PMI Model No. SDLVA-50M18G-70 is an SDLVA (successive detection logarithmic video amplifier) operating in the 50 MHz to 18 GHz frequency band. It features a built in voltage variable threshold detector circuit that is set up to match the video output voltage to within 5%. 

In addition, this model has a TSS of -70 dBm and a dynamic range of 70 dB, all in a package measuring only 2.3" x 2.2" x 0.4" with SMA female connectors.

http://www.pmi-rf.com/Products/SDLVA/SDLVA-50M18G-70.htm