The 18101 from Microwave Filter Company is a Diplexer with Frequency f1 1.71 to 1.85 GHz, Frequency f2 2.2 to 2.5 GHz, Insertion loss 0.5 dB, Frequency 1.71 to 1.85 GHz / 2.2 to 2.5 GHz, Isolation 75 dB. Tags: Module with Connectors. More details for 18101 can be seen below.