Conductive plate used as near field communication antenna and terminal
A terminal includes a printed circuit board, a conductive plate, a near field communication antenna matching circuit and a near field communication chip, where a slot is disposed in the conductive plate, the conductive plate is provided with an opening at an end of the slot, a through-hole is disposed in the conductive plate, the through-hole communicates with the slot, a first electrical contact and a second electrical contact are disposed on two sides of the slot, respectively. The first electrical contact and the second electrical contact are disposed between the end of the slot and the through-hole, at least one of the first electrical contact or the second electrical contact is coupled to the near field communication antenna matching circuit, and a current corresponding to the near field communication frequency is formed at a periphery of the slot and at a periphery of the through-hole.
1. A terminal supporting near field communication, comprising:
a printed circuit board including a near field communication antenna matching circuit and a near field communication chip; and
a conductive plate coupled to the printed circuit board, wherein the conductive plate includes:
a first slot having two sides and an open end;
a through-hole opened to a first side of the first slot; and
a first electrical contact and a second electrical contact being disposed by the two sides of the first slot and disposed between the open end of the first slot and the through-hole, wherein at least one of the first electrical contact or the second electrical contact is coupled to the near field communication antenna matching circuit, and
wherein a current corresponding to a near field communication frequency is formed at a periphery of the first slot and at a periphery of the through-hole.
2. The terminal of claim 1 , wherein the first electrical contact and the second electrical contact are symmetrically disposed on the two sides of the first slot.
3. The terminal of claim 1 , wherein both the first electrical contact and the second electrical contact are adjacent to the end of the first slot.
4. The terminal of claim 1 , wherein the through-hole is configured to place a camera of the terminal or a fingerprint recognition button of the terminal.
5. The terminal of claim 1 , wherein a plurality of through-holes is disposed in the conductive plate, and all the through-holes communicating with the first slot from a same side of the first slot.
6. The terminal of claim 1 , wherein a plurality of through-holes is disposed in the conductive plate, and the through-holes communicating with the first slot from the two sides of the first slot.
7. The terminal of claim 1 , wherein the near field communication antenna matching circuit comprises a first feeding end and a second feeding end, the first feeding end being coupled to the first electrical contact, and the second feeding end being coupled to the second electrical contact.
8. The terminal of claim 7 , wherein a manner of coupling the first feeding end to the first electrical contact comprises that the first feeding end is coupled to a third electrical contact, the third electrical contact being disposed on a metal bar, the third electrical contact and the first electrical contact being disposed on the two sides of the first slot, a non-metal area being disposed between the metal bar and the conductive plate, the metal bar being coupled to the first electrical contact using an electrical coupling line, and the electrical coupling line being across the non-metal area.
9. The terminal of claim 1 , wherein the near field communication antenna matching circuit comprises a feeding end, one of the first electrical contact or the second electrical contact being coupled to the feeding end, and the other of the first electrical contact or the second electrical contact being grounded.
10. The terminal of claim 9 , wherein a manner of coupling one of the first electrical contact or the second electrical contact to the feeding end comprises that the feeding end is coupled to a third electrical contact, the third electrical contact being disposed on a metal bar, the third electrical contact and the first electrical contact being disposed on the two sides of the first slot, a non-metal area being disposed between the metal bar and the conductive plate, the metal bar being coupled to the first electrical contact using an electrical coupling line, and the electrical coupling line being across the non-metal area.
11. The terminal of claim 1 , wherein the first electrical contact comprises at least two adjacent conductive components arranged in parallel.
12. The terminal of claim 1 , wherein the second electrical contact comprises at least two adjacent conductive components arranged in parallel.
13. The terminal of claim 1 , wherein the conductive plate further includes a groove disposed along a line that lies across the conductive, plate wherein the first slot is disposed along the line, wherein a length of the groove corresponds to a length of a portion of the line that is not spanned by the first slot, wherein a depth of at least a portion of the groove is less than a thickness of the conductive plate, and wherein the groove and the first slot is filled with a same insulation material.
14. The terminal of claim 1 , wherein the conductive plate is a rear cover of the terminal.
15. The terminal of claim 1 , wherein the conductive plate is a metal accessory attached on a rear cover of the terminal.
16. The terminal of claim 1 , further comprising an insulation layer, and the insulation layer being located between the conductive plate and the printed circuit board.
17. The terminal of claim 1 , wherein the first slot is in a bent shape.
18. The terminal of claim 1 , wherein the conductive plate further comprises a second slot, and the second slot being in a bent shape.
19. The terminal of claim 1 , wherein the conductive plate is disposed above the printed circuit board.
20. The terminal of claim 1 , wherein the terminal is a mobile phone.