The WI-090-A1-15 is a high-performance WR90 Waveguide Horn Antenna expertly engineered and manufactured by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for precise high-frequency systems. Operating within the X Band spectrum across the continuous 8.2 GHz to 12.4 GHz range, this industrial-grade radiator provides a highly consistent directional nominal gain of 15 dBi. Featuring a direct waveguide interface layout with a standardized UBR UG-39/U flange mating face, it ensures flawless structural impedance integration and ultra-low-loss power transfer. Precision structured from lightweight aluminum alloy in Taiwan, it exhibits exceptional mechanical longevity, an ultra-lightweight 98g profile, and excellent radiation patterns paired with a maximum V.S.W.R threshold of 1.3:1. It stands as the definitive choice for broad-area indoor testing configurations, antenna characterization ranges, industrial EMI/EMC verification setups, and advanced radar instrumentation networks.