The GBDKA2021 from GeoSat Microwave is a Low Noise Block with Input RF Frequency 20.2 to 21.2 GHz, Output RF Frequency 950 MHz to 1.95 GHz, LO Frequency 19.25 GHz, Gain 22 to 28 dB, Gain Flatness 4 to 5 dB. More details for GBDKA2021 can be seen below.