0 pins are on the high power RF circuit board.Input RF type Mixer of the Evaluation board.Using the HMC292 search parameter, you can discover variants of the RF Board.
EV1HMC292ALC3B Features
0 pins Mixer Type
EV1HMC292ALC3B Applications
There are a lot of Analog Devices Inc. EV1HMC292ALC3B RF Boards applications.