The PDBF-5R25/5R75-5D3 from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 5.25 to 5.75 GHz, Center Frequency 5.5 GHz, Insertion Loss [email protected], Rejection =30 dB @4.8&6.3 GHz, Upper Rejection 30 dB. Tags: Surface Mount. More details for PDBF-5R25/5R75-5D3 can be seen below.