MOBILE DEVICE

• US 20130207855A1
• Filed: 02/14/2012
• Published: 08/15/2013
• Est. Priority Date: 02/14/2012
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: HTC Corporation
• Inventors: CHIEN, Chih-Ling, HUANG, Chien-Hsin, WU, Hsiao-Wei, Shih, Wen-Hsiung
• Granted Patent: US 9,331,391 B2
• Time in Patent Office: Days
• US Class Current: 343/721
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• CPC Class Codes: H01Q 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

A mobile device includes a substrate, a ground element, and a radiation branch. The ground element includes a ground branch, wherein an edge of the ground element has a notch extending into an interior of the ground element so as to form a slot region, and the ground branch partially surrounds the slot region. The radiation branch is substantially inside the slot region, and is coupled to the ground branch of the ground element. The ground branch and the radiation branch form an antenna structure.

Claims

1. A mobile device, comprising:

a substrate;

a ground element, comprising a ground branch, wherein an edge of the ground element has a notch extending into an interior of the ground element to form a slot region, and the ground branch partially surrounds the slot region; and

a radiating branch, disposed inside the slot region, and coupled to the ground branch of the ground element,

wherein the ground branch and the radiating branch form an antenna structure.

2. The mobile device as claimed in claim 1, wherein the ground element is a conductive housing of the mobile device, and the substrate and the radiating branch are disposed in the conductive housing.

3. The mobile device as claimed in claim 1, wherein a length of the slot region is greater than a length of the notch.

4. The mobile device as claimed in claim 1, wherein a length of the notch is smaller than 2 mm.

5. The mobile device as claimed in claim 1, wherein the slot region substantially has a rectangular shape.

6. The mobile device as claimed in claim 1, wherein a length of the radiating branch is greater than a length of the ground branch.

7. The mobile device as claimed in claim 1, wherein the radiating branch substantially has a C-shape.

8. The mobile device as claimed in claim 1, wherein the ground branch of the

9. The mobile device as claimed in claim 1, further comprising:

a power button, closed to the ground branch;

an FPCB (Flexible Printed Circuit Board); and

a signal line, disposed on the FPCB, and coupled between the power button and the substrate, wherein the signal line and the FPCB substantially extend along the ground branch.

10. The mobile device as claimed in claim 1, further comprising:

a transparent nonconductive structure, partially embedded into the notch of the ground element so as to separate the ground element from an open end of the ground branch; and

an LED (Light Emitting Diode), disposed on the substrate, and generating light through the transparent nonconductive structure.

11. The mobile device as claimed in claim 1, further comprising:

a parallel feeding element, wherein a signal source is coupled through the parallel feeding element to the ground branch and to the radiating branch, respectively.

12. The mobile device as claimed in claim 11, wherein the parallel feeding element comprises:

a first connection element, coupled between the signal source and the radiating branch; and

a second connection element, coupled between the signal source and the ground branch.

13. The mobile device as claimed in claim 1, further comprising:

a plastic carrier, supported by the substrate; and

an antenna FPCB (Flexible Printed Circuit Board), disposed on the plastic carrier, wherein the radiating branch is disposed on the antenna FPCB.

14. The mobile device as claimed in claim 1, further comprising:

a plastic carrier, supported by the substrate, wherein the radiating branch is coated on the plastic carrier.

15. The mobile device as claimed in claim 1, wherein the radiating branch is disposed on the substrate.

16. The mobile device as claimed in claim 1, wherein the radiating branch of the antenna structure is excited to form a low frequency band, and the ground branch of the antenna structure is excited to form a high frequency band.

17. The mobile device as claimed in claim 16, wherein the low frequency band is approximately from 880 MHz to 960 MHz.

18. The mobile device as claimed in claim 16, wherein the high frequency band is approximately from 1428 MHz to 2710 MHz.

19. The mobile device as claimed in claim 1, wherein the substrate has a thickness of about 0.8 mm.