The WI-284-UAR-15E is an advanced, industrial-grade S-Band Sector Horn Antenna professionally engineered by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for mission-critical surveillance, tactical monitoring, and high-power RF deployments across the continuous 2.6 to 3.95 GHz frequency spectrum. Meticulously optimized to enforce exceptional spatial coverage accuracy, this premium horn antenna delivers a predictable nominal gain profile of 15 dBi combined with an exceptionally low maximum V.S.W.R threshold of 1.25 : 1. Precision CNC machined from high-grade aluminum with stainless steel interfaces in Taiwan, the specialized sectoral launch geometry establishes an ultra-wide horizontal footprint, providing an 80° H-plane -3dB beamwidth paired with a precise 12° vertical focused envelope to eliminate unwanted signal spillover. Equipped with a standardized precision UAR Waveguide Flange mating face with a standard WR-284 interface layout, this robust 1900g instrument ensures flawless, leak-free electromechanical coupling and safely manages continuous wave power loads up to 300 Watts (CW) with minimal thermal drift. Its optimized structural integrity avoids destructive field distortion modes under complex tracking layouts, rendering it the definitive choice for wide-area spectrum surveillance matrices, automated antenna calibration setups, radar validation deployments, and mission-critical Signal Security infrastructure arrays.