# US 2021/0344394 A1 · Wireless communication device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2021/0344394 A1
- Document ID: US20210344394A1
- Status: Published application
- Kind: A1
- Application number: 16/864,239
- Filed: 2020-05-01
- Published: 2021-11-04
- Earliest claimed: 2020-05-01
- Assignees: Fujikura Ltd.
- Applicants: Fujikura Ltd.
- Inventors: Ken Sakuma
- Web page: https://patentgrep.com/patent/US20210344394A1

## CPC

- H04B 7/0617: {for beam forming}
- H01Q 1/523: {between antennas of an array}
- H01Q 3/2605: {Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays}
- H04B 3/52: Systems for transmission between fixed stations via waveguides
- H04B 3/54: Systems for transmission via power distribution lines
- H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
- H04B: TRANSMISSION
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

A wireless communication device includes a beamforming antenna and a beam former that sets a beam pattern of the beamforming antenna depending on an antenna weight vector selected from a beam table. In the beam table, a peak direction of the array factor corresponding to each antenna weight vector is non-uniformly distributed in an angular space.

## Claims

### Claim 1

A wireless communication device comprising:
a beamforming antenna; and
a beam former that sets a beam pattern of the beamforming antenna depending on an antenna weight vector selected from a beam table,
wherein in the beam table, a peak direction of an array factor corresponding to each antenna weight vector is non-uniformly distributed in an angular space.

### Claim 2 (depends on 1)

The wireless communication device according to claim 1, wherein in the peak direction of the array factor corresponding to each antenna weight vector constituting the beam table, a difference between two peak directions adjacent to each other in the angular space varies depending on a difference from a direction orthogonal to a plane in which antenna elements constituting the beamforming antenna are arranged.

### Claim 3 (depends on 2)

The wireless communication device according to claim 2, wherein in a peak direction of an array factor corresponding to each antenna weight vector constituting the beam table, a difference between two peak directions adjacent to each other in the angular space is minimized in a vicinity of a direction orthogonal to the plane.

### Claim 4 (depends on 3)

The wireless communication device according to claim 3, wherein in the peak direction of the array factor corresponding to each antenna weight vector constituting the beam table, a difference between two peak directions adjacent to each other in the angular space gradually increases as being away from a direction orthogonal to the plane.

### Claim 5 (depends on 1)

The wireless communication device according to claim 1, wherein a distribution of a peak direction of the array factor corresponding to each antenna weight vector constituting the beam table is the densest in a vicinity of a direction where a half power beam width of the array factor is minimum.

### Claim 6 (depends on 1)

The wireless communication device according to claim 1, wherein a distribution of a peak direction of the array factor corresponding to each antenna weight vector constituting the beam table is set such that a gain in a valley of the array factor is constant.