The AE4500SSH6556 from Anatech Electronics is a RF High Pass Filter with Frequency 4.5 to 21 GHz, Insertion Loss 1 to 2 dB, Power 15 W, Rejection 60 dB@DC-3.98 GHz, VSWR 1.50:1, 1.70:1. Tags: Module with Connectors, Suspended Substrate Filter. More details for AE4500SSH6556 can be seen below.