The SWF-54301340-15-B1 from ERAVANT is a Waveguide Filter with Frequency 53.50 to 54.50 GHz, Insertion Loss 2.5 to 3 dB, Operating Temperature -40 to 85 Degree C, Rejection 40 dB. Tags: Band Pass. More details for SWF-54301340-15-B1 can be seen below.