Open-ended rectangular waveguides are commonly used as near-field probes. The radiation characteristics of OEWG can be well predicted by analytical formuůas that facilitate a simplified probe pattern correction. OEWG is equipped with an integrated coaxial connector, absorber shield, and mechanical interface with a standardized mounting flange. The OEWG1831AA operates on frequencies from 17.7 GHz up to 31 GHz.