The WI-1500-UDR-10 is an industrial-grade, large-scale microwave Standard Gain Horn Antenna professionally engineered by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for ultra-high power directional transmission and calibration routines across the 490 MHz to 740 MHz low-frequency UHF spectrum. Meticulously optimized to manage extreme thermal and electromechanical strain, this heavy-duty radiator delivers a flat nominal directive gain profile of 10 dBi paired with exceptional phase center stability. Precision manufactured from high-grade structural aluminum alloy in Taiwan to satisfy stringent measurement certifications, the massive horn flare architecture establishes a highly uniform and symmetric radiation footprint, providing uniform -3dB beamwidths of 54° in both the H-plane and E-plane matrices. Equipped with a standardized large-scale square UDR Style waveguide flange layout for direct connection without adapters, this robust 15.65 kg instrument features an integrated Waterproof Structure to secure dependable all-weather outdoor continuous operation, safely managing continuous wave power loads up to 5000 Watts (5 KW). This optimized structural geometry renders it the definitive choice for high-intensity field strength generation, extreme EMI/EMC compliance sweeps, anechoic antenna calibration ranges, and mission-critical Signal Defense infrastructure arrays.