The OBH-230 from RF Echo is a Dual Ridged Horn Antenna that operates from 0.2 to 3 GHz. It comprises a coaxial to double-ridge waveguide (DRW) transition and a free-space matching section. An exponentially-tapered matching section is employed and optimized to achieve a smooth transition and a good impedance match to the free space. This 50-ohm antenna supports linear polarized waveforms and contains only one single main lobe over the entire frequency range without any other side lobes. It provides a gain of 10.5 dB and has a VSWR of less than 2:1. The antenna is calibrated in line with ANSI C63.5-2006, making it ideal for EMC/RF measurements.

The OBH-230 is suitable for use in calibration systems, and antenna test systems can be applied to reflective antenna feeds and can also support a variety of mobile communications. It can be used as a soil sensor to improve the efficiency of modern farmers in crop production and to measure the thickness of snow and ice, to determine the structure of concrete. This antenna can also be applied to the online flow measurement of rivers and be utilized to support radar for archaeological detection to play a more significant role. It is available in an enclosure that measures 1068 x 591 x 871 mm and weight 22.2 Kg.