User's Guide

Wearable EVK User Guide
AN-21011301-E1
32
Ver.1.0.0
3. Bluetooth RF path selection
EVK has designed two RF paths, one is from the 9518 ANT pin to the onboard antenna through the LC matching
circuit.The other is that the 9518 ANT pin comes out through the RF PA to the SMA connector, and then
connects to the 2.4G whip antenna.
3.1 Chose onboard antenna
R51 does not place components (NC), R52 and L7 place 0R resistors.
Figure 3-1 Chose onboard antenna
3.2 Chose 2.4G whip antenna
No components (NC) are placed on R52, 0R resistors are placed on R51, and whip antennas are connected to
J1.