0 pins are on the high power RF circuit board.Input RF type Amplifier of the Evaluation board.Using the HMC548 search parameter, you can discover variants of the RF Board.PCB is the one that mounts RF Board.
113979-HMC548LP3 Features
0 pins Amplifier Type
113979-HMC548LP3 Applications
There are a lot of Analog Devices Inc. 113979-HMC548LP3 RF Boards applications.