The 4034C coaxial microwave 90° hybrid coupler from Narda is a miniature stripline device that is rugged, offers high isolation, and resists shock and vibration. The device has coupling of 3 dB, operates from 4 to 8 GHz, handles 50 W average and 5 kW peak power, and has isolation of at least 20 dB. Insertion loss is 0.3 dB or less and VSWR is 1.25:1 or less. Amplitude balance is ±0.6 dB; phase balance is 10°. The coupler measures 1 x 0.5 x 0.36 in, weighs 0.6 oz, and has female SMA connectors. The unit meets military requirements for shock and vibration and has an operating temperature range of -54 to +105°C.