The QHF-4300-18000-30 from Qualwave is a RF High Pass Filter with Frequency 4.3 to 18 GHz, Bandwidth 13700 MHz, Insertion Loss 1.2 dB, Rejection 30 dB, Lower Rejection 30 dB @ DC to 3.8 GHz. Tags: Module with Connectors. More details for QHF-4300-18000-30 can be seen below.