Electronic vapor provision system using the heater as an antenna for wireless communications

1. An electronic vapor provision system comprising:

an electrical heater for vaporizing a liquid to form an aerosol for inhalation by a user of the electronic vapor provision system; and

a communications interface for providing wireless communications using one or more communication protocols,

wherein the communications interface is configured to use the heater as an antenna for the wireless communications using the one or more communication protocols, and wherein the communications interface is configured to exchange data between the electronic vapor provision system and one or more external systems using the one or more communication protocols,

wherein the communications interface is provided in a first portion of the electronic vapor provision system, and wherein the heater is provided in a second portion of the electronic vapor provision system, and

wherein the first portion of the electronic vapor provision system has a metallic housing and the second portion of the electronic vapor provision system has a non-metallic housing.

2. The electronic vapor provision system of claim 1 , wherein the communications interface is Bluetooth Low Energy.

3. The electronic vapor provision system of claim 1 , wherein the communications interface is Bluetooth.

4. The electronic vapor provision system of claim 1 , wherein the communications interface is Near Field Communications (NFC).

5. The electronic vapor provision system of claim 1 , wherein the metallic housing of the first portion provides a ground plane for the wireless communications.

6. The electronic vapor provision system of claim 1 , wherein the second portion of the electronic vapor provision system is separable from the first portion of the electronic vapor provision system, and wherein each of the first and second portions of the electronic vapor provision system is provided with a connector to provide mechanical and electrical connectivity between the first and second portions of the electronic vapor provision system.

7. The electronic vapor provision system of claim 1 , wherein the first portion of the electronic vapor provision system includes an electrical power supply and the second portion of the electronic vapor provision system includes a reservoir of liquid to be vaporized by the heater.

8. The electronic vapor provision system of claim 1 , wherein the heater is provided with a power line connection from an electrical power supply, and wherein signals for the wireless communications are superimposed onto the power line connection.

9. The electronic vapor provision system of claim 8 , wherein the wireless interface has a capacitive coupling to the power line connection.

10. The electronic vapor provision system of claim 9 , wherein the wireless interface is coupled to the power line connection by an LC network that provides impedance matching.

11. The electronic vapor provision system of claim 8 , further comprising a controller which operates a switch to control a flow of power from the electrical power supply to the heater, wherein the controller is configured to switch on the flow of power from the electrical power supply to the heater to provide heating in response to a detection that a user has inhaled on the electronic vapor provision system.

12. The electronic vapor provision system of claim 11 , wherein the controller and the communications interface are integrated into a single chip.

13. The electronic vapor provision system of claim 1 , wherein the electronic vapor provision system is configured to prevent wireless communications when the heater is operating to vaporize a liquid to form an aerosol for inhalation by a user of the electronic vapor provision system.

14. The electronic vapor provision system of claim 1 , wherein the heater comprises a substantially planar sheet of metal.

15. The electronic vapor provision system of claim 14 , wherein the heater is formed from a sintered metal fiber material.

16. The electronic vapor provision system of claim 14 , wherein the planar sheet of metal is generally rectangular in shape, with a longest dimension facing towards a mouthpiece of the electronic vapor provision system.

17. The electronic vapor provision system of claim 14 , wherein the heater has a longest dimension which extends at least 10 mm.

18. The electronic vapor provision system of claim 1 , wherein the liquid for forming the aerosol is held in the electronic vapor provision system in one of an absorbing material or a plant derivative material.

19. A control unit for an electronic vapor provision system comprising:

an electrical power supply;

a connector for attaching to a vaporizer or a cartomizer containing an electrical heater, wherein the connector is configured to provide electrical power from the power supply to the heater for vaporizing a liquid to form an aerosol for inhalation by a user of the electronic vapor provision system; and

a communications interface for providing wireless communications to exchange data between the electronic vapor provision system and one or more external systems using one or more communication protocols, wherein the communications interface is configured to use the connector to transmit and receive signals for the wireless communications using the one or more communication protocols by using the heater as an antenna,

wherein the control unit has a metallic housing.