The WI-112-UBR-15E is a laboratory-grade microwave E-Plane Sectoral Horn Antenna professionally engineered by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for specialized radiation pattern shaping and calibration routines across the 7.05 GHz to 10.0 GHz X-Band spectrum. By flaring specifically within the vertical E-plane geometries, this premium sectoral instrument enforces an ultra-wide asymmetrical illumination path, delivering a massive 90° H-plane spatial coverage while simultaneously preserving a tightly focused 16° E-plane beamwidth aperture. Precision CNC machined from high-grade structural aluminum alloy in Taiwan, the radiator maintains a calibrated directive gain profile of 15 dBi combined with an exceptionally low maximum V.S.W.R threshold of 1.3 : 1. Equipped with a standardized rectangular square UBR Style cover flange layout, this robust 390 g component ensures flawless electromechanical coupling and safely manages continuous wave power loads up to 500 Watts (CW). This optimized structural architecture avoids destructive field distortion modes, rendering it the definitive choice for wide-area electromagnetic susceptibility sweeps, EMI/EMC testing, multi-point tactical links, radar simulation networks, and mission-critical Signal Defense field installations.