The GBDKA1819 from GeoSat Microwave is a Low Noise Block with Input RF Frequency 18.2 to 19.2 GHz, Output RF Frequency 950 MHz to 1.95 GHz, LO Frequency 17.25 GHz, Gain 22 to 28 dB, Gain Flatness 4 to 5 dB. More details for GBDKA1819 can be seen below.