The WI-90-UBR-10E is an industrial-grade WR90 E-Plane Sector Waveguide Horn Antenna professionally engineered and manufactured by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for high-performance transmission and microwave validation scanning. Operating within the high-frequency X-Band spectrum across the continuous 8.2 GHz to 12.4 GHz band, this premium sectoral antenna is expertly flared in the E-plane to deliver a stable linear nominal gain of 15 dBi. Featuring a direct Waveguide input interface with a standardized UBR-UG-39/U flange mating face, it ensures flawless structural impedance coplanarity and ultra-low-loss power transfer, safely managing continuous wave power loads up to 500 Watts (CW). Precision CNC machined from high-grade structural aluminum alloy in Taiwan, it exhibits exceptional electromechanical longevity, a lightweight 180g profile, and highly stable radiation patterns paired with a maximum V.S.W.R threshold of 1.3. It stands as the definitive choice for radar systems, advanced satellite communication networks, automated antenna characterization ranges, and specialized EMC laboratory testing frameworks demanding uncompromised performance parameters.