The Model 3112 Double-Ridged Waveguide Horn is a linearly polarized broadband antenna providing high gain and excellent VSWR characteristics over a broadband frequency. The 3112 is especially effective for generating high electromagnetic fields with relatively low power input. Its high gain makes it suitable for generating the high fields (200 V/m) necessary per the ISO 11451-2 and SAE J551/11 full-vehicle automotive radiated immunity standards with less than 2 kW. It is also acceptable for MIL-STD-461 bringing the desirable performance of this type of antenna lower frequencies.