The AT-BPF-4575-15 from AT Microwave is a Waveguide Filter with Frequency 45 to 75 GHz, Insertion Loss -3 to -1.5 dB, Operating Temperature -40 to 85 Degree C, Rejection -40 to -15 dB, Rejection Frequency 40 to 80 GHz. Tags: Band Pass. More details for AT-BPF-4575-15 can be seen below.