Quantic PMI Model DTA-0R4G18G-60-CD-1 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 0.4 to 18.0 GHz. This model is offered in a slim line housing measuring only 0.5" in height. https://www.quanticpmi.com/product-details/dta-0r4g18g-60-cd-1
