Slot antenna element for an array antenna
First Claim
Patent Images
1. An antenna element comprising:
- a feed circuit layer having first and second opposing surfaces with a first one of the first and second surfaces having a first ground plane disposed thereon and second one of the first and second surfaces having a feed circuit disposed thereon;
a first radiator layer having first and second opposing surfaces with a first one of the first and second opposing surfaces disposed over the second one of the first and second opposing surfaces of said feed circuit layer and a second one of the first and second opposing surfaces of said first radiator layer having a second ground plane disposed thereon with the second ground plane having an aperture therein; and
at least one conductive path coupling the first and second ground plane layers to provide a cavity in said first radiator layer and feed circuit layer.
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Abstract
A multiple beam array antenna system comprises a plurality of radiating elements provided from stripline-fed open-ended waveguide coupled to a Butler matrix beam forming network. The Butler matrix beam forming network is coupled to a switched beam combining circuit. The antenna can be fabricated as a single Low Temperature Co-fired Ceramic (LTCC) circuit.
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Citations
20 Claims
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1. An antenna element comprising:
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a feed circuit layer having first and second opposing surfaces with a first one of the first and second surfaces having a first ground plane disposed thereon and second one of the first and second surfaces having a feed circuit disposed thereon;
a first radiator layer having first and second opposing surfaces with a first one of the first and second opposing surfaces disposed over the second one of the first and second opposing surfaces of said feed circuit layer and a second one of the first and second opposing surfaces of said first radiator layer having a second ground plane disposed thereon with the second ground plane having an aperture therein; and
at least one conductive path coupling the first and second ground plane layers to provide a cavity in said first radiator layer and feed circuit layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
a conductive strip; and
a plurality of vial disposed on said conductive strip forming a cavity disposed in said plurality of radiator layers.
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6. The antenna element of claim 5 wherein at least one of the plurality of radiator layers comprises a low temperature co-fired ceramic (LTCC) substrate.
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7. The antenna element of claim 5 wherein at least one of the plurality of radiator layers comprises a tuning structure far matching an impedance of the antenna element to a predetermined impedance.
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8. The antenna element of claim 7 wherein said tuning structure is provide as an aperture in the at least one radiator layer.
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9. The antenna element of claim 5 wherein the feed circuit comprises a stripline transmission line.
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10. The antenna element of claim 5 further comprising a cover disposed on the cavity.
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11. The antenna element of claim 10 wherein the cover comprises at least one low temperature co-fired ceramic (LTCC) substrate layer and provides a tuning structure for matching an impedance of the antenna element to a predetermined impedance.
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12. The antenna element of claim 10 wherein the cover comprises at least one low temperature co-fired ceramic (LTCC) substrate layer and provides a tuning structure for matching an impedance of the feed circuit to a free space impedance.
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13. An antenna element comprising:
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a first plurality of dielectric layers, each of the plurality of dielectric layers having a conductive material disposed on selected portions thereof to provide one or more tuning structures;
a plurality of vias embedded in the plurality of dielectric layers to provide a cavity structure in the first plurality of dielectric layers; and
a feed circuit disposed in at least one of the plurality of dielectric layers electromagnetically coupled to said cavity structure. - View Dependent Claims (14, 15, 16)
an element signal port;
a first conductive via having a first end coupled to the element signal port and having a second end;
a first stripline transmission line having a first end coupled to the second end of said first conductive via and having a second end;
a second conductive via having a first end coupled to the second end of said first stripline transmission line and having a second end;
a second stripline transmission line having a first end coupled to the second end of said second conductive via and having a second end;
a third conductive via having a first end coupled to the second end of said second stripline transmission line and having a second end;
a power divider circuit having a first end coupled to the second end of said third conductive via and having a second end;
a fourth conductive via having a first end coupled to the second end of said power divider circuit and having a second end; and
a third stripline transmission line having a first end coupled to the second end of said fourth conductive via.
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17. An antenna comprising:
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an array of antenna elements, each of said antenna elements comprising;
a feed circuit layer having first and second opposing surfaces with a first one of the first and second surfaces having a first ground plane disposed thereon and a second one of the first and second surfaces having a feed circuit disposed thereon;
a radiator layer having first and second opposing surfaces with a first one of the first and second opposing surfaces disposed over the second one of the first and second opposing surfaces of said feed circuit layer and with a second one of the first and second opposing surfaces of said radiator layer having a second ground plane disposed thereon with the second ground plane having an aperture therein; and
at least one conductive path coupling the first and second ground plane layers to provide a cavity in said radiator and feed circuit layers. - View Dependent Claims (18, 19, 20)
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Specification