The ECA12990P540C72A from ECHO Microwave is a Band Pass Filter with Frequency 12.72 to 13.26 GHz, Insertion Loss 1.5 dB, Rejection 72 dB @ 10500MHz, Ripple 0.8 dB, Return Loss 20 dB. Tags: Cavity Filter. More details for ECA12990P540C72A can be seen below.