Passive band elimination filter

The utility model is suitable for the technical field of passive band-stop filters, and provides a passive band-stop filter, which is characterized in that first ends of two resonance attenuation modules are electrically connected with a common node formed between two adjacent resonance filtering modules in three resonance filtering modules connected in series, and the first ends of the two resonance attenuation modules are electrically connected with a common node formed between two adjacent resonance filtering modules in the three resonance filtering modules connected in series; and the second end of the resonance attenuation module is grounded, so that the passive band elimination filter provided by the utility model can attenuate clutter signals with preset passband frequency in radio frequency signals through the resonance attenuation module, the frequency of the radio frequency signals is adjusted through the three resonance filtering modules which are connected in series, and meanwhile, the frequency o