The D1820221 from Microwave Circuits is a Diplexer with Frequency f1 1740 to 1840 MHz, Frequency f2 2205 to 2305 MHz, Attenuation 30 to 80 dBc, Attenuation f1 30 to 80 dBc, Attenuation f2 30 to 60 dBc. Tags: Module with Connectors. More details for D1820221 can be seen below.