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US 2010/0073261 A1Published application
Tunable frequency selective surface
AssigneeHRL Laboratories, LLC
InventorDaniel F. SIEVENPIPER
Life of this patent
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Abstract
An apparatus and methods for operating a frequency selective surface are disclosed. The apparatus can be tuned to an on/off state or transmit/reflect electromagnetic energy in any frequency. The methods disclosed teach how to tune the frequency selective surface to an on/off state or transmit/reflect electromagnetic energy in any frequency.
Claims23
A method of achieving an opaque state in at least a region of a tunable frequency selective surface, the method comprising:
- applying a plurality of voltages to conductors disposed on a first major surface and on a second major surface of the tunable frequency selective surface so as to cause a plurality of varactors coupling the conductors to be forward-biased and to cause the at least a region of the tunable frequency selective surface to be in the opaque state.
A method of tuning at least a region of a tunable frequency selective surface, the method comprising:
- disposing a plurality of conductors on first and second major surfaces of the tunable frequency selective surface, wherein each conductor on the first surface is arranged to run along one length of the tunable frequency selective surface and each conductor on the second surface is arranged to run along another length of the tunable frequency selective surface, and
- applying a plurality of voltages to the conductors disposed on the first major surface and on the second major surface of the tunable frequency selective surface so as to cause a plurality of varactors coupling the conductors to be reverse biased and to cause the at least a region of the tunable frequency selective surface to be tuned to a frequency.
The method of tuning each region of a tunable frequency selective surface to a different resonance frequency, the method comprising:
- partitioning a tunable frequency selective surface into a plurality of regions, wherein each region of the tunable frequency selective surface contains a first major surface and a second major surface;
- determining which of the regions of the tunable frequency selective surface are to be tuned to which resonance frequency;
- providing the first major surface of each of the regions with a distinct first voltage;
- applying the distinct first voltage to alternating conductors in each one of the regions, wherein the alternating conductors are disposed along a length of the first major surface;
- providing the first major surface of each of the regions with a distinct second voltage;
- applying the distinct second voltage to remaining conductors in each one of the regions, so as to cause varactors in each of the regions to be reverse biased and tuned to a resonance frequency determined for that region, wherein the remaining conductors are disposed along the length of the first major surface;
- providing the second major surface of each of the regions with a distinct third voltage;
- applying the distinct third voltage to alternating conductors in each one of the regions, wherein the alternating conductors are disposed along a width of the second major surface;
- providing the second major surface of each of the regions with a distinct fourth voltage;
- applying the distinct fourth voltage to remaining conductors in each one of the regions, so as to cause varactors in each of the regions to be reverse biased and tuned to a resonance frequency determined for that region, wherein the remaining conductors are disposed along the width of the second major surface.
7 more elements
The method of tuning each region of a tunable frequency selective surface to a different resonance frequency or an opaque state, the method comprising:
- partitioning a tunable frequency selective surface into a plurality of regions, wherein each region of the tunable frequency selective surface contains a first major surface and a second major surface;
- determining which of the regions of the tunable frequency selective surface are to be tuned to a resonance frequency;
- determining which of the regions of the tunable frequency selective surface are to be tuned to the opaque state;
- providing the first major surface of each of the regions with a distinct first voltage;
- applying the distinct first voltage to alternating conductors in each one of the regions, wherein the alternating conductors are disposed along a length of the first major surface;
- providing the first major surface of each of the regions with a distinct second voltage;
- applying the distinct second voltage to remaining conductors in each one of the regions, so as to cause varactors in each of the regions to be reverse biased and tuned to a resonance frequency or the opaque state as determined for that region, wherein the remaining conductors are disposed along the length of the first major surface;
- providing the second major surface of each of the regions with a distinct third voltage;
- applying the distinct third voltage to alternating conductors in each one of the regions, wherein the alternating conductors are disposed along a width of the second major surface;
- providing the second major surface of each of the regions with a distinct fourth voltage;
- applying the distinct fourth voltage to remaining conductors in each one of the regions, so as to cause varactors in each of the regions to be reverse biased and tuned to a resonance frequency or the opaque state as determined for that region, wherein the remaining conductors are disposed along the width of the second major surface.
8 more elements
Dependencies are inferred from the claim text.