The AT-BPF-8088-12 from AT Microwave is a Waveguide Filter with Frequency 80 to 88 GHz, Insertion Loss -2 to -1 dB, Operating Temperature -40 to 85 Degree C, Rejection -40 to -30 dB, Rejection Frequency 70 to 110 GHz. Tags: Band Pass. More details for AT-BPF-8088-12 can be seen below.