Pixelized frequency selective surfaces for reconfigurable artificial magnetically conducting ground planes
First Claim
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1. A reconfigurable frequency selective surface (FSS) comprising:
- a plurality of conducting patches supported on a first surface of a dielectric material; and
a plurality of switches, each switch electrically interconnecting at least two of the plurality of conducting patches when the switch is selected,wherein a first ensemble of switches is selectable so as to provide a first configuration of electrically interconnected conducting patches, anda second ensemble of switches is selectable so as to provide a second configuration of electrically interconnected conducting patches,the reconfigurable FSS being part of an artificial magnetic conductor (AMC) ground plane of an antenna,the AMC further including the dielectric material and an electrically conducting sheet on a second surface of the dielectric material.
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Abstract
A reconfigurable frequency selective surface (FSS) includes a plurality of conducting patches supported on the surface of a dielectric layer, with selectable electrical interconnections between the conducting patches so as to provide a desired characteristic. The reconfigurable FSS can be used in a reconfigurable artificial magnetic conductor (AMC). A reconfigurable AMC includes a dielectric layer, a conducting back-plane on one surface of the dielectric layer, and a reconfigurable FSS on the other surface of the dielectric layer. A reconfigurable AMC can be used as a dynamically reconfigurable ground plane for a low-profile antenna system.
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Citations
25 Claims
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1. A reconfigurable frequency selective surface (FSS) comprising:
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a plurality of conducting patches supported on a first surface of a dielectric material; and a plurality of switches, each switch electrically interconnecting at least two of the plurality of conducting patches when the switch is selected, wherein a first ensemble of switches is selectable so as to provide a first configuration of electrically interconnected conducting patches, and a second ensemble of switches is selectable so as to provide a second configuration of electrically interconnected conducting patches, the reconfigurable FSS being part of an artificial magnetic conductor (AMC) ground plane of an antenna, the AMC further including the dielectric material and an electrically conducting sheet on a second surface of the dielectric material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A reconfigurable frequency selective surface (ESS) comprising:
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a plurality of conducting patches, the conducting patches being supported on a first surface of a dielectric material; and a plurality of switches, each switch electrically interconnecting at least two of the plurality of conducting patches when the switch is selected, the conducting patches being selectively electrically interconnected in an electrical interconnection configuration, the electrical interconnection configuration comprising a plurality of selected switches, each switch acting as a closed circuit when selected, and as an open circuit when not selected, switches being selected using electrical signals applied to the switches, the electrical signals not being applied to the conducting patches, wherein a resonance frequency of the frequency selective surface is adjustable through a modification of the electrical interconnection configuration, the reconfigurable FSS being part of an artificial magnetic conductor (AMC), the AMC further including the dielectric material and an electrically conducting sheet substantially adjacent to a second surface of the dielectric material, the electrically conducting sheet being a continuous sheet opposing the plurality of conducting patches. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An artificial magnetic conductor (AMC), the AMC comprising:
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a dielectric material having a first surface and a second surface; a plurality of electrically conducting patches supported by the first surface of the dielectric material; and an electrically conducting sheet substantially adjacent to the second surface of the dielectric material, the electrically conducting sheet being a continuous sheet opposing the plurality of conducting patches, wherein the electrically conducting patches have an electrical interconnection configuration comprising electrical switches, the electrical interconnection configuration being reconfigurable through selection of one or more of the electrical switches so as to change a resonance frequency of the reconfigurable AMC, the reconfigurable AMC behaving as a magnetic conductor at the resonance frequency, wherein the electrical switches each comprise a transistor. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification