Key Specifications, Waveguide Size: WR-28, Frequency, Min: 26.5 GHz, Frequency, Max: 40 GHz, Beam Width V: 360, Beam Width H: 10. WR-28 Waveguide Omni-directional Antenna, 26.5 GHz to 40 GHz Frequency Range, 7.5 dBi Gain, UG-599/U Flange. PEWAN1133 WR-28 omni-directional gain horn antenna is also known as a waveguide horn. This WR-28 omni-directional gain horn antenna has a 7.5 dBi nominal gain and a square cover flange. Our 7.5 dBi WR-28 horn antenna has a minimum frequency of 26.5 GHz and a maximum frequency of 40 GHz. WR 28 omni-directional gain horn waveguide antenna PEWAN1133 has a vertical beam width of 360 and horizontal of 10 degrees at 3 dB. This WR-28 omni-directional gain horn antenna with 7.5 dBi is part of over 40,000 RF, microwave and millimeter wave components available from Pasternack. Our WR-28 waveguide horn antenna can ship worldwide the same day as it is purchased as with our other available RF parts.