The HA-025M12G-NF is a high-performance Double Ridged Broadband Waveguide Horn Antenna professionally engineered and manufactured by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for demanding multi-octave microwave measurement and high-power verification applications. Operating across an ultra-broadband frequency spectrum spanning the continuous 250 MHz to 12 GHz range, this laboratory-grade antenna provides high gain characteristics extending from 2 to 14 dBi. Precision CNC-machined from premium structural aluminum with optimized inner double ridges, it delivers pure, predictable radiation patterns and an optimized low VSWR performance profile. Equipped with a high-precision stainless steel N-Female coaxial connector interface, this heavy-duty antenna safely manages massive power loads up to 600 Watts of continuous wave (CW) input and 1 KW peak power. It stands as an essential, definitive reference instrument for professional laboratory EMC/EMI compliance testing, high-fidelity anechoic chamber field strength generation, antenna gain calibration ranges, and advanced broadband signal monitoring operations.