The RF Board is convenient for international shipping since it is packaged in QFN.high power RF circuit boards with 20 pins are designed.RF Type Receiver from the Evaluation board.
SI4735-D60-EVB Features
Packed in QFN 20 pins Receiver Type
SI4735-D60-EVB Applications
There are a lot of Silicon Labs SI4735-D60-EVB RF Boards applications.