Patent ID: 8717138
Filing Date: 2014-05-06
Classification: H03H

Abstract:
1. An inductor comprising: a primary coil coaxially arranged and operated in parallel with at least one isolated secondary coil, each comprising at least one loop winding with two open-circuited ports, wherein at least one phase shifting device is arranged between open-circuited ports of said at least one secondary coil; active coupling structures are arranged between the primary coil and said at least one secondary coil to selectively parallel couple said primary coil and said at least one secondary coil; active coupling structures are arranged between the primary coil and at least two of the said at least one secondary coil, to selectively cross couple the primary coil and said at least two of the said at least one secondary coil; and at least one passive coupling coil is arranged between the primary coil and at least one of the secondary coils, said coupling coil comprising at least one loop winding with two open-circuited ports between which a switch is arranged to selectively close the loop winding of said coupling coil, wherein said coupling coil is not coaxially arranged to said primary and secondary coils but radially displaced, so that the whole coupling coil is lying between adjacent loop windings of two secondary coils and/or between adjacent loop windings of the primary coil and one of the at least one secondary coils, wherein a phase shifting device is arranged between the open-circuited ports of the coupling coil.