# US 12,119,552 B2 · Lens antenna, detection apparatus, and communication apparatus

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- Number: US 12,119,552 B2
- Document ID: US12119552B2
- Status: Granted
- Kind: B2
- Application number: 17/930,725
- Filed: 2022-09-09
- Published: 2023-01-05
- Granted: 2024-10-15
- Earliest claimed: 2020-03-13
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Shutian Yuan
- Web page: https://patentgrep.com/patent/US12119552B2

## CPC

- H01Q 1/3233: {particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems}
- H01Q 19/062: {for focusing}
- H01Q 3/247: {by switching different parts of a primary active element}
- H01Q 5/42: using two or more imbricated arrays (H01Q5/49 takes precedence)
- H01Q 15/02: Refracting or diffracting devices, e.g. lens, prism
- H01Q 19/06: using refracting or diffracting devices, e.g. lens {(radome H01Q1/42)}
- H01Q 21/065: {Patch antenna array}
- H01Q 21/24: Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction {(circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001)}
- H01Q 25/002: {providing at least two patterns of different beamwidth; Variable beamwidth antennas}
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

This application provides a lens antenna, a detection apparatus, and a communications apparatus. The lens antenna includes a feed source, a radio frequency switch, at least two narrow beam radiation units, and a wide beam radiation unit. The feed source may selectively feed any narrow beam radiation unit or the wide beam radiation unit by using the radio frequency switch. The narrow beam radiation unit or the wide beam radiation unit may be connected to the feed source by switching of the radio frequency switch. A first radiation region of the wide beam radiation unit covers a second radiation region of each narrow beam radiation unit. The wide beam radiation unit includes a plurality of radiation sub-units, and the plurality of radiation sub-units are connected to the radio frequency switch by using a power splitter. In this way, radiation of the plurality of radiation sub-units forms a wide beam.

## Claims

### Claim 1

A lens antenna, comprising:
a feed source, a radio frequency switch;
at least two narrow beam radiation units;
a wide beam radiation unit; and
wherein:
the feed source may selectively feed any narrow beam radiation unit or the wide beam radiation unit by using the radio frequency switch;
the wide beam radiation unit comprises a plurality of radiation sub-units, and the plurality of radiation sub-units are connected to the radio frequency switch by using a power splitter; and
a first radiation region of the wide beam radiation unit covers a second radiation region of each narrow beam radiation unit.

### Claim 2 (depends on 1)

The lens antenna according to claim 1, wherein a sum of regions covered by all the second radiation regions is the same as the region covered by the first radiation region.

### Claim 3 (depends on 1)

The lens antenna according to claim 1, wherein the at least two narrow beam radiation units are disposed around the wide beam radiation units.

### Claim 4 (depends on 3)

The lens antenna according to claim 3, wherein a distance between each of the narrow beam radiation units and any adjacent radiation sub-unit is not less than a wavelength corresponding to an operating frequency band of the lens antenna.

### Claim 5 (depends on 1)

The lens antenna according to claim 1, wherein the plurality of narrow beam radiation units are arranged in two rows; and the plurality of radiation sub-units are arranged in a single row, and are located between the two rows of the narrow beam radiation units.

### Claim 6 (depends on 5)

The lens antenna according to claim 5, wherein:
one diagonal line of any narrow beam radiation unit is parallel to a first direction, and the first direction is an arrangement direction of each row of narrow beam radiation units; and
one diagonal line of each radiation sub-unit is parallel to the first direction.

### Claim 7 (depends on 1)

The lens antenna according to claim 1, wherein at least one of the following is met:
the lens antenna is a dual-polarized antenna; or
each narrow beam radiation unit is a square radiation patch; or
each radiation sub-unit is also a square radiation patch.

### Claim 8 (depends on 7)

The lens antenna according to claim 7, wherein a notch for increasing a beam width is provided on a side of each radiation sub-unit.

### Claim 9 (depends on 8)

The lens antenna according to claim 8, wherein the notch is a triangle.

### Claim 10 (depends on 1)

The lens antenna according to claim 1, further comprising:
a substrate that further comprises a first surface and a second surface; and
wherein:
the narrow beam radiation unit and the wide beam radiation unit are disposed on the first surface; and
the power splitter, the radio frequency switch, and the feed source are disposed on the second surface.

### Claim 11 (depends on 10)

The lens antenna according to claim 10, wherein:
the lens antenna further comprises a stratum; and
the stratum is embedded in the substrate and is located between the first surface and the second surface.

### Claim 12 (depends on 1)

The lens antenna according to claim 1, wherein the power splitter is an equal-power splitter.

### Claim 13 (depends on 1)

The lens antenna according to claim 1, where the power splitter may be a microstrip power splitter, a waveguide power splitter, or a coaxial power splitter.

### Claim 14

A detection apparatus, comprising:
a processor; and
a lens antenna connected to the processor, the lens antenna comprising:
a feed source, a radio frequency switch;
at least two narrow beam radiation units;
a wide beam radiation unit; and
wherein:
the feed source may selectively feed any narrow beam radiation unit or the wide beam radiation unit by using the radio frequency switch;
the wide beam radiation unit comprises a plurality of radiation sub-units, and the plurality of radiation sub-units are connected to the radio frequency switch by using a power splitter; and
a first radiation region of the wide beam radiation unit covers a second radiation region of each narrow beam radiation unit.