Specifications

Cinterion
®
EXS62-W/EXS82-W Hardware Interface Description
2.2 RF Antenna Interface
61
t EXS62-W_EXS82-W_HID_v01.200ee 2022-09-07
Public/ Released
Page 50 of 144
2.2.2 Antenna Installation
The antennas is connected by soldering the antenna pads (RF_OUT, ANT_GNSS) and its
neighboring ground pads directly to the application’s PCB.
Figure 23: Antenna pads (bottom view)
The distance between the antenna pads and their neighboring GND pads has been optimized
for best possible impedance. On the application PCB, special attention should be paid to these
pads, in order to prevent mismatch.
The wiring of the antenna connection line, starting from the antenna pad to the application an-
tenna should result in a 50
Ω line impedance. Line width and distance to the GND plane needs
to be optimized with regard to the PCB’s layer stack. Some examples are given in Section
2.2.3.
To prevent receiver desensitization due to interferences generated by fast transients like high
speed clocks on the application PCB, it is recommended to realize the antenna connection line
using embedded Stripline rather than Micro-Stripline technology. Please see Section 2.2.3.1
for an example.
1
For type approval purposes, the use of a 50Ω coaxial antenna connector (U.FL-R-SMT) might
be necessary. In this case the U.FL-R-SMT connector should be placed as close as possible
to EXSx2-W‘s antenna pad.
1. Please note that because of KDB 447498.GNSS, it is required to get a dedicated FCC ID, if using a PCB
printed antenna.
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GND
RF_OUT
GND
GND
ANT_GNSS
GND