MM516
User's Manual
50
Revision 1.4 7-8-2011
Hardware Description Manual
8 Important Application Information
8.1 Antenna Trace and Connector Information
The MM516 has been tested and certified for use with two different connecting micro-strip traces and styles of connectors.
The micro-strip traces have been designed to have a characteristic impedance of 50 ohms, running from the module to
surface mount SMA connectors for connecting to external antennas. The module must be installed on PCBs that conform to
the following guidelines:
Six layer PCB – the following layer stack should be used:
Figure 25 Six Layer Stackup
Four layer PCB – the following layer stack should be used:
Figure 26 Four Layer Stackup
Two sheets of 2116 FR-4 material with an Er (dielectric constant) of 4.5 +/-.1 shall be used to separate each layer pair. The
micro-strip trace shall be placed on either the top or bottom outer layers of the PCB with a ground plane directly beneath it.
The trace shall have a width of .0141” with a manufacturing tolerance of +/- 15% and a maximum length of 1.279”.
PCBs designed for use with this module shall use one of the following design layouts shown below which represent the
included Gerber files.
