The high power RF circuit board is designed with 0 pins.Attenuator RF Type from the Evaluation board.Try searching with HMC424 if you're looking for variants.
EV1HMC424ALH5 Features
0 pins Attenuator Type
EV1HMC424ALH5 Applications
There are a lot of Analog Devices Inc. EV1HMC424ALH5 RF Boards applications.