Microwave Filter introduces the aluminum version of its C-band waveguide bandpass filter. The unit has a typical insertion loss of 0.5 dB at the center frequency and 1.25 dB maximum (1.0 dB typical) at 3.7 GHz and 4.2 GHz. Suppression is 25 dB minimum at 3.65 GHz and 4.25 GHz, and 50 dB minimum below 3.55 GHz and above 4.35 GHz. Group delay variation is less than 8 ns typical, making it useful for digital applications. The 7892AL is 5.75 inches long (flange to flange). The flanges are rectangular CPR229G (grooved) and CPR229F (flat).