RF Transceiver' mounting is done according to the Surface Mount method.There is an optimized performance in this RF Transceiver module because it utilizes the Strip package.
WT11U-E-AI56IAPC Features
Surface Mount Strip package
WT11U-E-AI56IAPC Applications
There are a lot of Silicon Labs WT11U-E-AI56IAPC RF Transceiver Modules applications.