The WI-19-UG-10 is a laboratory-grade Millimeter Wave (mmWave) Standard Gain Horn Antenna professionally engineered by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for high-fidelity directional transmission, wide-pattern spatial illumination, and advanced high-frequency diagnostics across the continuous 40 GHz to 60 GHz U-Band spectrum. Meticulously optimized to enforce strict parameter accuracy across broader diagnostic sectors, this premium horn antenna delivers a flat nominal directive gain profile of 10 dBi combined with an exceptionally low maximum V.S.W.R threshold of 1.3 : 1. Precision CNC machined from high-grade structural aerospace aluminum alloy in Taiwan, the advanced millimeter-wave launch architecture establishes an expansive radiation footprint, providing uniform -3dB wide-beam beamwidths of 54° in both the H-plane and E-plane matrices. Equipped with a standardized precision UG Flange compatible interface layout, this ultra-lightweight 10 g instrument ensures flawless electromechanical alignment, eliminates boundary signal leakage, and safely manages continuous wave power loads up to 150 Watts (CW). Its optimized microscopic structural tolerances avoid destructive field distortion modes, rendering it the definitive choice for broad-area automated spectrum surveillance matrices, millimeter-wave sensor testing setups, complex laboratory positioner configurations, and mission-critical Signal Defense field installations requiring uncompromised Signal Integrity paths.