The WR62 Standard Gain Horn Antenna is a laboratory-grade microwave reference instrument professionally engineered by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for high-fidelity directional transmission, radar benchmarking, and anechoic calibration routines across the 12 GHz to 18 GHz Ku-Band spectrum. Meticulously optimized to enforce strict path precision, this high-performance horn architecture delivers a highly concentrated directional radiation envelope with a narrow horizontal beamwidth of 10° and a vertical beamwidth of 11°, operating with an exceptionally low average V.S.W.R profile of 1.3 : 1. Precision manufactured from high-grade structural aluminum alloy in Taiwan to satisfy rigorous industrial RF testing metrics, this lightweight 600 g radiator incorporates a standardized square UBR UG-2664/U cover flange interface equipped with integrated M4 mounting screw points. This optimized structural geometry avoids field distortion modes, ensuring absolute phase stability and repeatable reference criteria for indoor chamber evaluations, satellite diagnostics, antenna measurement ranges, and mission-critical high-frequency testing applications.