Patent ID: 9254377
Filing Date: 2016-02-09
CPC Classification: A61N,H01F,H03H

Claim Text:
1. A resonant multilayer helical wave filter, comprising: a) an electrical conductor, comprising: b) a dielectric material contacting at least the first and second helically wound inductor segments and the return segment, c) wherein the first and second helically wound inductor segments are wound in the same longitudinal direction and the first and second planar surfaces are substantially aligned facing each other in either a co-axial or co-radial relationship along their respective first and second lengths to thereby provide a bandstop filter inductance and a bandstop filter capacitance comprising a parasitic capacitance formed between the first and second planar surfaces that is sufficient to attenuate a first MRI RF pulsed frequency at or near a first RF resonant center frequency or range of frequencies.