LILY-W1 series - System integration manual
UBX-15027600 - R09
System description
Page 14 of 64
C1 - Public
1.6
Antenna interfaces
The LILY-W1 module series provides two different antenna interfaces based on part number
selection. The designer must follow the application notes in the Appendix B section for both versions
of the module:
•
LILY-W131 has a dedicated antenna pin that can be used to connect up to two antennas in
diversity mode.
•
LILY-W132 implements an internal antenna.
ANT
pin is not connected in LILY-W132 and antenna
diversity is not supported.
The following recommendations apply while developing an antenna interface for the LILY-W1 module:
•
Where possible, consider integrating in the end product the u-blox reference design to minimize
the effort on the certification process. See Appendix B for the full list of available reference
designs.
•
Good isolation must be provided between the various antennas in the system. Special care should
be taken to maximize isolation between antennas operating in the same or nearby bands.
See section 2.2 for information on how to properly design circuits that are compliant with these
requirements.
1.6.1
Approved antenna designs
LILY-W1 modules come with a pre-certified design that can be used to save costs and time during the
certification process. To minimize this effort, the customer is required to implement antenna layout
according to u-blox reference designs provided in Appendix B. u-blox can provide reference design
source files on request.
The module has been tested and approved for use with the antennas listed in the
LILY-W1 series Data
Sheet [1].
The module may be integrated with other antennas. In this case, the OEM installer must certify his
design with respective regulatory agencies.
See section 5 for more information about the certification process.
1.7
Other remarks
1.7.1
Unused pins
LILY-W1 modules have pins reserved for future use (
NC
) that must be left unconnected on the
application board.