US5982335A
Expired / Lapsed
US
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Antenna with low reluctance material positioned to influence radiation pattern
Assignee: Motorola Solutions Inc
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Filing: 1997-09-25
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Granted: 1999-11-09
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Expires: 2017-09-25
Abstract
Abstract An antenna (100) has a low reluctance material (140) positioned to influence radiation pattern. The antenna (100) includes a radiator (110), and the low magnetic reluctance material (140) is positioned in close proximity to a particular side of the radiator (110). The low reluctance material (140) has a primary function of providing a preferred path for the magnetic field generated by the radiator (110), thus confining the magnetic energy and reducing radiation along at least one side of the antenna (100).
Inventors
- 👤 Antonio Faraone
- 👤 Quirino Balzano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:44
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/245
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
78 words
An antenna, comprising: a radiator that generates an electromagnetic field; a low magnetic reluctance material positioned in close proximity to the radiator along a particular side of the radiator, and having a primary function of confining the electromagnetic field to reduce radiation generated by the radiator along the particular side of the radiator; a ground plane disposed between the low magnetic reluctance material and the radiator; and a dielectric substrate disposed between the radiator and the ground plane.
Claim 2
Dependent Claim
78 words
An antenna, comprising: a radiator that generates an electromagnetic field; a low magnetic reluctance material positioned in close proximity to the radiator along a particular side of the radiator, and having a primary function of confining the electromagnetic field to reduce radiation generated by the radiator along the particular side of the radiator; a ground plane disposed between the low magnetic reluctance material and the radiator; and a dielectric substrate disposed between the radiator and the ground plane.
Claim 3
Dependent Claim
17 words
The antenna of claim 1, wherein the radiator comprises a planar conductor disposed on the dielectric substrate.
Claim 4
Dependent Claim
15 words
The antenna of claim 1, wherein the low magnetic reluctance material comprises a ferromagnetic material.
Claim 5
Dependent Claim
54 words
A planar antenna, comprising: a ground plane having first and second sides opposite to each other; a radiator disposed along the first side of the ground plane; a dielectric substrate disposed between the radiator and the ground plane; and a low magnetic reluctance material disposed proximate to the ground plane along the second side.
Claim 6
Dependent Claim
54 words
A planar antenna, comprising: a ground plane having first and second sides opposite to each other; a radiator disposed along the first side of the ground plane; a dielectric substrate disposed between the radiator and the ground plane; and a low magnetic reluctance material disposed proximate to the ground plane along the second side.
Claim 7
Dependent Claim
17 words
The antenna of claim 4, wherein the radiator comprises a planar conductor printed on the dielectric substrate.
Claim 8
Dependent Claim
15 words
The antenna of claim 4, wherein the low magnetic reluctance material comprises a ferromagnetic material.
Claim 9
Dependent Claim
117 words
An antenna, comprising: a dielectric substrate having first and second opposing surfaces; a planar radiator disposed along the first surface of the dielectric substrate, the planar radiator being operable to generate a magnetic field; a ground plane disposed along the second surface of the dielectric substrate; a magnetic material disposed along the second surface of the dielectric substrate, such that the ground plane is interposed between the magnetic material and the radiator; wherein: the radiator is operable to generate a radiation pattern and an associated magnetic field; and the magnetic material operates to confine the magnetic field and to influence magnetic field distribution and radiation pattern in an area about the second surface of the dielectric substrate.
Claim 10
Dependent Claim
117 words
An antenna, comprising: a dielectric substrate having first and second opposing surfaces; a planar radiator disposed along the first surface of the dielectric substrate, the planar radiator being operable to generate a magnetic field; a ground plane disposed along the second surface of the dielectric substrate; a magnetic material disposed along the second surface of the dielectric substrate, such that the ground plane is interposed between the magnetic material and the radiator; wherein: the radiator is operable to generate a radiation pattern and an associated magnetic field; and the magnetic material operates to confine the magnetic field and to influence magnetic field distribution and radiation pattern in an area about the second surface of the dielectric substrate.
Claim 11
Dependent Claim
13 words
The antenna of claim 7, wherein the magnetic material comprises a ferromagnetic material.
Claim 12
Dependent Claim
96 words
A communication device, comprising: communication circuitry; an antenna coupled to the communication circuitry, the antenna comprising: a radiator that generates an electromagnetic field having a magnetic field component; a low magnetic reluctance material positioned in close proximity to the radiator along a particular side of the radiator, and having a primary function of confining the electromagnetic field to reduce radiation generated by the radiator along the particular side of the radiator; a ground plane disposed between the low magnetic reluctance material and the radiator; and a dielectric substrate disposed between the radiator and the ground plane.
Claim 13
Dependent Claim
96 words
A communication device, comprising: communication circuitry; an antenna coupled to the communication circuitry, the antenna comprising: a radiator that generates an electromagnetic field having a magnetic field component; a low magnetic reluctance material positioned in close proximity to the radiator along a particular side of the radiator, and having a primary function of confining the electromagnetic field to reduce radiation generated by the radiator along the particular side of the radiator; a ground plane disposed between the low magnetic reluctance material and the radiator; and a dielectric substrate disposed between the radiator and the ground plane.
Claim 14
Dependent Claim
14 words
The communication device of claim 9, wherein the radiator is a planar patch radiator.
Claim 15
Dependent Claim
16 words
The communication device of claim 9, wherein the low magnetic reluctance material comprises a ferromagnetic material.
Claim 16
Dependent Claim
23 words
The communication device of claim 9, further comprising an energy dissipative material disposed between the low magnetic reluctance material and the ground plane.
References Cited (Backward Citations)
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