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US 8,957,831 B1Granted
Artificial magnetic conductors
AssigneeThe Boeing Company
InventorsDaniel J. Gregoire, Carson R. White
Life of this patent
Estimating the term…
Abstract
In one embodiment an artificial magnetic conductor assembly to reflect an electromagnetic signal with a phase shift that measures between −90 degrees and +90 degrees at a target frequency comprises a first ground plane, a plurality of metallic elements disposed at a first distance from the first ground plane, a plurality of capacitors coupling adjacent metallic elements of the plurality of metallic elements, and a dielectric substrate disposed between the first ground plane and the array of metallic elements and formed from a material having a relative permittivity that measures between 1 and 20.
Claims20
An apparatus comprising:
- an artificial magnetic conductor configured to reflect an electromagnetic signal as a reflected signal, the reflected signal having a phase shift of a target frequency relative to the electromagnetic signal, the artificial magnetic conductor comprising:
- a first ground plane;
- a first dielectric substrate coupled to the first ground plane;
- a second ground plane coupled to the first dielectric substrate, wherein the first dielectric substrate is between the first ground plane and the second ground plane;
- a second dielectric substrate coupled to the first ground plane;
- a plurality of metallic elements coupled to the second dielectric substrate, wherein each metallic element of the plurality of metallic elements is a first distance from the first ground plane;
- and
- a plurality of capacitors, each capacitor of the plurality of capacitors coupled to corresponding metallic elements of the plurality of metallic elements, wherein the plurality of capacitors comprise a plurality of variable capacitors.
5 more elements
An apparatus comprising:
- an artificial magnetic conductor configured to reflect an electromagnetic signal as a reflected signal, the reflected signal having a phase shift of a target frequency relative to the electromagnetic signal, the artificial magnetic conductor comprising:
- a first ground plane;
- a first dielectric substrate coupled to the first ground plane;
- a second ground plane coupled to the first dielectric substrate, wherein the first dielectric substrate is between the first ground plane and the second ground plane;
- a second dielectric substrate coupled to the first ground plane;
- a plurality of metallic elements coupled to the second dielectric substrate, wherein each metallic element of the plurality of metallic elements is a first distance from the first ground plane;
- and
- a plurality of variable capacitors, the plurality of variable comprising a first set of variable capacitors and a second set of variable capacitors, wherein each capacitor of the first set of variable capacitors is electrically coupled to the first ground plane, and wherein each capacitor of the second set of variable capacitors is electrically coupled to the second ground plane.
5 more elements
An aircraft, comprising:
- a fuselage,
- an antenna assembly coupled to the fuselage;
- and
- an artificial magnetic conductor coupled to the antenna assembly, wherein the artificial magnetic conductor is configured to reflect an electromagnetic signal as a reflected signal, the reflected signal having a phase shift of a target frequency relative to the electromagnetic signal, the artificial magnetic conductor comprising:
- a first ground plane;
- a first dielectric substrate coupled to the first ground plane;
- a second ground plane coupled to the first dielectric substrate, wherein the first dielectric substrate is between the first ground plane and the second ground plane;
- a second dielectric substrate coupled to the first ground plane;
- a plurality of metallic elements coupled to the second dielectric substrate, wherein each metallic element of the plurality of metallic elements is a first distance from the first ground plane;
- and
- a plurality of variable capacitors, the plurality of variable comprising a first set of variable capacitors and a second set of variable capacitors, wherein each capacitor of the first set of variable capacitors is electrically coupled to the first ground plane, and wherein each capacitor of the second set of variable capacitors is electrically coupled to the second ground plane.
8 more elements
Dependencies are inferred from the claim text.