Mobile Communication Device

• US 20110156958A1
• Filed: 04/16/2010
• Published: 06/30/2011
• Est. Priority Date: 12/31/2009
• Status: Active Grant

• Current Assignee: Acer, Inc.
• Original Assignee: Acer, Inc.
• Inventors: Wong, Kin-Lu, Chen, Shu-Chuan
• Granted Patent: US 8,482,464 B2
• Time in Patent Office: Days
• US Class Current: 343/700.MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 5/371 Branching current paths
• CPC Class Codes: H01Q 5/378 Combination of fed elements with parasitic elements
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

The present invention relates to a mobile communication device comprising a ground plane, a dielectric substrate, and an antenna. The antenna is disposed on one surface of the dielectric substrate and comprises a radiating portion, a feeding portion, and a shorting portion. The radiating portion comprises a first radiating portion and a second radiating portion. The first radiating portion has at least one bending. One end of the first radiating portion is left open. The second radiating portion is a shunt metal strip. Both ends of the second radiating portion are electrically connected to the first radiating portion such that the second radiating portion forms a closed loop with a segment of the first radiating portion. The feeding portion couples the electromagnetic energy to the radiating portion through a coupling gap, and one end of the feeding portion is the antenna'"'"'s feeding point. One end of the shorting portion is electrically connected to the radiating portion, and the other end of the shorting portion is electrically connected to the ground plane.

Claims

1. A mobile communication device comprising:

a ground plane;

a dielectric substrate; and

an antenna, the antenna having a first operating band and a second operating band, the antenna being disposed on the dielectric substrate and comprising;

a radiating portion comprising;

a first radiating portion having at least one bending with both ends left open; and

a second radiating portion comprising a shunt metal with both ends electrically connected to the first radiating portion respectively such that the second radiating portion forms a closed loop with a segment of the first radiating portion, the second radiating portion having a length substantially equal to half of a length of the closed loop, wherein the closed loop has a total length at least equal to one tenth of a wavelength of a center frequency of the first operating band of the antenna;

a feeding portion coupling the electromagnetic energy to the radiating portion through a coupling gap, one end of the feeding portion being the antenna'"'"'s feeding point; and

a shorting portion having one end electrically connected to the radiating portion and the other end electrically connected to the ground plane.

2. The mobile communication device as claimed in claim 1, wherein the first operating band covers the frequency band of 698˜

960 MHz, and the second operating band covers the frequency band of 1710˜

2690 MHz.

3. The mobile communication device as claimed in claim 1, wherein the ground plane is a system ground plane of a mobile phone.

4. The mobile communication device as claimed in claim 1, wherein the coupling gap is less than 1 mm.

5. The mobile communication device as claimed in claim 1, wherein the radiating portion, the feeding portion, and the shorting portion are on the same surface of the dielectric substrate.

6. The mobile communication device as claimed in claim 1, wherein the dielectric substrate is a system circuit board of a mobile communication system.

7. The mobile communication device as claimed in claim 1, wherein the closed loop is in a rectangular shape or a portion of the closed loop is in an arc shape.

8. The mobile communication device as claimed in claim 1, wherein the first radiating portion comprises two bendings formed in a U shape, and the second radiating portion is in an L shape.

9. The mobile communication device as claimed in claim 1, wherein the ground plane is on a surface of the dielectric substrate.

10. The mobile communication device as claimed in claim 1, wherein the radiating portion, the feeding portion, and the shorting portion do not overlap with the ground plane.