Microstrip antenna with an edge ground structure
First Claim
Patent Images
1. A microstrip antenna comprising:
- a dielectric substrate;
a patch antenna element on the top of the dielectric substrate;
a ground connected to the dielectric substrate, said ground including a ground structure that extends above the bottom of the dielectric substrate, said ground structure physically contacting the dielectric substrate without physically contacting the patch antenna element;
a feeder connected to the patch antenna element; and
a short-maker connecting the patch antenna element and the ground.
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Abstract
In a microstrip patch antenna, multipath signals from below the horizon can be reduced by forming ground elements along the edge of the dielectric substrate. Additionally, by using lugs and capacitive elements in the patch antenna, the bandwidth of the antenna can be expanded while maintaining all other antenna characteristics as good as possible.
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Citations
40 Claims
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1. A microstrip antenna comprising:
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a dielectric substrate; a patch antenna element on the top of the dielectric substrate; a ground connected to the dielectric substrate, said ground including a ground structure that extends above the bottom of the dielectric substrate, said ground structure physically contacting the dielectric substrate without physically contacting the patch antenna element; a feeder connected to the patch antenna element; and a short-maker connecting the patch antenna element and the ground. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A microstrip antenna comprising:
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a dielectric substrate; a patch antenna element on the top of the dielectric substrate; a ground connected to the dielectric substrate, said ground including a ground structure that extends above the bottom of the dielectric substrate, said ground structure physically contacting the dielectric substrate, wherein the ground structure is arranged along a substantially circular path; a feeder connected to the patch antenna element; and a short-maker connecting the patch antenna element and the ground. - View Dependent Claims (13, 14)
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15. A microstrip antenna comprising:
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a dielectric substrate; a patch antenna element on the top of the dielectric substrate, wherein the patch antenna element includes a rectangular region with additional lugs and capacitively coupled elements; a ground connected to the dielectric substrate, said ground including a ground structure that extends above the bottom of the dielectric substrate, said ground structure physically contacting the dielectric substrate; a feeder connected to the patch antenna element; and a short-maker connecting the patch antenna element and the ground. - View Dependent Claims (16, 17)
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18. A microstrip antenna comprising:
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a dielectric substrate; a patch antenna element on the top of the dielectric substrate; a ground connected to the dielectric substrate, said ground including a ground structure that extends above the bottom of the dielectric substrate, said ground structure physically contacting the dielectric substrate and comprising a number of conductive vias formed through the dielectric substrate, wherein the conductive vias are closely spaced and surround the patch antenna element; a feeder connected to the patch antenna element; and a short-maker connecting the patch antenna element and the ground.
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19. A microstrip antenna comprising:
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a dielectric substrate; a patch antenna element on the top of the substrate, the patch antenna element including a rectangular region with additional lugs and capacitively coupled elements to provide an expansion of the frequency bandwidth of the antenna, the combined area of the lugs being 0.5 to 4.5% of the area of the rectangular region, and the combined area of the capacitively coupled elements being 3.5 to 9.5% of the area of the rectangular region; a ground connected to the dielectric substrate; a feeder connected to the patch antenna element; and a short-maker connecting the patch antenna element and the ground. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A microstrip antenna comprising:
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a dielectric substrate; a patch antenna element on the top of the substrate, the patch antenna element including a rectangular region with additional lugs and capacitively coupled elements, the lugs and adjacent capacitively coupled elements providing an expansion of the frequency bandwidth of the antenna, wherein a first lug is attached at a corner of the rectangular region, a second lug is attached at a side of the rectangular region adjacent to the corner and at least one capacitively coupled element is near each of the other sides of the rectangular region; a ground connected to the dielectric substrate; a feeder connected to the patch antenna element; and a short-maker connecting the patch antenna element and the ground. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34)
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35. A microstrip antenna comprising:
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a dielectric substrate; a patch antenna element on the top of the substrate, the patch antenna element including a rectangular region with additional lugs and capacitively coupled elements to provide an expansion of the frequency bandwidth of the antenna; a ground connected to the dielectric substrate, the ground including a ground structure that extends above the bottom of the substrate, the ground structure physically contacting the dielectric substrate; a feeder connected to the patch antenna element; and a short-maker connecting the patch antenna element and the ground. - View Dependent Claims (36, 37, 38, 39, 40)
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Specification