The WI-137-UDR-10 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 5.85 GHz to 8.2 GHz C-Band spectrum. Meticulously optimized to enforce strict parameter accuracy, this premium horn antenna delivers a flat nominal directive gain profile of 10 dBi combined with an exceptionally low maximum V.S.W.R threshold of 1.3 : 1. Precision CNC machined from aerospace-grade structural aluminum alloy in Taiwan, the advanced horn flare geometry establishes a highly uniform radiation footprint, securing excellent thermal stability and uncompromised Signal Integrity. Equipped with a standardized rectangular UDR Style Flange layout, this robust structural component ensures flawless electromechanical coupling, eliminates boundary signal leakage, and safely manages massive continuous wave power loads up to 800 Watts (CW). This optimized layout avoids destructive field distortion modes, making it the definitive choice for rigorous EMI/EMC testing, anechoic antenna measurement ranges, satellite feed monitoring, and mission-critical Signal Defense configurations.