The WI-137-UAR-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 broad signal coverage across the 5.85 GHz to 8.2 GHz C-Band spectrum. As the most compact solution within the FT-RF WR137 series, this palm-sized radiator 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 high-grade structural aluminum alloy in Taiwan, the advanced horn flare geometry establishes an expansive illumination path, providing wide matching -3dB beamwidths of 56° in the H-plane and 54° in the E-plane matrix. Equipped with a standardized rectangular UAR Flange layout, this ultra-lightweight 170 g component ensures flawless electromechanical coupling, eliminates the need for bulky transition adapters, and safely manages continuous wave power loads up to 800 Watts (CW). Its optimized structural footprint avoids destructive field distortion modes, making it the definitive choice for initial area scanning, wide-angle monitoring, EMI/EMC diagnostics, anechoic measurement ranges, and mission-critical Signal Defense configurations.