Carbon nano tube Litz wire for low loss inductors and resonators
AssigneeMotorola Mobility LLC
InventorJames P Phillips
Life of this patent
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Abstract
An upper frequency-range circuit (160) includes a load element (168) exhibiting a capacitive load impedance. A first matching network (166) includes at least one nano-scale Litz wire (100) inductor. The first matching network (166) exhibits an inductive impedance that nominally matches the capacitive load impedance. An electrical conductor for providing connections for radio-frequency signals includes a plurality of nano-scale conductors (120) that are arranged in the form of a Litz wire (100). In one method of making a Litz wire (142), a plurality of carbon nanotubes (144) is placed on a substrate (146). The carbon nanotubes (144) are woven according to a predefined scheme so as to form a Litz wire (142). An inductor may be formed by manipulating the Litz wire (100) to form a coil (150).
Claims14
An electrical conductor for providing connections for radio-frequency signals, comprising:
- (a) a first plurality of individual nano scale conductors that have been helically interwoven so as to form a first primary strand;
- (b) a second plurality of individual nano scale conductors that have been helically interwoven so as to form a second primary strand;
- and
- (c) at least a third plurality of individual nano scale conductors that have been helically interwoven so as to form a third primary strand,
- wherein the first primary strand, the second primary strand and the third primary strand are interwoven so as to form a Litz wire.
An inductor comprising:
- (a) a first plurality of individual nano scale conductors that have been interwoven so as to form a first primary strand;
- (b) a second plurality of individual nano scale conductors that have been interwoven so as to form a second primary strand;
- and
- (c) at least a third plurality of individual nano scale conductors that have been interwoven so as to form a third primary strand,
- wherein the first primary strand, the second primary strand and the third primary strand are interwoven so as to form a Litz wire and wherein the Litz wire is formed as a coil.
A method of making a conductor for transmitting radio-frequency signals, comprising the steps of:
- (a) placing a plurality of carbon nanotubes on a substrate;
- and
- (b) interweaving a first plurality of individual nano scale conductors into a first primary strand;
- (c) interweaving a second plurality of individual nano scale conductors into a second primary strand;
- (d) interweaving a third plurality of individual nano scale conductors into a third primary strand;
- and
- (e) interweaving the first primary strand, the second primary strand and the third primary strand so as to form a Litz wire into a Litz wire.
Dependencies are inferred from the claim text.