The WI-340-UDR-20 is a premium, high-performance WR-340 Waveguide Horn Antenna professionally engineered by Fei Teng Wireless Technology Co., Ltd. (FT-RF) for S-Band microwave applications within the continuous 2.2 GHz to 3.3 GHz frequency spectrum. Optimized for professional Signal Security operations and high-intensity laboratory diagnostic testing, this instrument effortlessly handles robust continuous wave power loads up to 1000 Watts (CW) while delivering a precise, intensified nominal gain profile of 20 dBi combined with an exceptionally low maximum V.S.W.R threshold of 1.25 : 1. Precision CNC machined from aerospace-grade structural alloys in Taiwan, the calculated internal waveguide geometry establishes symmetrical beamwidths (30° H-plane x 29° E-plane), providing outstanding boresight accuracy and minimum return loss metrics. Equipped with a standardized precision UDR Style Waveguide Flange interface layout, this robust 5.0 kg instrument guarantees outstanding electromechanical longevity and excellent thermal dissipation. It stands as the definitive choice for wide-area radar simulation, automated antenna calibration setups, advanced Signal Defense deployments, and high-field laboratory anechoic measurements demanding uncompromised performance parameters.