A new line of waveguide antennas was designed to address wireless communication applications covering 40 to 220 GHz bands, including test and measurement, R&D, military/aerospace, and experimental radar. It is comprised of 85 new models covering a broad spectrum of millimeter wave frequencies (40 to 220 GHz). The waveguide sizes of these antennas range from WR5 to WR19 and deliver gain from 3.5 to 25 dBi nominal, depending on the model. This new product line encompasses five categories of ultra-high frequency waveguide antennas to address point-to-point and point-to-multipoint wireless applications: standard gain horn and conical gain horn antennas to 220 GHz, along with omni-directional, horn lens, and wide-angle scalar feed horn antennas to 99 GHz. Additionally, these new waveguide antennas are RoHS and REACH compliant.