Patent ID: 7135866

Claim:
Multifrequency power circuit of a coil, comprising: a coil ( 2 ) with two ends, two principal power or transmission line segments ( 3 , 3 ′), each principal line segment ( 3 , 3 ′) comprising at least an attached conductor segment ( 4 , 4 ′) attached to one of the ends of said coil, the attached conductor segments ( 4 , 4 ′) constituting, with said coil, a first oscillating circuit ( 5 ) that exhibits a determined first resonance frequency, wherein, said principal line segments ( 3 , 3 ′) further comprise controlled-impedance multiconductor line segments, each multiconductor line segment comprises a non-attached conductor segment ( 6 , 6 ′) that is not attached to said coil ( 2 ) and that extends into said principal line segment ( 4 , 4 ′) and that exhibits with the corresponding attached conductor segment ( 4 , 4 ′), a capacitive coupling that is distributed along conductor segments that are located beside said attached and non-attached conductor segment ( 4 , 4 ′ and 6 , 6 ′), said non-attached conductor segments ( 6 , 6 ′), together with the coil ( 2 ) and the attached conductor segments ( 4 , 4 ′) and with additional power line segments ( 7 , 7 ′; 8 , 8 ′) that are connected to said non-attached conductor segments ( 6 , 6 ′), form a second oscillating circuit ( 9 ) that has a second resonance frequency that is different from the first resonance frequency of the first oscillating circuit ( 5 ), and each of said first and second oscillating circuits ( 5 , 9 ) is looped to a respectively adjustable tuning circuit ( 11 , 11 ′), and is powered by a corresponding respective primary power circuit ( 12 , 12 ′) via a transfer of energy by one of magnetic coupling with at least one of two attached conductor segments ( 4 , 4 ′), capacitive coupling with at least one of two non-attached conductor segments ( 6 , 6 ′), and magneto-capacitive coupling of said primary power circuit ( 12 , 12 ′) with at least one of the additional line segments ( 7 , 7 ′; 8 , 8 ′) that are part of the second oscillating circuit ( 9 ).