Dynamically variable frequency selective surface
First Claim
1. A method for dynamically varying a frequency response of a frequency selective surface, comprising the steps of:
- controlling a transmission of electromagnetic energy through a surface by passing selected frequencies in a pass-band and blocking selected frequencies in a stop-band; and
dynamically modifying at least one of said pass-band and said stop-band by selectively varying at least one of a position and a volume of a conductive fluid forming at least a portion of said surface.
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Accused Products
Abstract
Method for dynamically varying a frequency response of a frequency selective surface. The method can include controlling transmission of electromagnetic energy through a frequency selective surface by passing selected frequencies in a pass-band and blocking selected frequencies in a stop-band. The stop-band and the pass-band can be dynamically modified by controlling at least one of a position and a volume of a conductive fluid that forms a portion of the frequency selective surface. According to one aspect of the method, the conductive fluid can be selected to include gallium and indium alloyed with a material selected from the group consisting of tin, copper, zinc and bismuth.
23 Citations
24 Claims
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1. A method for dynamically varying a frequency response of a frequency selective surface, comprising the steps of:
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controlling a transmission of electromagnetic energy through a surface by passing selected frequencies in a pass-band and blocking selected frequencies in a stop-band; and
dynamically modifying at least one of said pass-band and said stop-band by selectively varying at least one of a position and a volume of a conductive fluid forming at least a portion of said surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A dynamically variable frequency selective surface, comprising:
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a periodic resonance structure having a plurality of elements periodically spaced over a surface, each of said elements having a resonant frequency;
a conductive fluid; and
a fluid control system dynamically varying at least one of a position and a volume of said conductive fluid within said periodic resonance structure to change at least one dimension of said plurality of elements. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A dynamically variable frequency selective surface, comprising:
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a periodic resonance structure having a plurality of elements periodically spaced over a surface, each of said elements having a resonant frequency;
a conductive fluid; and
a fluid control system for dynamically varying at least one of a position and a volume of said conductive fluid within said periodic resonance structure to change a shape of said plurality of elements.
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Specification