The HA-03M06G-NF is a professional-grade Double-Ridged Broadband Horn Antenna engineered and manufactured by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for mission-critical RF measurement and high-power verification cycles. Operating across an ultra-broadband frequency spectrum within the continuous 300 MHz to 6 GHz range, this premium antenna delivers exceptional Signal Integrity with gain characteristics extending from -6 dBi up to 20 dBi. Robustly CNC-machined from aerospace-grade 6061 Aluminum alloy panels with an integrated DC short lightning path, it successfully handles continuous wave (CW) power loads up to 500 Watts and 800 Watts peak power while protecting high-value connected measurement instrumentation. Equipped with a precision stainless steel N-Female coaxial connector interface, this heavy-duty radiator ensures minimal return loss, flat gain characteristics, and unwavering pattern stability, making it an essential instrument for laboratory EMC/EMI testing, automated antenna calibration ranges, radar detection, and high-fidelity spectrum surveillance systems requiring industrial-strength reliability under continuous duty cycles.