EVK-LILY-W1 - User Guide
UBX-15030290 - R04
Board description
Page 11 of 25
3.4.2
Antenna diversity
Antenna diversity can be evaluated using the U.FL coaxial connectors J4 and J5, after populating C12
instead of C13 on the evaluation board
1
. Connect two external 2.4 GHz antennas to J4 and J5.
Antenna selection for diversity is controlled by the ANT.SEL and ANT.SEL-N signals from the LILY-
W131 module. These signals can be monitored on the pin header J3 (see Table 10).
3.4.3
LTE filter
The LILY-W131 module includes a standard SAW bandpass filter. A BAW filter for Wi-Fi and LTE co-
existence (Triquint 885071) is included on the evaluation board in the antenna path to the J5 U.FL
connector by default (FL1), when using the antenna diversity configuration. The filter can be disabled
by populating C18 and C20 instead of C19 and C21. For evaluating the performance of the LTE filter,
the signals ANT.SEL and ANT.SEL-N on the pin header J3 can be tied to fixed values to manually
select one antenna path. R7 and R8 must be removed first to disconnect the switching control from
the LILY-W131 module. Table 11 lists the possible signal states for selecting one of the antenna
paths.
ANT.SEL
ANT.SEL-N
Selected antenna connector
GND
VCC
J5 (with LTE filter)
VCC
GND
J4 (without LTE filter)
Table 11: Antenna selection
3.5
LED
Table 12 lists the available LED on the EVB-LILY-W1 evaluation board:
Function
Description
Name
Color
Main power
Main power supply (VCC) status indication
LD1
Green
Table 12: LED description
1
Refer to the schematics in section 3.6 and assembly drawing in section 3.7 to find the location of the components.
