# US 9,437,925 B2 · Communication device and antenna element therein

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- Number: US 9,437,925 B2
- Document ID: US9437925B2
- Status: Granted
- Kind: B2
- Application number: 14/205,763
- Filed: 2014-03-12
- Published: 2015-06-11
- Granted: 2016-09-06
- Earliest claimed: 2013-12-11
- Assignees: Acer Incorporated
- Applicants: Acer Incorporated
- Inventors: Kin-Lu Wong; Hung-Jen Hsu
- Web page: https://patentgrep.com/patent/US9437925B2

## CPC

- H01Q 5/371: Branching current paths
- H01Q 1/243: {with built-in antennas}
- H01Q 5/321: within a radiating element or between connected radiating elements
- H01Q 5/378: Combination of fed elements with parasitic elements
- H01Q 7/00: Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

A communication device including a ground element and an antenna element is provided. The antenna element is disposed adjacent to an edge of the ground element. The antenna element includes a loop metal element and a branch metal element. The loop metal element has a first end and a second end. The first end is coupled to a signal source. The second end is coupled to the ground element. The loop metal element includes a first segment and a second segment. The first segment is separated from the second segment by a gap. The first segment includes the first end, and the second segment includes the second end. The branch metal element has a third end and a fourth end. The third end is coupled through an inductive element to a connection point on the loop metal element. The fourth end is open.

## Claims

### Claim 1

A communication device, comprising:
a ground element; and
an antenna element, disposed adjacent to an edge of the ground element, wherein the antenna element comprises:
a loop metal element, having a first end and a second end, wherein the first end is coupled to a signal source, the second end is coupled to the ground element, the loop metal element comprises a first segment and a second segment, the first segment is separated from the second segment by a gap, the first segment comprises the first end, and the second segment comprises the second end; and
a branch metal element, having a third end and a fourth end, wherein the third end is coupled through an inductive element to a connection point on the loop metal element, the fourth end is open, and a length of the branch metal element is longer than a length of the first segment;
wherein the gap substantially has a straight-segment shape;
wherein an angle is formed between an extension straight-line of the straight-segment shape and the edge of the ground element, and the angle is not orthogonal;
wherein the angle is from 0 to 45 degrees.

### Claim 2 (depends on 1)

The communication device as claimed in claim 1, wherein the gap substantially has a straight-segment shape.

### Claim 3 (depends on 1)

The communication device as claimed in claim 1, wherein the gap substantially has a step shape.

### Claim 4 (depends on 1)

The communication device as claimed in claim 1, wherein the inductive element is a lumped inductor.

### Claim 5 (depends on 1)

The communication device as claimed in claim 1, wherein the inductive element is a distributed inductor.

### Claim 6 (depends on 1)

The communication device as claimed in claim 1, wherein the antenna element substantially has a planar structure, and the gap of the loop metal element is positioned between the branch metal element and the edge of the ground element.

### Claim 7 (depends on 1)

The communication device as claimed in claim 1, wherein the length of the first segment is at least 0.5 times the length of the second segment.

### Claim 8 (depends on 1)

The communication device as claimed in claim 1, wherein the length of the second segment is at least 0.5 times the length of the first segment.