The Model 3164-10 Open Boundary Quad-ridged Horn Antenna's design makes this antenna unique in both appearance and performance. Designed to measure wireless devices for Over-The-Air (OTA) performance, this unit features excellent gain, with low VSWR. Numerically modeled, the 3164's open boundary design is similar to two double-ridged waveguide antennas placed orthogonally to each other, providing the ability to measure the two principal components of a radiating electric field.