The XBF-24-D+ from Mini Circuits is a Band Pass Filter with Frequency 19.5 to 20.5 GHz, Bandwidth 500 MHz, Center Frequency 20000 MHz, Insertion Loss 4.2 dB, Rejection 49 to 76 dB. Tags: Die, Reflectionless Filter. More details for XBF-24-D+ can be seen below.