Antenna array and unit cell using an artificial magnetic layer
First Claim
1. An antenna array comprising:
- a plurality of antenna unit cells disposed in an array and spaced from one another;
each antenna unit cell comprising a radiating element and a ground plane element; and
at least one artificial magnetic layer AML unit cell disposed between at least two adjacent ones of the antenna unit cells, said AML unit cell comprising at least one pair of split-ring resonators capacitively coupled to the ground plane elements of the adjacent antenna unit cells.
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Abstract
An antenna array includes a plurality of antenna unit cells, a ground plane, and at least one artificial magnetic layer AML unit cell. At least one AML unit cell is disposed between at least two adjacent ones of the antenna unit cells. The AML unit cells include a pair of split ring resonators through a ring dielectric layer, and the resonators are capacitively coupled to the a ground plane of the antenna array through a capacitor dielectric layer. The resonators are orthogonal to one another and to the ground plane, and more than one pair may be defined in each AML unit cell. Magnetic energy from the antenna unit cells induces an electric field in the resonators, and the resulting magnetic field is strongly coupled to the AML unit cell to inhibit mutual coupling between radiating elements by suppression of surface wave propagation.
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Citations
19 Claims
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1. An antenna array comprising:
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a plurality of antenna unit cells disposed in an array and spaced from one another;
each antenna unit cell comprising a radiating element and a ground plane element; andat least one artificial magnetic layer AML unit cell disposed between at least two adjacent ones of the antenna unit cells, said AML unit cell comprising at least one pair of split-ring resonators capacitively coupled to the ground plane elements of the adjacent antenna unit cells. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus comprising:
an array of unit cells disposed on a common substrate, each unit cell comprising; a first layer of dielectric material defining a first and an opposed second major surface; a second dielectric layer disposed adjacent to the first major surface; a pair of intersecting conductive traces disposed on the opposed major surface of the first layer of dielectric material; and at least four conductive vias penetrating the first layer of dielectric material but not the second layer of dielectric material, each of said conductive vias spaced from one another and coupled to a conductive trace. - View Dependent Claims (9, 10, 11, 12)
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13. A method of making an antenna array comprising:
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providing a substrate particularly adapted to retain components in spaced relation to one another; securing to the substrate a plurality of antenna unit cells, each antenna unit cell spaced from each other antenna unit cell and each antenna unit cell comprising a ground plane element spaced from a radiating element; securing to the substrate, between each pair of adjacent antenna unit cells, a tile comprising an array of artificial magnetic layer AML unit cells, each AML unit cell comprising a ring dielectric layer having a first and a second surface, a capacitor dielectric layer coupled to the first surface, a pair of conductive traces disposed adjacent to the second surface, and a set of at least four conductive vias penetrating the ring dielectric layer but not the capacitor dielectric layer, each of said conductive vias spaced from one another and coupled to the pair of conductive traces; and capacitively coupling the AML unit cell to at least one of the ground plane elements. - View Dependent Claims (14, 15, 16)
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17. An arrayed apparatus comprising:
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a plurality of means for wirelessly communicating RF energy over a frequency, said means for wirelessly communicating arrayed in spaced relation to one another; a plurality of means for inhibiting mutual coupling, each means for inhibiting mutual coupling disposed between adjacent ones of the plurality of means for wirelessly communicating RF energy, each of said means for inhibiting mutual coupling comprising at least one split ring resonator; and conductive means for electrically coupling each of the plurality of means for inhibiting mutual coupling to one another;
wherein the conductive means and each said means for inhibiting mutual coupling are disposed in a common ground plane. - View Dependent Claims (18, 19)
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Specification