# US 10,483,642 B2 · Composite right/left-handed transmission line antenna

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- Number: US 10,483,642 B2
- Document ID: US10483642B2
- Status: Granted
- Kind: B2
- Application number: 15/508,348
- Filed: 2014-09-03
- Published: 2017-10-05
- Granted: 2019-11-19
- Earliest claimed: 2014-09-03
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Lei Wang; Meng Hou; Xuefei Zhang; Jianming Li; Hanyang Wang
- Web page: https://patentgrep.com/patent/US10483642B2

## CPC

- H01Q 5/335: at the feed, e.g. for impedance matching
- H01Q 1/243: {with built-in antennas}
- H01Q 9/42: with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
- H01Q 13/08: Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
- H01Q 13/10: Resonant slot antennas
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

A composite right/left-handed transmission line antenna includes a first radiator, a second radiator, and a capacitive matching circuit, where the first radiator is connected to the second radiator, the connected first radiator and second radiator are of a ring shape, and the matching circuit is connected to a feed-in point of the first radiator or the second radiator.

## Claims

### Claim 1

A composite right/left-handed transmission line antenna, comprising:
a first radiator;
a second radiator coupled to the first radiator, wherein the first radiator and second radiator together form a ring shape;
a feed-in point of the first radiator or the second radiator;
a matching circuit coupled to the feed-in point; and
a high-frequency splitter coupled to the first radiator or the second radiator.

### Claim 2 (depends on 1)

The composite right/left-handed transmission line antenna of claim 1, wherein a first end of the first radiator is connected to a second end of the second radiator.

### Claim 3 (depends on 2)

The composite right/left-handed transmission line antenna of claim 2, wherein a third end of the first radiator and a fourth end of the second radiator are configured to be used as ground ends.

### Claim 4 (depends on 1)

The composite right/left-handed transmission line antenna of claim 1, wherein the first radiator and the second radiator are of a same length.

### Claim 5 (depends on 1)

The composite right/left-handed transmission line antenna of claim 1, wherein the matching circuit comprises:
a series combination of a first inductor and a first capacitor; and
a parallel combination of a second inductor and a second capacitor.

### Claim 6 (depends on 1)

The composite right/left-handed transmission line antenna of claim 1, wherein the matching circuit comprises a series combination of an inductor and a capacitor.

### Claim 7 (depends on 1)

The composite right/left-handed transmission line antenna of claim 1, wherein the matching circuit comprises a parallel combination of an inductor and a capacitor.

### Claim 8 (depends on 1)

The composite right/left-handed transmission line antenna of claim 1, wherein the first radiator is a part of a housing of a mobile terminal.

### Claim 9 (depends on 1)

The composite right/left-handed transmission line antenna of claim 1, wherein the second radiator is a part of a housing of a mobile terminal.

### Claim 10 (depends on 1)

The composite right/left-handed transmission line antenna of claim 1, wherein the matching circuit is capacitive.

### Claim 11

A composite right/left-handed transmission line antenna, comprising:
a first radiator;
a second radiator coupled to the first radiator, wherein the first radiator and second radiator together form a ring shape;
a feed-in point of the first radiator; and
a capacitive matching circuit coupled to the feed-in point.

### Claim 12 (depends on 11)

The composite right/left-handed transmission line antenna of claim 11, further comprising a high-frequency splitter coupled to the first radiator or the second radiator.

### Claim 13

A composite right/left-handed transmission line antenna, comprising:
a first radiator having a first end directly coupled to ground;
a second radiator having a second end coupled to a second end of the first radiator, wherein the first radiator and second radiator together form a ring shape, and wherein a first end of the second radiator is directly coupled to the ground;
a feed-in point of the first radiator or the second radiator; and
a matching circuit coupled to the feed-in point.

### Claim 14 (depends on 13)

The composite right/left-handed transmission line antenna of claim 13, further comprising a high-frequency splitter coupled to the first radiator or the second radiator.