The WI-102-UBR-15 is a laboratory-grade microwave Standard Gain Horn Antenna professionally engineered by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for high-fidelity directional transmission and calibration routines across the 7.0 GHz to 11.0 GHz X-Band spectrum. Meticulously optimized to enforce exceptional boresight accuracy paths, this premium horn antenna delivers a flat nominal directive gain profile of 15 dBi combined with an exceptionally low maximum V.S.W.R threshold of 1.3 : 1. Precision CNC machined from high-grade structural aluminum alloy in Taiwan, the advanced horn architecture establishes a highly concentrated and symmetric radiation footprint, providing narrow -3dB beamwidths of 28° in the H-plane and 29° in the E-plane matrix. Equipped with a standardized rectangular square UBR Style cover flange layout, this lightweight 170 g component ensures flawless electromechanical coupling and safely manages continuous wave power loads up to 500 Watts (CW). This optimized structural geometry avoids destructive field distortion modes, rendering it the definitive choice for precision far-field antenna measurements, EMI/EMC testing, anechoic range calibrations, and mission-critical Signal Defense field infrastructure arrays.