Additively manufactured modular aperture (AMMA) stacked patch antenna
An antenna assembly includes a first dielectric material, a ground plane above the first dielectric material, and two or more patch antennas above the ground plane. In an example, the ground plane has a first aperture slot, and a second aperture slot that is non-intersecting with the first aperture slot. The antenna assembly further includes a second dielectric material separating the two or more patch antennas from the ground plane. In an example, the first dielectric material comprises a printed circuit board (PCB). In some examples, the ground plane and the two or more patch antennas are manufactured using additive manufacturing techniques (such as three-dimensional printing techniques), and in some such examples, the second dielectric material includes dielectric foam. For example, the dielectric foam supports the two or more patch antennas above the ground plane.
1. An antenna assembly comprising:
a first dielectric material;
a ground plane above the first dielectric material, the ground plane having a first aperture slot, and a second aperture slot that is non-intersecting with the first aperture slot;
two or more patch antennas above the ground plane; and
a second dielectric material separating the two or more patch antennas from the ground plane;
wherein the first aperture slot and the second aperture slot are substantially symmetrical with each other about an imaginary plane of symmetry that divides the ground plane into two substantially symmetrical halves, the imaginary plane orthogonal to the ground plane.
2. The antenna assembly of claim 1 , wherein the two or more patch antennas comprise (i) a first patch antenna above the ground plane, and (ii) a second patch antenna above the first patch antenna, wherein the second dielectric material further separates the first patch antenna from the second patch antenna.
3. The antenna assembly of claim 1 , wherein the second dielectric material comprises dielectric foam.
4. The antenna assembly of claim 1 , wherein the second dielectric material has a dielectric constant that is lower than a dielectric constant of the first dielectric material.
5. The antenna assembly of claim 1 , wherein the second dielectric material has a dielectric constant that is less than 2.0.
6. The antenna assembly of claim 1 , wherein the first dielectric material comprises a printed circuit board (PCB).
7. The antenna assembly of claim 1 , further comprising:
a first feed line at least in part below the first aperture slot, and a second feed line at least in part below the second aperture slot, wherein no portion of the first feed line is below the second aperture slot and no portion of the second feed line is below the first aperture slot, and wherein the first and second feed lines are symmetrical with each other about the imaginary plane.
8. The antenna assembly of claim 7 , wherein the first dielectric material is between the ground plane and the first and second feed lines.
9. The antenna assembly of claim 1 , wherein the two or more patch antennas comprise (i) a first patch antenna above the ground plane, and (ii) a second patch antenna above the first patch antenna, and wherein the imaginary plane divides each of the first patch antenna and the second patch antenna into corresponding substantially symmetrical halves.
10. The antenna assembly of claim 1 , wherein the two or more patch antennas comprise (i) a first lower patch antenna above the ground plane, and (ii) a first upper patch antenna above the first lower patch antenna, wherein the first and second aperture slots are at least in part below the first lower patch antenna, and wherein the antenna assembly further comprises:
a second lower patch antenna above the ground plane, and a second upper patch antenna above the second lower patch antenna, wherein the first and second lower patch antennas are coplanar, and wherein the first and second upper patch antennas are coplanar;
wherein the ground plane further comprises a third aperture slot, and a fourth aperture slot that is non-intersecting with the third aperture slot, wherein the third and fourth aperture slots are below the second lower patch antenna.
11. The antenna assembly of claim 10 , wherein the second dielectric material separates the first lower patch antenna, the first upper patch antenna, the second lower patch antenna, the second upper patch antenna, and the ground plane from each other.
12. The antenna assembly of claim 1 , wherein antenna assembly has a bandwidth ratio of at least 2:1.