User's Guide

BL28EU-RD1 OEM Manual and User Guide
5
6.2 RF Traces for antennas
The NAD has three antenna pins.
• PRIMARY_ANT
• SECOND_ANT
• GNSS_ANT
The figure below shows the general breakout of the module:
Figure 6-2: NAD Pin Breakout
The LTE CAT4 NAD should be oriented on the main board to minimize the length of the PRIMARY_LTE
antenna pin (LTE Ant1). This 50ohm line should be as short as possible to the external RF connector or
internal antenna feed point.