Antenna, antenna device, and wireless device
First Claim
1. An antenna, comprising:
- a feeding element connected to a feeding point;
a first radiating element spaced apart from the feeding element by a distance set such that the first radiating element is coupled to the feeding element through electromagnetic field coupling and establishes noncontact feeding via the feeding element;
a second radiating element spaced apart from the feeding element by a distance set such that the second radiating element is coupled to the feeding element through electromagnetic field coupling and establishes noncontact feeding via the feeding element;
a first control element connected to the feeding element via a first impedance variable unit and positioned such that when the first impedance variable unit decreases an impedance at a resonant frequency of the first radiating element, the electromagnetic field coupling between the feeding element and the first radiating element is weakened and a radiating conductor function of the first radiating element is degraded; and
a second control element connected to the feeding element via a second impedance variable unit and positioned such that when the second impedance variable unit decreases an impedance at a resonant frequency of the second radiating element, the electromagnetic field coupling between the feeding element and the second radiating element is weakened and a radiating conductor function of the second radiating element is degraded,wherein the first impedance variable unit comprises circuitry configured to adjust connection between the feeding element and the first control element, the second impedance variable unit comprises circuitry configured to adjust connection between the feeding element and the second control element, in a dipole mode, a feeding portion of each of the first radiating element and the second radiating element at which the feeding element feeds the first radiating element or the second radiating element is located at a first region spaced apart from a lowest impedance portion of the first radiating element or the second radiating element by a distance greater than or equal to ⅛
of a total length of the first radiating element or the second radiating element;
in a monopole mode, the feeding portion is located at a second region spaced apart from the lowest impedance portion of the first radiating element or the second radiating element by a distance greater than or equal to ¼
of the total length of the first radiating element or the second radiating element; and
in a loop mode, the feeding portion is located at a third region spaced apart from a highest impedance portion of the first radiating element or the second radiating element by a distance less than or equal to 3/16 of an inner circumference of a loop formed by the first radiating element or the second radiating element.
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Accused Products
Abstract
An antenna includes a feeding element connected to a feeding point, a first radiating element that is spaced apart from the feeding element and is coupled to the feeding element through electromagnetic field coupling, a second radiating element that is spaced apart from the feeding element and is coupled to the feeding element through electromagnetic field coupling, a first control element that is connected to the feeding element via a first impedance variable unit, and a second control element that is connected to the feeding element via a second impedance variable unit, and a control unit that controls the first impedance variable unit to adjust the connection between the feeding element and the first control element and controls the second impedance variable unit to adjust the connection between the feeding element and the second control element.
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Citations
20 Claims
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1. An antenna, comprising:
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a feeding element connected to a feeding point; a first radiating element spaced apart from the feeding element by a distance set such that the first radiating element is coupled to the feeding element through electromagnetic field coupling and establishes noncontact feeding via the feeding element; a second radiating element spaced apart from the feeding element by a distance set such that the second radiating element is coupled to the feeding element through electromagnetic field coupling and establishes noncontact feeding via the feeding element; a first control element connected to the feeding element via a first impedance variable unit and positioned such that when the first impedance variable unit decreases an impedance at a resonant frequency of the first radiating element, the electromagnetic field coupling between the feeding element and the first radiating element is weakened and a radiating conductor function of the first radiating element is degraded; and a second control element connected to the feeding element via a second impedance variable unit and positioned such that when the second impedance variable unit decreases an impedance at a resonant frequency of the second radiating element, the electromagnetic field coupling between the feeding element and the second radiating element is weakened and a radiating conductor function of the second radiating element is degraded, wherein the first impedance variable unit comprises circuitry configured to adjust connection between the feeding element and the first control element, the second impedance variable unit comprises circuitry configured to adjust connection between the feeding element and the second control element, in a dipole mode, a feeding portion of each of the first radiating element and the second radiating element at which the feeding element feeds the first radiating element or the second radiating element is located at a first region spaced apart from a lowest impedance portion of the first radiating element or the second radiating element by a distance greater than or equal to ⅛
of a total length of the first radiating element or the second radiating element;
in a monopole mode, the feeding portion is located at a second region spaced apart from the lowest impedance portion of the first radiating element or the second radiating element by a distance greater than or equal to ¼
of the total length of the first radiating element or the second radiating element; and
in a loop mode, the feeding portion is located at a third region spaced apart from a highest impedance portion of the first radiating element or the second radiating element by a distance less than or equal to 3/16 of an inner circumference of a loop formed by the first radiating element or the second radiating element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An antenna, comprising:
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a feeding element connected to a feeding point; a first radiating element spaced apart from the feeding element by a distance set such that the first radiating element is coupled to the feeding element through electromagnetic field coupling and establishes noncontact feeding via the feeding element; a second radiating element spaced apart from the feeding element by a distance set such that the second radiating element is coupled to the feeding element through electromagnetic field coupling and establishes noncontact feeding via the feeding element; a first control element connected to the feeding element via a first impedance variable unit and having a high impedance portion having a high impedance at a resonant frequency of the first radiating element; and a second control element connected to the feeding element via a second impedance variable unit and having a high impedance portion having a high impedance at a resonant frequency of the second radiating element, wherein the first impedance variable unit comprises circuitry configured to adjust connection between the feeding element and the first control element, the second impedance variable unit comprises circuitry configured to adjust connection between the feeding element and the second control element, the first control element is positioned such that the high impedance portion of the first control element is positioned closer to a low impedance portion of the first radiating element having a low impedance at the resonant frequency of the first radiating element than a high impedance portion of the first radiating element having a high impedance at the resonant frequency of the first radiating element, and the second control element is positioned such that the high impedance portion of the second control element is positioned closer to a low impedance portion of the second radiating element having a low impedance at the resonant frequency of the second radiating element than a high impedance portion of the second radiating element having a high impedance at the resonant frequency of the second radiating element. - View Dependent Claims (15, 16, 17)
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18. An antenna, comprising:
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a ground plane; a plate conductor including a conductor portion spaced apart from the ground plane and facing the ground plane; a feeding element connected to a feeding point; a first radiating element spaced apart from the feeding element by a distance set such that the first radiating element is coupled to the feeding element through electromagnetic field coupling and establishes noncontact feeding via the feeding element; a second radiating element spaced apart from the feeding element by a distance set such that the second radiating element is coupled to the feeding element through electromagnetic field coupling and establishes noncontact feeding via the feeding element; a first control element connected to the feeding element via a first impedance variable unit and positioned such that when the first impedance variable unit decreases an impedance at a resonant frequency of the first radiating element, the electromagnetic field coupling between the feeding element and the first radiating element is weakened and a radiating conductor function of the first radiating element is degraded; and a second control element connected to the feeding element via a second impedance variable unit and positioned such that when the second impedance variable unit decreases an impedance at a resonant frequency of the second radiating element, the electromagnetic field coupling between the feeding element and the second radiating element is weakened and a radiating conductor function of the second radiating element is degraded, wherein the feeding element extends in a direction away from the ground plane, each of the first radiating element and the second radiating element includes a portion positioned along an edge of the ground plane, the first radiating element and the second radiating element are connected to the plate conductor, the ground plane and the plate conductor are DC coupled, the first impedance variable unit comprises circuitry configured to adjust connection between the feeding element and the first control element, and the second impedance variable unit comprises circuitry configured to adjust connection between the feeding element and the second control element. - View Dependent Claims (19, 20)
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Specification