u/Failed_Engineer-EEE

I am intern i was some filter issue the thing is i need attenuation of 75db at 50Mhz but i only getting 64db i dont know what is the problem i tried few things but no change in 50Mhz range

The frequency vs attenuation table is what i need ignor 1Ghz frequency attenuation what ever i get is fine in that region i concern about 50Mhz

Strecture:-pi [low pass]

Components:-ferrite bead(beads-on-leads)[part no. 2743001112] capacitor=4.7nf

Note:-i cant use other ferrite beads due size restriction which is (OD=3.5mm,ID=0.8mm,L=4.5mm) i have seen another bead for same but not tested but has same impedance as the bead i am using (part no. B-30L-34)

1.i am testing properly

2.if not what is the mistake

3.have i selected proper components