Narda’s Model 4797 miniature variable attenuator provides attenuation of 0-45 dB, with low insertion loss and operation over an extended temperature range. The unit covers dc to 18 GHz and measures 2.64 x 3.25 x 1 in and weighs 12 oz. It handles 10 W average and 3 kW peak power. Voltage standing wave ratio is 1.3:1 or less; insertion loss is less than 1 dB, and frequency sensitivity is ±1.5 dB. Connectors are SMA female.