The CMIBPF-27.5G-2G from Quantic Corry is a Band Pass Filter with Frequency 26.5 to 28.5 GHz, Insertion Loss 2 dB, Rejection 50 dB, Ripple 0.4 dB, Return Loss 15 dB. Tags: Module with Connectors, Suspended Substrate Filter. More details for CMIBPF-27.5G-2G can be seen below.