# US 10,310,491 B2 · Radiating element and engineered magnetic material

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- Number: US 10,310,491 B2
- Document ID: US10310491B2
- Status: Granted
- Kind: B2
- Application number: 14/150,165
- Filed: 2014-01-08
- Published: 2015-07-09
- Granted: 2019-06-04
- Earliest claimed: 2014-01-07
- Assignees: The United States of America as represented by the Secretary of the Army
- Applicants: The United States of America, as represented by the Secretary of the Army
- Inventors: Glenn Minko; Johnny Lee Daniel; Katherine Duncan; James Breakall; Mahmoud Khalil; Mohamed Khalil
- Web page: https://patentgrep.com/patent/US10310491B2

## CPC

- G05B 19/41865: {characterised by job scheduling, process planning, material flow}
- H01Q 15/004: {using superconducting materials or magnetised substrates}
- G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G)
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)

## Abstract

Various embodiments are described that relate to a radiating element and an engineered magnetic material. In a communication environment a radiating element can be used to communicate information, such as to send signals. Various factors, including electromagnetic factors, can influence the performance of the radiating element. In one example, if the radiating element becomes too close to a ground plane, then performance of the radiating element can suffer. To counter negative effects of being too close to the ground plane an engineered magnetic material can be employed that causes the radiating element to perform better when relatively close to the ground plane.

## Claims

### Claim 1

A system, comprising:
a radiating element configured to operate within a frequency band with a high frequency and a low frequency; and
an engineered magnetic material with a thickness within a thickness range of a maximum thickness and a minimum thickness,
where the minimum thickness is equal to about 0.01 of a wavelength that corresponds to the low frequency for the frequency band,
where the maximum thickness is equal to about 0.2 of a wavelength that corresponds to the high frequency for the frequency band,
where the thickness of the engineered magnetic material is of a non-uniform thickness.

### Claim 2 (depends on 1)

The system of claim 1,
where the engineered magnetic material is configured to be coupled to a ground plane,
where the engineered magnetic material is physically between the ground plane and the radiating element, and
where the engineered magnetic material causes the radiating element to radiate in a direction substantially away from the ground plane.

### Claim 3 (depends on 1)

The system of claim 1, where the radiating element is a dipole radiating element.

### Claim 4 (depends on 1)

The system of claim 1, where the engineered magnetic material is an isotropic Ferrite material.

### Claim 5 (depends on 1)

The system of claim 1,
where the thickness of the engineered magnetic material is of an about uniform thickness.

### Claim 6 (depends on 1)

The system of claim 1,
where the high frequency is a highest frequency of the frequency band and
where the low frequency is a lowest frequency of the frequency band.

### Claim 7

A system, comprising:
a radiating element configured to radiate a signal with a power; and
an isotropic Ferrite material,
where the radiating element comprises a first portion and a second portion that is opposite the first portion,
where the Ferrite material is positioned to face the first portion and not the second portion, and
where the Ferrite material mitigates propagation of the signal in a direction away from a first portion.

### Claim 8 (depends on 7)

The system of claim 7, where:
the radiating element has two longer sides opposite one another and two shorter sides opposite one another,
the first portion is along one of the two longer sides, and
the second portion is along one of the two longer sides.

### Claim 9 (depends on 8)

The system of claim 8, where:
the radiating element is parallel to the isotropic Ferrite material and
a gain pattern of an emission of the radiating element is substantially hemispherical due to the isotropic Ferrite material.

### Claim 10 (depends on 7)

The system of claim 7,
where the radiating element is configured to operate in a frequency band,
where the frequency band comprises an upper frequency limit associated with a lower wavelength and a lower frequency limit associated with an upper wavelength,
where the isotropic Ferrite material has a thickness,
where the thickness is greater than or equal to about 1% of the upper wavelength, and
where the thickness is no greater than or equal to about 20% of the lower wavelength.

### Claim 11 (depends on 10)

The system of claim 10,
where the isotropic Ferrite material has a relative magnetic permeability,
where the isotropic Ferrite material has a relative electric permittivity, and
where the relative magnetic permeability is about equal to the relative electric permittivity.

### Claim 12 (depends on 10)

The system of claim 10,
where the isotropic Ferrite material has a relative magnetic permeability,
where the isotropic Ferrite material has a relative electric permittivity, and
where the relative magnetic permeability is about less than the relative electric permittivity.

### Claim 13 (depends on 7)

The system of claim 7,
where the thickness of the engineered magnetic material is of a non-uniform thickness,
where the thickness is within the maximum thickness and the minimum thickness,
where the minimum thickness is equal to about 1% of a wavelength that corresponds to the lowest frequency for the frequency band, and
where the maximum thickness is equal to about 20% of a wavelength that corresponds to the highest frequency for the frequency band.

### Claim 14

A system, comprising:
a radiating element configured to radiate a signal; and
an engineered magnetic material positioned on one side of the radiating element such that the signal contacts the engineered magnetic material,
where the engineered magnetic material has a relative magnetic permeability,
where the engineered magnetic material has a relative electric permittivity,
where the relative magnetic permeability is about equal to or less than the relative electric permittivity,
where the radiating element is a dipole radiating element, and
where the engineered magnetic material is an isotropic Ferrite material.

### Claim 15 (depends on 14)

The system of claim 14,
where the relative magnetic permeability is greater than a value of about 5.

### Claim 16 (depends on 14)

The system of claim 14, where:
the radiating element is parallel to the engineered magnetic material and
a gain pattern of the signal is substantially hemispherical and directional.

### Claim 17 (depends on 14)

The system of claim 14,
where the relative magnetic permeability is about equal to the relative electric permittivity.

### Claim 18 (depends on 14)

The system of claim 14,
where the relative magnetic permeability is less than the relative electric permittivity.

### Claim 19 (depends on 14)

The system of claim 14,
where the radiating element comprises a first portion and a second portion that is opposite the first portion,
where the isotropic Ferrite material is positioned to face the first portion and not the second portion,
where the isotropic Ferrite material mitigates propagation of the signal in a direction away from a first portion,
where the radiating element has two longer sides opposite one another and two shorter sides opposite one another,
where the first portion is along one of the two longer sides, and
where the second portion is along one of the two longer sides.