Quantic PMI Model DTA-18G40G-60-CD-1 is a 11 Bit programmable 60 dB digital attenuator with step resolution as low as 0.05 dB over the frequency range of 18 to 40 GHz. Offers an insertion loss of 11 dB, VSWR of 2.5:1, 1 µs switching speed, flatness of ±3 dB, ±0.75 dB attenuation accuracy and power handling: 24 dBm.  This model is offered in a slim line housing measuring 2.0" x 1.8" x 0.5" with 2.92mm female connectors. https://www.quanticpmi.com/product-details/dta-18g40g-60-cd-1