Key Specifications, Waveguide Size: WR-42, Gain Min: 20, Flange Size: Square Cover, Frequency, Min: 18 GHz, Frequency, Max: 26.5 GHz, Beam Width V: 17.8, Beam Width H: 17.5. WR-42 Standard Gain Horn Antenna Operating From 18 GHz to 26.5 GHz With a Nominal 20 dB Gain With Square Cover Flange. PE9852-20 WR-42 standard gain horn antenna is also known as a waveguide horn. This WR-42 standard gain horn antenna has a 20 dB nominal gain and a square cover flange. Our 20 dB WR-42 horn antenna has a minimum frequency of 18 GHz and a maximum frequency of 26.5 GHz. WR-42 standard gain horn waveguide antenna PE9852-20 has a vertical beam width of 17.8 and horizontal of 17.5 degrees at 3 dB. This WR-42 standard gain horn antenna with 20 dB is part of over 40,000 RF, microwave and millimeter wave components available from Pasternack. Our WR-42 waveguide horn antenna can ship worldwide the same day as it is purchased as with our other available RF parts.