The WI-284-UAR-10E is an advanced, industrial-grade C-Band Sectoral Horn Antenna professionally engineered by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for wide-angle area monitoring, high-power tactical deployments, and high-intensity laboratory RF measurements across the continuous 5.85 GHz to 8.2 GHz frequency spectrum. Meticulously optimized to enforce exceptional spatial coverage accuracy, this premium horn antenna delivers a predictable nominal 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 aluminum alloy in Taiwan, the specialized sectoral launch geometry establishes an ultra-wide horizontal footprint, providing a 112° H-plane -3dB beamwidth paired with a focused 28° elevation envelope. Equipped with a standardized precision UAR Waveguide Flange mating face with a standard WR-284 interface layout, this robust 1250 g instrument ensures flawless, leak-free electromechanical coupling and safely manages continuous wave power loads up to 800 Watts (CW) with excellent thermal dissipation. 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.