Frequency selective surface
First Claim
1. A frequency selective surface (FSS), wherein the FSS comprises multiple FSS units that are uniformly arranged, each FSS unit comprising a dielectric slab and N square-ring metal patches and a cross-shaped metal patch, whereinthe cross-shaped metal patch is adhered to the first surface of the dielectric slab, and divides the first surface of the dielectric slab into four parts, each part having a same size and a same quantity of the square-ring metal patches, whereinlengths of the cross-shaped metal patch in two mutually perpendicular directions are equal, a length in each direction is 0.25 to 0.75 times of a first wavelength, and a width of a gap between adjacent patches is 0.02 to 0.06 times a second wavelength, the first wavelength being a wavelength in the dielectric slab and corresponding to a transmission band center frequency of the FSS, and the second wavelength being a wavelength in vacuum and corresponding to a reflection band center frequency of the FSS;
- andthe N square-ring metal patches are adhered to the first surface of the dielectric slab and are arranged uniformly, N being a positive integer power of 4.
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Accused Products
Abstract
Embodiments provide a frequency selective surface (FSS). The FSS includes uniformly arranged FSS units. Each FSS unit includes a dielectric slab, a cross-shaped metal patch, and N square-ring metal patches. The cross-shaped metal patch is adhered to a first surface of the dielectric slab, and divides the first surface of the dielectric slab into four parts. Each part has a same size and a same quantity of the square-ring metal patches. The N square-ring metal patches are adhered to the first surface of the dielectric slab, and are arranged uniformly, and N is a positive integer power of 4. Lengths of the cross-shaped metal patch in two mutually perpendicular directions are equal, and both a length in each direction and a width of a gap between adjacent patches need to meet a specific condition.
22 Citations
12 Claims
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1. A frequency selective surface (FSS), wherein the FSS comprises multiple FSS units that are uniformly arranged, each FSS unit comprising a dielectric slab and N square-ring metal patches and a cross-shaped metal patch, wherein
the cross-shaped metal patch is adhered to the first surface of the dielectric slab, and divides the first surface of the dielectric slab into four parts, each part having a same size and a same quantity of the square-ring metal patches, wherein lengths of the cross-shaped metal patch in two mutually perpendicular directions are equal, a length in each direction is 0.25 to 0.75 times of a first wavelength, and a width of a gap between adjacent patches is 0.02 to 0.06 times a second wavelength, the first wavelength being a wavelength in the dielectric slab and corresponding to a transmission band center frequency of the FSS, and the second wavelength being a wavelength in vacuum and corresponding to a reflection band center frequency of the FSS; - and
the N square-ring metal patches are adhered to the first surface of the dielectric slab and are arranged uniformly, N being a positive integer power of 4. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An antenna, wherein the antenna comprises a primary reflector, a frequency selective surface (FSS), and a low frequency feed and a high frequency feed share the primary reflector, wherein the FSS comprises multiple FSS units that are uniformly arranged, each FSS unit comprising a dielectric slab and N square-ring metal patches, and a cross-shaped metal patch, wherein
the cross-shaped metal patch is adhered to the first surface of the dielectric slab, and divides the first surface of the dielectric slab into four parts, each part having a same size and a same quantity of the square-ring metal patches, wherein lengths of the cross-shaped metal patch in two mutually perpendicular directions are equal, a length in each direction is 0.25 to 0.75 times of a first wavelength, and a width of a gap between adjacent patches is 0.02 to 0.06 times of a second wavelength, the first wavelength being a wavelength in the dielectric slab and corresponding to a transmission band center frequency of the FSS, and the second wavelength is a wavelength in vacuum and corresponding to a reflection band center frequency of the FSS; - and
the N square-ring metal patches are adhered to the first surface of the dielectric slab and are arranged, N being a positive integer power of 4. - View Dependent Claims (9, 10, 11, 12)
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Specification