0 pins are on the high power RF circuit board.Input RF type Multiplier of the Evaluation board.Using the HMC444 search parameter, you can discover variants of the RF Board.PCB is the one that mounts RF Board.
106137-HMC444LP4 Features
0 pins Multiplier Type
106137-HMC444LP4 Applications
There are a lot of Analog Devices Inc. 106137-HMC444LP4 RF Boards applications.