HJX-ADRV9026-X2 is an evaluation platform for array antenna applications. The platform integrates two ADRV9026 chips, which can realize the function of 8 receiving and 8 sending. Support frequency range 70MHz to 6GHz, enabling RX and TX bidirectional signal processing. In order to ensure the phase synchronization on the hardware, the hardware design of the two-chip ADRV9026 is synchronized.