Key Specifications, Waveguide Size: WR-137, Gain Min: 20, Flange Size: Square Cover, Frequency, Min: 5.85 GHz, Frequency, Max: 8.2 GHz, Beam Width V: 18.8, Beam Width H: 18.7. WR-137 Standard Gain Horn Antenna Operating From 5.85 GHz to 8.2 GHz With a Nominal 20 dB Gain With Square Cover Flange. PE9859-20 WR-137 standard gain horn antenna is also known as a waveguide horn. This WR-137 standard gain horn antenna has a 20 dB nominal gain and a square cover flange. Our 20 dB WR-137 horn antenna has a minimum frequency of 5.85 GHz and a maximum frequency of 8.2 GHz. WR-137 standard gain horn waveguide antenna PE9859-20 has a vertical beam width of 18.8 and horizontal of 18.7 degrees at 3 dB. This WR-137 standard gain horn antenna with 20 dB is part of over 40,000 RF, microwave and millimeter wave components available from Pasternack. Our WR-137 waveguide horn antenna can ship worldwide the same day as it is purchased as with our other available RF parts.