SWF-17418450-06-L1 is a D band waveguide lowpass filter with a passband frequency from 110 to 170 GHz and a rejection frequency from 180 to 220 GHz. The nominal insertion loss of the filter is 4.0 dB and the typical rejection is 50 dB. Since the high-end cutoff frequency can be changed by modifying the design, custom designs can be offered under different model numbers.