Antenna system with full metal back cover

Patent metadata

Field	Value
Publication number	US-10374287-B2
Application number	US-201615283530-A
Country	US
Kind code	B2
Filing date	Oct 3, 2016
Priority date	Oct 26, 2015
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

An antenna system with a full metal back cover is provided in the present disclosure. The antenna system includes a metal back cover with a main body, a first sidewall and a second sidewall opposite to each other, a circuit board with a main ground point, a first antenna module and a second antenna module electrically connected to the circuit board. A first gap is formed between the first sidewall and the main body, and a second gap is formed between the second sidewall and the main body; the metal back cover is divided into a first metal portion including the first sidewall and a second metal portion including the second sidewall. The first metal portion includes a top slit penetrating through an edge of the first sidewall, and the second metal portion includes a bottom slit penetrating through an edge of the second sidewall.

First claim

What is claimed is:

1. An antenna system, comprising:
a metal back cover comprising a main body and a plurality of sidewalls extending from the main body, the plurality of sidewalls comprising a first sidewall and a second sidewall opposite to each other;
a circuit board with a main ground point;
a first antenna module and a second antenna module electrically connected to the circuit board;
wherein a first gap is formed between the first sidewall and the main body, and a second gap is formed between the second sidewall and the main body; By the first gap and the second gap, the metal back cover is divided into a first metal portion including the first sidewall, a second metal portion including the second sidewall, and a third metal portion between the first metal portion and the second metal portion, which are insulated from each other;
wherein the first metal portion comprises a top slit penetrating through an edge of the first sidewall and the first gap, and the second metal portion comprises at least one bottom slit penetrating through an edge of the second sidewall and the second gap;
the second antenna module comprises a diversity antenna unit;
two bottom slits are formed in the second metal portion, the diversity antenna unit comprises a first feed point;
the diversity antenna unit comprises a first ground point, the first feed point and the first ground point of the diversity antenna unit are respectively connected to the second metal portion at locations at two opposite sides of a bottom slit adjacent to the first feed point.

2. The antenna system of claim 1 , wherein the first antenna module and the second antenna module are configured as a main antenna module and a secondary antenna module respectively.

3. The antenna system of claim 1 , wherein the first antenna module comprises a match circuit on the circuit board, a main feed point electrically connected to the first metal portion, and at least one ground point electrically connected to the main ground point on the circuit board.

4. The antenna system of claim 3 , wherein the second antenna module comprises a feed point on the circuit board and electrically connected to the second metal portion, and at least one ground point electrically connected to the main ground point on the circuit board.

5. The antenna system of claim 3 , wherein the metal back cover further comprises a third sidewall and a fourth sidewall opposite to each other; the top slit is located adjacent to the third sidewall or the fourth sidewall, and the main feed point is connected to the first metal portion at a distant location from the top slit.

6. The antenna system of claim 5 , wherein the match circuit comprises a first inductor, a first capacitor connected to the first inductor in parallel, a capacitor switch connected to the first capacitor in series, a second capacitor connected to the first inductor in parallel, a second inductor connected to the first inductor in parallel, and a ground switch between the top slit and the main feed point and for controlling whether the first metal portion is grounded.

7. The antenna system of claim 5 , wherein the first antenna module comprises a single ground point connected to the first metal portion at a more distant location from the top silt than the main feed point.

8. The antenna system of claim 4 , wherein the second antenna module comprises a GPS/WIFI antenna unit.

9. The antenna system of claim 8 , wherein the GPS/WIFI antenna unit comprises a second feed point; the first feed point and the second feed point are arranged between the two bottom slits.

10. The antenna system of claim 9 , wherein a plurality of grounding units electrically connected to the main ground point and between the first feed point and the second feed point.

11. The antenna system of claim 9 , wherein the GPS/WIFI antenna unit comprises a second ground point, the second feed point and the second ground point of the GPS/WIFI antenna unit are respectively connected to the second metal portion at locations at two opposite sides of a bottom slit adjacent to the second feed point.

12. The antenna system of claim 11 , wherein the GPS/WIFI antenna unit further comprises a parasitic antenna between the second feed point and the second ground point of the GPS/WIFI antenna.

13. The antenna system of claim 12 , wherein the parasitic antenna is an L-shaped antenna with an end being grounded.

Assignees

• Wu Jing
• Mai Jianchun
• Wang Chao
• Aac Technologies Pte Ltd

Inventors

• Wu Jing
• Mai Jianchun
• Wang Chao

Classifications

• H01Q21/30

  Combinations of separate antenna units operating in different wavebands and connected to a common feeder system · CPC title

• H01Q9/42

  with folded element, the folded parts being spaced apart a small fraction of the operating wavelength · CPC title

• H01Q1/36

  Structural form of radiating elements, e.g. cone, spiral, umbrella; {Particular materials used therewith}(H01Q1/08, H01Q1/14 take precedence) · CPC title

• H01Q1/38

  formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface  H01Q15/142)} · CPC title

• H01Q1/243 Primary

  with built-in antennas · CPC title