RF band reject filters are tuned circuits that prevent the passage of signals within a specified band of frequencies.

RF filters and microwave filters are devices that pass or reject signals by frequency.

RF band pass filters are active or passive circuits that pass signals from a specific frequency band and reject signals from out-of-band frequencies.

RF high pass filters pass signals from high frequencies and reject signals from low frequencies

RF low pass filters pass signals from low frequencies and reject signals from high frequencies

Long pass filters transmit a wide spectral band of long wavelength radiation while blocking short wavelength radiation.

Active band reject filters are tuned circuits that prevent the passage of signals within a specified band of frequencies.