LowPass HighPass Filter

A LowPass filter (LPF) is a passive RF device that passes signals below its cutoff frequency while attenuating all signals above it. A LowPass filter should be used when you want to eliminate – remove higher frequencies – harmonics.

HighPass filter (HPF) is a passive RF device that passes signals above a certain “cutoff” frequency while rejecting unwanted signals below the cutoff frequencies. A highpass filter should be used when you want to eliminate – remove lower frequencies.