Differential mode capacitively loaded magnetic dipole antenna
First Claim
Patent Images
1. A device, comprising:
- an antenna configured for coupling to an article, the antenna defined by a plurality of portions, wherein one or more of the plurality of portions are radiative portion coupled in a first geometric relationship that effectuates one or more antenna frequency, and wherein one or more of the plurality of portions are impedance matching portion coupled in a second geometrical relationship that effectuates one or more antenna impedance, wherein a change in the first geometrical relationship effectuates a change in the one or more antenna frequency, wherein a change in the second geometrical relationship effectuates a change in the one or more antenna impedance the impedance the matching portion arranged in the second geometrical relationship to produce an antenna impedance to match an impedance of the article, and wherein a change of the one or more antenna frequency or the one or more antenna impedance is effectuated without a corresponding change in the one or more antenna impedance or the one or more antenna frequency.
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Abstract
Differential mode capacitively loaded magnetic dipole designs are provided for usage in various applications. Impedance matching may be accomplished with changes to antenna structures without concomitant changes in resonant frequency.
84 Citations
23 Claims
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1. A device, comprising:
an antenna configured for coupling to an article, the antenna defined by a plurality of portions, wherein one or more of the plurality of portions are radiative portion coupled in a first geometric relationship that effectuates one or more antenna frequency, and wherein one or more of the plurality of portions are impedance matching portion coupled in a second geometrical relationship that effectuates one or more antenna impedance, wherein a change in the first geometrical relationship effectuates a change in the one or more antenna frequency, wherein a change in the second geometrical relationship effectuates a change in the one or more antenna impedance the impedance the matching portion arranged in the second geometrical relationship to produce an antenna impedance to match an impedance of the article, and wherein a change of the one or more antenna frequency or the one or more antenna impedance is effectuated without a corresponding change in the one or more antenna impedance or the one or more antenna frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of using an antenna with an article, comprising the steps of:
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coupling the antenna to the article;
providing the antenna with one or more impedance matching portion to match an impedance of the antenna to an impedance of the article;
placing the article in a radiative field;
using the radiative field to excite the antenna to radiate a signal at a resonant frequency; and
detecting the signal. - View Dependent Claims (10, 11, 12, 13)
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14. A system comprising:
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an article having an article impedance;
an antenna coupled to the article, the antenna having an antenna impedance;
the antenna including one or more impedance matching portion arranged to match the antenna impedance to the article impedance and one or more radiative portion;
wherein when the article is placed in a radiative field, the radiative field excites the one or more radiative portion of the antenna to radiate a signal at a resonant frequency. - View Dependent Claims (15, 16, 17, 18)
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19. An antenna for coupling to an article, the antenna having an antenna impedance and the article having an article impedance, the antenna comprising:
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one or more impedance matching portion arranged to match the antenna impedance to the article impedance;
one or more radiative portion;
wherein when the article if placed in a radiative field, the one or more radiative portion are excited to radiate at a resonant frequency. - View Dependent Claims (20, 21, 22, 23)
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Specification