The B280MD1S from Knowles is a Bandpass Filter with a passband from 26.5 to 29.5 GHz covering the n257 5G band. It has a passband insertion loss of less than 2.9 dB and provides more than 10 dB of rejection above and below the passband. This filter utilizes DLI’s low loss temperature stable materials which offer small size and minimal performance variation over temperature. It is available in a shielded surface-mount package that measures 4 x 2.3 x 1.8 mm.