Wireless communication device

1. A wireless communication device, comprising a mainboard and a connecting member, wherein:

the mainboard comprises a mainboard body and a mainboard end part which is connected to the connecting member;

a side of the mainboard body away from the mainboard end part is connected to an antenna;

a matching network is arranged between the mainboard body and the mainboard end part and configured to control distribution of a surface current induced by the antenna on the mainboard;

the mainboard body and the mainboard end part are connected integrally at one side of the mainboard body and connected through the matching network at the other side of the mainboard body so that:

when the wireless communication device is connected to a host device through the connecting member, a first grounding path is formed of the mainboard body and the mainboard end part that are integrally connected, the connecting member and a grounding terminal of the host device, and a second grounding path is formed of the mainboard body, the matching network, the mainboard end part, the connecting member and the grounding terminal of the host device;

wherein in the first and second grounding paths, only the second grounding path is disposed with a matching network.

2. The device according to claim 1 , wherein the connecting member and the mainboard are rotatable relatively through a rotating shaft; the mainboard end part is connected to the connecting member through a metal elastic pin and a connective part; and the metal elastic pin and the connective part further forms a part of the second grounding path.

3. The device according to claim 1 , wherein the connecting member and the mainboard are rotatable relatively through a metal rotating shaft; the mainboard body and the mainboard end part are connected integrally at one side of the mainboard body and connected through the matching network at the other side of the mainboard body; the mainboard end part is connected to the connecting member through a first metal elastic pin, the metal rotating shaft, a second metal elastic pin and a connective part; one end of the first metal elastic pin is connected to the connecting member, and the other end is connected to the metal rotating shaft; and one end of the second metal elastic pin is connected to the metal rotating shaft, and the other end is connected to the matching network.

4. The device according to claim 1 , wherein the connecting member is a straight-plug data connector; the mainboard body and the mainboard end part are connected integrally at one side of the mainboard body and connected through the matching network at the other side of the mainboard body.

5. The device according to claim 2 , wherein the connecting member is a second circuit board.

6. The device according to claim 3 , wherein the connecting member is a second circuit board.

7. The device according to claim 1 , wherein the connecting member is a second circuit board which is capable of sliding relative to the mainboard; the mainboard body and the mainboard end part are connected integrally at one side of the mainboard body and connected through the matching network at the other side of the mainboard body.

8. The device according to claim 1 , wherein the matching network is a low-pass filter circuit which is configured to change distribution of a high-band surface current induced by the antenna on the mainboard.

9. The device according to claim 1 , wherein the matching network is a high-pass low-cut filter circuit which is configured to keep distribution of a low-band surface current induced by the antenna on the mainboard unchanged.

10. The device according to claim 8 , wherein the low-pass filter circuit is formed of an inductor, a capacitor or a combination of any two or three of the inductor, the capacitor and a resistor.

11. The device according to claim 9 , wherein the high-pass low-cut filter circuit is formed of an inductor, a capacitor or a combination of any two or three of the inductor, the capacitor and a resistor.

12. The device according to claim 2 , wherein the connective part is a flexible printed circuit board FPC or a conducting wire.

13. The device according to claim 3 , wherein the connective part is a flexible printed circuit board FPC or a conducting wire.

14. The device according to claim 5 , wherein the connective part is a flexible printed circuit board FPC or a conducting wire.

15. The device according to claim 6 , wherein the connective part is a flexible printed circuit board FPC or a conducting wire.

16. The device according to claim 2 , wherein the matching network is a low-pass filter circuit which is configured to change distribution of a high-band surface current induced by the antenna on the mainboard.

17. The device according to claim 3 , wherein the matching network is a low-pass filter circuit which is configured to change distribution of a high-band surface current induced by the antenna on the mainboard.

18. The device according to claim 2 , wherein the matching network is a high-pass low-cut filter circuit which is configured to keep distribution of a low-band surface current induced by the antenna on the mainboard unchanged.

19. The device according to claim 3 , wherein the matching network is a high-pass low-cut filter circuit which is configured to keep distribution of a low-band surface current induced by the antenna on the mainboard unchanged.

20. The device according to claim 7 , wherein the matching network is a high-pass low-cut filter circuit which is configured to keep distribution of a low-band surface current induced by the antenna on the mainboard unchanged.