Cavity-backed slot antenna with an active artificial magnetic conductor
First Claim
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1. A cavity-backed slot antenna having a cavity therein, the cavity-backed slot antenna comprising an artificial magnetic conductor (AMC) disposed in said cavity-backed slot antenna, the AMC being formed by an array of metal patches displaced by a distance above a bottom of said cavity, the metal patches have edges confronting sidewalls of the cavity, said edges being electrically connected to said sidewalls, the AMC being loaded with active reactive elements.
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Abstract
A cavity-backed slot antenna whose cavity has an artificial magnetic conductor (AMC) disposed therein, the AMC being loaded with active reactive elements. The active reactive elements are preferably formed by Non-Foster Circuits (NFCs).
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Citations
17 Claims
- 1. A cavity-backed slot antenna having a cavity therein, the cavity-backed slot antenna comprising an artificial magnetic conductor (AMC) disposed in said cavity-backed slot antenna, the AMC being formed by an array of metal patches displaced by a distance above a bottom of said cavity, the metal patches have edges confronting sidewalls of the cavity, said edges being electrically connected to said sidewalls, the AMC being loaded with active reactive elements.
- 11. A cavity-backed slot antenna whose cavity has an artificial magnetic conductor (AMC) disposed therein, the AMC comprising an array of metal patches displaced by a set distance above a bottom of said cavity, the metal patches being arrayed in two columns running along a length of the cavity, and with a gap between the columns, the metal patches having edges confronting sidewalls of the cavity, said edges being electrically connected to said sidewalls, each gap between neighboring patches being bridged by reactive elements.
- 13. A cavity-backed slot antenna having a cavity therein, the cavity-backed slot antenna comprising an artificial magnetic conductor (AMC) disposed in said cavity-backed slot antenna, the AMC comprising an array of metal patches displaced by a set distance above a bottom of said cavity, the metal patches being arrayed in a single column running along a length of the cavity, and with a gap between the column and sidewalls of the cavity, the metal patches having edges confronting sidewalls of the cavity, said edges being electrically coupled to said sidewalls via reactive elements.
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15. A method of lowering a resonant frequency of a cavity backed slot antenna comprising the steps of:
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(i) disposing an array of electrically conductive patches in a cavity of said cavity backed slot antenna adjacent a slot of said cavity backed slot antenna, the array of electrically conductive patches forming an artificial magnetic conductor; (ii) coupling capacitive elements between said plurality of electrically conductive patches and an electrically conductive wall defining at least two edges of said cavity.
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16. A method of increasing the bandwidth around a resonant frequency of a cavity backed slot antenna comprising the steps of:
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(i) disposing an array of electrically conductive patches in a cavity of said cavity backed slot antenna adjacent a slot of said cavity backed slot antenna, the array of electrically conductive patches forming an artificial magnetic conductor; (ii) coupling capacitive elements between said plurality of electrically conductive patches and an electrically conductive wall defining at least two edges of said cavity, said capacitive elements each having a negative capacitance. - View Dependent Claims (17)
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Specification