This paper presents the design of an 8 × 8 antenna array operating at 180 GHz for chip-to-chip and board-to-board communication. The work is developed as part of the E4C project, targeting high data rates and energy efficiency in short-range communication. The proposed system supports four communication links, demonstrating its compatibility for energy-efficient applications in high-performance computing systems. By applying passive phase shifting and optimizing element spacing, the designed antenna achieves a minimum desired bandwidth of 30 GHz and a gain of 20.7 dB, 17.2 dB and 15 dB for link 1,2 (link 2 and 3 using the same antenna) and link 4 respectively. Simulation results validate the performance, ensuring minimal mutual coupling between elements.