Annular ring antenna
First Claim
Patent Images
1. An antenna comprising:
- a substrate; and
an electrically conductive circular ring on said substrate and having an outer diameter and an inner diameter concentrically arranged;
the outer diameter being less than {fraction (1/10)} an operating wavelength so that the antenna is electrically small relative to the wavelength;
the inner diameter being in a range of π
/6 to π
/2 times the outer diameter.
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Abstract
The antenna includes a substrate, such as a dielectric material, and an electrically conductive circular ring on the substrate and having an outer diameter and an inner diameter concentrically arranged. The outer diameter is less than {fraction (1/10)} an operating wavelength, and preferably about {fraction (1/20)}th, so that the antenna is electrically small relative to the wavelength. The inner diameter is in a range of π/6 to π/2 times the outer diameter, and preferably is π/4 times the outer diameter to enhance the gain relative to its area.
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Citations
39 Claims
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1. An antenna comprising:
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a substrate; and
an electrically conductive circular ring on said substrate and having an outer diameter and an inner diameter concentrically arranged;
the outer diameter being less than {fraction (1/10)} an operating wavelength so that the antenna is electrically small relative to the wavelength;
the inner diameter being in a range of π
/6 to π
/2 times the outer diameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An antenna comprising:
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a substrate; and
an electrically conductive circular ring on said substrate and having an outer diameter and an inner diameter concentrically arranged, said electrically conductive circular ring having at least one gap therein;
the outer diameter being less than {fraction (1/10)} an operating wavelength so that the antenna is electrically small relative to the wavelength;
the inner diameter being π
/4 times the outer diameter. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of making an antenna comprising:
forming an electrically conductive circular ring on a substrate including forming an outer diameter of the electrically conductive circular ring to be less than {fraction (1/10)} an operating wavelength so that the antenna is electrically small relative to the wavelength, and forming an inner diameter of the electrically conductive circular ring to be in a range of π
/6 to π
/2 times the outer diameter.- View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
Specification