Quantic PMI Model PCG-12-0DBM-12V-SFF is a 1 to 2 GHz RF input, 1 to 26 GHz output comb generator. The small size active unit allows input power of only 0 to +5 dBm and is powered with +12 V. Specifications include RF input power 0 to +5 dBm; output frequency range 1 to 26 GHz; output power -20 dBm; and input VSWR 1.8:1.  Housing size is 1.0" x 0.655" x 0.380" with SMA female connectors.  https://www.quanticpmi.com/product-details/pcg-12-0dbm-12v-sff