PMI Model No. DTA-0R5G18G-60-CD-4 is a non-reflective, 10 bit, programmable 60 dB pin diode attenuator with step resolution as low as 0.06 dB over the frequency range of 0.5 to 18.0 GHz.  Insertion Loss of 4.8 dB; VSWR of 2.0:1; Flatness up to ±3.0 dB; Accuracy of Attenuation of ±2.0 dB; Operating Power of 15 dBm; Survival Power of 1 W; and Switching Time On/Off of 1.0 µs/0.5 µs.  This model uses DC Power Supply of +15 V @ 150 mA; contains SMA female connectors and 15 Pin Micro-D female connector in a housing: 2.00" x 1.80" x 0.40".   https://www.pmi-rf.com/product-details/dta-0r5g18g-60-cd-4