Antenna with frequency-selective elements
First Claim
Patent Images
1. An antenna system comprising:
- a substrate; and
an antenna on the substrate, the antenna comprising a first leg element and a second leg element that form at least a portion of an antenna path length;
wherein;
the first leg element comprises a first resonant frequency threshold and a first conductive ink having a first material property, wherein the first resonant frequency threshold is dependent on the first material property and is a threshold above which the first leg element will no longer respond;
the second leg element comprises a second resonant frequency threshold and a second conductive ink having a second material property, wherein the second resonant frequency threshold is dependent on the second material property and is a threshold above which the second leg element will no longer respond; and
the first resonant frequency threshold is different from the second resonant frequency threshold due to a difference between the first material property and the second material property.
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Abstract
Antenna systems have a substrate and antenna on the substrate, where the antenna has a plurality of leg elements. The plurality of leg elements comprises a conductive ink and forms a continuous path. At least one of the plurality of leg elements is individually selectable or de-selectable to change a resonant frequency of the antenna, and leg elements that are selected create an antenna path length corresponding to the resonant frequency. In some embodiments, the antennas are energy harvesters.
34 Citations
21 Claims
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1. An antenna system comprising:
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a substrate; and an antenna on the substrate, the antenna comprising a first leg element and a second leg element that form at least a portion of an antenna path length; wherein; the first leg element comprises a first resonant frequency threshold and a first conductive ink having a first material property, wherein the first resonant frequency threshold is dependent on the first material property and is a threshold above which the first leg element will no longer respond; the second leg element comprises a second resonant frequency threshold and a second conductive ink having a second material property, wherein the second resonant frequency threshold is dependent on the second material property and is a threshold above which the second leg element will no longer respond; and the first resonant frequency threshold is different from the second resonant frequency threshold due to a difference between the first material property and the second material property. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An energy harvesting system comprising:
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A) an antenna system comprising; a substrate; and an antenna on the substrate, the antenna comprising a plurality of leg elements, wherein a leg element in the plurality of leg elements comprises a carbon-based conductive ink and wherein the plurality of leg elements forms a continuous path; wherein at least one leg element in the plurality of leg elements is configured to be passively selected or de-selected to change a resonant frequency of the antenna and create an antenna path length corresponding to the resonant frequency; and B) an energy storage component coupled to the at least one leg element in the plurality of leg elements. - View Dependent Claims (12, 13, 14, 15)
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16. An antenna comprising:
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a first leg element composed of a first carbon-based conductive ink; a second leg element composed of a second carbon-based conductive ink, the second leg element being in electrical contact with the first leg element; and a third leg element composed of a third carbon-based conductive ink, the third leg element being in electrical contact with the second leg element; wherein; the first leg element is configured to be passively selected to resonate below about 5 GHz; a first combination of the first leg element and the second leg element is configured to be passively selected to resonate at frequencies in a first range of frequencies; a second combination of the first leg element and the second leg element and the third leg element is configured to be passively selected to resonate at frequencies in a second range of frequencies; and at least some of the first range of frequencies are higher than at least some of the second range of frequencies. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification