The MHP18-40G from MISOTECH is a RF High Pass Filter with Frequency 18 to 40 GHz, Insertion Loss 2.5 to 2.7 dB, Power 1 W, Rejection 25 to 29 dB, Lower Rejection 25 to 29 dB @15 GHz. Tags: Die, MMIC Filter. More details for MHP18-40G can be seen below.