Reconfigurable artificial magnetic conductor
First Claim
1. An artificial magnetic conductor (AMC) comprising:
- a frequency selective surface (FSS) including voltage variable capacitive elements to give the FSS an effective sheet capacitance which is variable to control resonant frequency of the AMC.
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Accused Products
Abstract
An electronically reconfigurable artificial magnetic conductor (RAMC) includes a frequency selective surface (FSS) having an effective sheet capacitance which is variable to control resonant frequency of the RAMC. In one embodiment, the RAMC further includes a conductive backplane structure and a spacer layer separating the conductive backplane structure and the FSS. The spacer layer includes conductive vias extending between the conductive backplane structure and the FSS, and voltage variable capacitive circuit elements coupled with the FSS and responsive to bias voltages applied on one or more bias signal lines routed through the conductive backplane structure and the conductive vias.
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Citations
43 Claims
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1. An artificial magnetic conductor (AMC) comprising:
a frequency selective surface (FSS) including voltage variable capacitive elements to give the FSS an effective sheet capacitance which is variable to control resonant frequency of the AMC. - View Dependent Claims (2, 3, 4, 5)
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6. An artificial magnetic conductor (AMC) comprising:
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a frequency selective surface (FSS) having conductive patches disposed thereon;
a conductive backplane structure;
a spacer layer separating the conductive backplane structure and the FSS, the spacer layer including conductive vias extending between the conductive backplane structure and the FSS; and
voltage variable capacitive circuit elements coupled between conductive patches of the FSS and responsive to one or more bias signal lines routed through the conductive backplane structure and the conductive vias. - View Dependent Claims (7, 8, 9, 10, 11)
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12. An artificial magnetic conductor (AMC) comprising:
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a frequency selective surface (FSS) including a periodic array of conductive patches;
a spacer layer including vias extending therethrough in association with predetermined conductive patches of the FSS; and
a conducting backplane structure including two or more bias signal lines, the AMC characterized by a unit cell including in a first plane, a pattern of three or more conductive patches, one conductive patch electrically coupled with an associated conductive via, and voltage variable capacitive elements between selected laterally adjacent conductive patches; and
a conductive backplane segment extending in a second plane substantially parallel to a plane including the three or more conductive patches and the associated conductive via extending from the one conductive patch to one of the two or more bias signal lines. - View Dependent Claims (13, 14, 15, 16)
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17. An artificial magnetic conductor (AMC) comprising:
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a frequency selective surface (FSS) including a periodic array of conductive patches;
a spacer layer including vias extending therethrough in association with predetermined conductive patches of the FSS; and
a conducting backplane structure including two or more bias signal lines, the AMC characterized by a unit cell including in a first plane, a pattern of three or more conductive patches disposed on a first side of a dielectric layer, each conductive patch electrically coupled with an associated conductive via, and radio frequency (RF) switch elements between laterally adjacent conductive patches, each conductive patch overlapping at least in part a spaced conductive patch of a plurality of spaced conductive patches disposed on a second side of the dielectric layer; and
in a second plane, a conductive backplane segment extending in a plane substantially parallel to a plane including the three or more conductive patches and the associated conductive vias extending from the each conductive patch to one of the two or more bias signal lines. - View Dependent Claims (18, 19, 20)
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21. A method for reconfiguring an artificial magnetic conductor (AMC) including a frequency selective surface (FSS) having a pattern of conductive patches, a conductive backplane structure and a spacer layer separating the FSS and the conductive backplane structure, the method comprising:
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applying control bias signals to voltage variable capacitive elements associated with the FSS; and
thereby, reconfiguring effective sheet capacitance of the FSS. - View Dependent Claims (22, 23)
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24. An artificial magnetic conductor (AMC) comprising:
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a frequency selective surface (FSS) having a pattern of conductive patches;
a conductive backplane structure; and
a spacer layer separating the FSS and the conductive backplane structure, the spacer layer including conductive vias associated with some but not all patches of the pattern of conductive patches. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A high impedance surface comprising:
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a frequency selective surface (FSS) patterned with conductive patches;
a conductive ground plane; and
a layer separating the FSS and the conductive ground plane, the layer including a dielectric material pierced by a partial forest of conductive vias.
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36. An artificial magnetic conductor (AMC) comprising:
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a frequency selective surface (FSS) having a single layer of conductive patches disposed on a dielectric layer and an effective sheet capacitance which is able to control resonant frequency of the AMC; and
voltage variable capacitors between selected conductive patches. - View Dependent Claims (37, 38, 39, 40)
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41. An artificial magnetic conductor (AMC) comprising:
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a frequency selective surface (FSS);
a conductive backplane structure;
a spacer layer separating the conductive backplane structure and the FSS, the spacer layer including conductive vias extending between the conductive backplane structure and the FSS;
voltage variable capacitive circuit elements coupled with the FSS and responsive to bias signals on one or more bias signal lines routed through the conductive backplane structure and the conductive vias; and
ballast resistors coupled in parallel with the voltage variable capacitive circuit elements.
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42. An artificial magnetic conductor (AMC) comprising:
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a frequency selective surface (FSS) including a dielectric layer with a first layer of conductive patches disposed on one side of the dielectric layer and a second layer of conductive patches disposed on a second side of the dielectric layer to at least partially overlap conductive patches of the first layer of conductive patches;
a conductive backplane structure;
a spacer layer separating the conductive backplane structure and the FSS, the spacer layer including conductive vias extending between the conductive backplane structure and the FSS; and
voltage variable capacitive circuit elements coupled with the FSS and responsive to one or more bias signal lines routed through the conductive backplane structure and the conductive vias. - View Dependent Claims (43)
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Specification