The HA-02M03G-NF is a high-performance Double-Ridged Broadband Horn Antenna professionally engineered and manufactured by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for ultra-wideband RF applications and high-fidelity radiation screening. Operating within a massive sub-GHz to microwave spectrum across the continuous 200 MHz to 3 GHz frequency range, this premium antenna provides a stable and consistent gain profiling from 3 dBi up to 12 dBi. Built with aerospace-grade 6061 Aluminum alloy panels and precision-machined inner ridges, it ensures minimal impedance mismatch and low return loss metrics paired with a maximum V.S.W.R threshold of less than 2.0 : 1. Available with premium high-power coaxial interconnects including standard N-Female or heavy-duty 7/16-Female (7/16 DIN) interfaces, this industrial-grade antenna safely manages continuous wave (CW) power loads up to 1000 Watts. It stands as an indispensable reference instrument for automated antenna gain calibration ranges, broad-area spectrum surveillance tracking, laboratory Signal Integrity verification, and professional EMI/EMC compliance validation environments requiring extreme structural rigidity under continuous industrial duty cycles.