# US 12,113,290 B2 · Crossed-dipole antenna

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

- Number: US 12,113,290 B2
- Document ID: US12113290B2
- Status: Granted
- Kind: B2
- Application number: 18/014,985
- Filed: 2022-08-29
- Published: 2024-07-18
- Granted: 2024-10-08
- Earliest claimed: 2021-10-15
- Assignees: Maruwa Co., Ltd.
- Applicants: Maruwa Co., Ltd.
- Inventors: Sota Nagashima; Makoto Yamaguchi
- Web page: https://patentgrep.com/patent/US12113290B2

## CPC

- 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 21/26: Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
- H01Q 5/371: Branching current paths
- H01Q 9/16: with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole (H01Q9/44 takes precedence)
- H01Q 19/108: {Combination of a dipole with a plane reflecting surface (H01Q19/106 takes precedence; strip line H01Q9/065)}
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

Provided is a crossed-dipole antenna that can communicate at a plurality of frequencies, and has a simple structure that can be miniaturized. The crossed-dipole antenna is provided with a core composed of a dielectric material, a reflecting plate, a first element group composed of four first elements that are formed on an outer surface of the core, extend from a central portion of the top surface of the core with a first length L1, and are arranged to be orthogonal to one another, a second element group that resonates at a second resonance frequency f2 and is composed of four second elements that are formed on the outer surface of the core, extend from the central portion of the top surface of the core with a second length L2, and are arranged to be orthogonal to one another, and feeders that transmit electric power to each element. Each of the first elements and the second elements extends along the outer surface of the core and is bent from the top surface to the side surface. The first length L1 of the first elements is less than a fourth of a first wavelength λ1 corresponding to the first resonance frequency f1, and the second length L2 of the second elements is less than a fourth of a second wavelength λ2 corresponding to the second resonance frequency f2.

## Claims

### Claim 1

A crossed-dipole antenna comprising:
a core of a columnar shape having a top surface, a side surface, and a bottom portion, the core being composed of a dielectric material;
a reflecting plate arranged at the bottom portion of the core;
a first element group that resonates at a first resonance frequency f1 and is composed of four first elements that are formed on an outer surface of the core, extend from a central portion of the top surface of the core with a first length L1 and a first width W1, and are arranged to be orthogonal to one another;
a second element group that resonates at a second resonance frequency f2 and is composed of four second elements that are formed on the outer surface of the core, extend from the central portion of the top surface of the core with a second length L2 and a second width W2, and are arranged to be orthogonal to one another and so as not to overlap with the first elements; and
feeders that transmit electric power to each element in the first and second element groups,
wherein each of the first elements and the second elements extends along the outer surface of the core and is bent from the top surface to the side surface, the first length L1 is less than a fourth of a first wavelength 21 corresponding to the first resonance frequency f1, and the second length L2 is less than a fourth of a second wavelength 22 corresponding to the second resonance frequency f2.

### Claim 2 (depends on 1)

The crossed-dipole antenna according to claim 1, wherein each of the first elements is electrically connected to one adjacent second element at an end portion on the central portion side.

### Claim 3 (depends on 1)

The crossed-dipole antenna according to claim 1, wherein the dielectric material has a permittivity of 2 to 78.

### Claim 4 (depends on 1)

The crossed-dipole antenna according to claim 1, wherein the first length L1 is less than one eighth of the first wavelength λ, and the second length L2 is less than one eighth of the second wavelength λ2.

### Claim 5 (depends on 1)

The crossed-dipole antenna according to claim 1, wherein a distance between the top surface of the core and the reflecting plate is less than a fourth of the first wavelength λ1 and less than a fourth of the second wavelength λ2.

### Claim 6 (depends on 1)

The crossed-dipole antenna according to claim 1, further comprising a third element group that resonates at a third resonance frequency and is composed of four third elements that are formed on the outer surface of the core, extend from the central portion of the top surface of the core with a third length L3 and a second width W3, and are arranged to be orthogonal to one another and so as not to overlap with the first elements and the second elements.