Undersampled microstrip array using multilevel and space-filling shaped elements
First Claim
Patent Images
1. An antenna array comprising:
- patch antenna elements having one of the following shapes;
multilevel, space-fillings, or multilevel and space-filling;
the patch antenna elements being adapted to operate at a superior frequency mode, the superior frequency mode being at a frequency of a fundamental mode of the patch antenna elements;
the patch antenna elements featuring a higher directivity when operating at the superior frequency mode than the directivity obtained when the patch antenna elements operate at the fundamental mode;
the patch antenna elements being larger than half of a wavelength,the wavelength being an operating wavelength of the antenna as measured in a dielectric located between at least one patch antenna element and its compounding groundplane; and
the patch antenna elements being spaced in at least one direction at a distance larger than λ
from closest neighbors, λ
being a free-space operating wavelength of the antenna array.
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Abstract
An undersampled microstrip array using multilevel and space-filling shaped patch elements based on a fractal geometry achieves within the same electrical area, the same directivity than can be obtained using conventional elements as square or circular-shaped patches. However, the number of elements for the fractal-based array is less, reducing the complexity of the feeding network and overall array. Mutual coupling can be reduced avoiding radiation pattern distortions. Higher gain than that obtained using classical patch elements within the same electrical can be achieved due to the less complexity in the feeding network.
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Citations
14 Claims
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1. An antenna array comprising:
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patch antenna elements having one of the following shapes;
multilevel, space-fillings, or multilevel and space-filling;the patch antenna elements being adapted to operate at a superior frequency mode, the superior frequency mode being at a frequency of a fundamental mode of the patch antenna elements; the patch antenna elements featuring a higher directivity when operating at the superior frequency mode than the directivity obtained when the patch antenna elements operate at the fundamental mode; the patch antenna elements being larger than half of a wavelength, the wavelength being an operating wavelength of the antenna as measured in a dielectric located between at least one patch antenna element and its compounding groundplane; and the patch antenna elements being spaced in at least one direction at a distance larger than λ
from closest neighbors, λ
being a free-space operating wavelength of the antenna array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An antenna array comprising:
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patch antenna elements having one of the following shapes;
multilevel, space-filling, or multilevel and space-filling;the patch antenna elements being larger than half of a wavelength, the wavelength being an operating wavelength of the antenna as measured in a dielectric located between at least one patch antenna element and its compounding groundplane; the patch antenna elements being spaced at a distance larger than λ
from closest neighbors, λ
being a free-space operating wavelength of the antenna array; andwherein the patch antenna elements spacing is larger than λ
in one direction but less than λ
in the perpendicular direction, wherein the antenna array is formed by multilevel or space-filling shaped patches.
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Specification