Device having a multimode antenna with at least one conductive wire with a plurality of turns
A method of providing a single structure multiple mode antenna is described. The antenna is preferably constructed having a first inductor coil that is electrically connected in series with a second inductor coil. The antenna is constructed having a plurality of electrical connections positioned along the first and second inductor coils. A plurality of terminals is connected to the electrical connections that facilitate numerous electrical connections and enables the antenna to be selectively tuned to various frequencies and frequency bands.
1. A device comprising:
a first coil having at least one conductive wire with a plurality of turns; and
a second coil electrically connected in series with the first coil, the second coil comprising a plurality of conductive wires, each wire of the plurality of conductive wires having at least 10 turns,
wherein the second coil includes an insulator separating at least two conductive wires of the plurality of conductive wires,
wherein the second coil includes at least one connector connecting two or more conductive wires of the plurality of conductive wires.
2. The device of claim 1 , wherein the second coil operates at a frequency selected from a frequency range between 100 kHz and 350 kHz.
3. The device of claim 1 , wherein a width of a portion of a wire of the plurality of conductive wires is between 0.5 mm and 1.5 mm.
4. The device of claim 1 , further comprising a gap disposed between at least two of a plurality of turns in at least one wire of the plurality of conductive wires, wherein the gap is between 0.1 mm and 0.5 mm.
5. The device of claim 1 , further comprising a gap disposed between at least two of a plurality of turns in at least one wire of the plurality of conductive wires, wherein the gap is between 0.05 mm and 0.3 mm.
6. The device of claim 1 , further comprising a gap disposed between one of the plurality of turns in the at least one conductive wire and at least one turn in at least one wire of the plurality of conductive wires, wherein the gap is between 0.05 mm and 10 mm.
7. The device of claim 1 , wherein at least one wire of the plurality of conductive wires comprises:
a first turn having a portion of the first turn including a first width; and
a second turn having a portion of the second turn including a second width, wherein the second width is different than the first width.
8. The device of claim 7 , wherein the first turn is disposed adjacent to the second turn.
9. The device of claim 7 , wherein the first turn is an outer turn and the second turn is an inner turn and the width of the first turn is greater than the width of the second turn.
10. The device of claim 7 , wherein the first turn has a width between 0.5 mm and 1.5 mm and the second turn has a width between 0.2 mm and 1.0 mm.
11. The device of claim 1 , wherein the first coil is positioned adjacent to the second coil.
12. The device of claim 1 , wherein the first coil has a first coil first end and a first coil second end and the second coil has a second coil first end and a second coil second end, further wherein a first terminal is electrically connected to the first coil first end, a second terminal is electrically connected to the second coil second end, and a third terminal is electrically connected to one of the first coil and the second coil.
13. The device of claim 12 , further comprising a selection circuit connected to at least one of the first terminal, the second terminal, and the third terminal.
14. The device of claim 1 , further including a shielding material disposed adjacent to one of the first coil, the second coil, or both the first coil and the second coil, wherein the shielding material is a ferrite material.
15. The device of claim 14 , wherein the combination of the second coil and shielding material provide a quality factor greater than 10.
16. The device of claim 1 , wherein an inductance of the second coil is greater than 4.2 μH and the second coil operates at a frequency selected from a frequency range between 100 kHz and 350 kHz.
17. The device of claim 1 , wherein the first coil and the second coil are disposed on one or more flexible substrates.
18. The device of claim 17 , wherein the one or more flexible substrates further comprises a substrate material from a group consisting of a polyimide, an acrylic, fiberglass, polyester, polyether imide, polytetrafluoroethylene, polyethylene, polyetheretherketone (PEEK), polyethylene napthalate, fluoropolymers, copolymers, a ceramic material, a ferrite material, and combinations thereof.
19. The device of claim 1 , wherein the device is a mobile device.
20. The device of claim 1 , further comprising a selection circuit connected to at least one of a first terminal, a second terminal, or a third terminal.
21. The device of claim 1 , wherein each conductive wire of the first coil and the second coil comprises an electrically conductive material from a group consisting of a trace, a filar, a filament, and combinations thereof.