sample connection of a module‘s antenna pad at the bottom layer of the mod-
ule PCB with an application PCB‘s coaxial antenna connector. Line impedance depends on line
width, but also on other PCB characteristics like dielectric, height and layer gap. The sample
stripline width of 0.40mm is recommended for an application with a PCB layer stack resembling
the one of the PLAS9-X evaluation board. For different layer stacks the stripline width will have
to follow stripline routing rules, avoiding 90 degree corners and using the shortest distance to
the PCB’s coaxial antenna connector.
width, but also on other PCB characteristics like dielectric, height and layer gap. The sample
stripline width of 0.40mm is recommended for an application with a PCB layer stack resembling
the one of the PLAS9-X evaluation board. For different layer stacks the stripline width will have
to follow stripline routing rules, avoiding 90 degree corners and using the shortest distance to
the PCB’s coaxial antenna connector.
Figure 7: Routing to application‘s RF connector
e.g.
ANT_
MAIN
MAIN
G N D
G N D
Edge of module PCB
Stripline (50 ohms) on top
layer of evaluation board from
antenna pad to module edge
Width = 0.40 mm
E.g., U.FL antenna
connector
50 ohms microstrip line
G N D
G N D
Ground connection
G N D
G N D