Systems and methods for manufacturing modified impedance coaxial cables including providing a coaxial cable having an inner conductor, a dielectric layer at least partially covering an outer surface of the inner conductor, and an outer conductor at least partially covering an outer surface of the dielectric layer. The coaxial cable may include a first section having a first impedance configured to allow a first frequency band to pass. A discontinuity section may be formed in at least one of the inner conductor, the dielectric layer, and the outer conductor. The discontinuity section may have an impedance different than the first impedance and a length which is configured to attenuate a second frequency band.