Multiple frequency projected artificial magnetic mirror and antenna application thereof
View Patent ↗A multiple frequency projected artificial magnetic mirror (PAMM) includes a plurality of metal traces, a metal backing, and a dielectric material. The plurality of metal traces is on one or more layers of a substrate and the metal backing is on another layer of the substrate. The dielectric material is between the metal backing and the plurality of metal traces, which is electrically coupled to the metal backing. At least some of the plurality of metal traces is of various sizes and of various positioning and spacing to create a distributed inductor-capacitor network having a first frequency band of operation and a second frequency band of operation.
1. A multiple frequency projected artificial magnetic mirror (PAMM) comprises:
a plurality of metal traces on one or more layers of a substrate, the plurality of metal traces comprising a plurality of conductive coils;
a metal backing on another layer of the substrate; and
a dielectric material between the metal backing and the plurality of metal traces, wherein the plurality of metal traces is electrically coupled to the metal backing and at least some of the plurality of metal traces are of various sizes and of various positioning and spacing to create a distributed inductor-capacitor network having at least a first frequency band of operation and a second frequency band of operation; and
wherein, for one or more of the at least first or second frequency bands of operation, the plurality of conductive coils reflect electromagnetic energy forming a projected magnetic surface effectively forming a dish antenna above the plurality metal traces.
2. The multiple frequency PAMM of claim 1 further comprises:
the various sizes of the at least some of the plurality of metal traces includes a first size to create a first inductance, a second size to create a second inductance, and a third size to create a third inductance;
the various positioning and spacing of the at least some of the plurality of metal traces includes a first positioning and spacing to create a first capacitance, a second positioning and spacing to create a second capacitance, and a third positioning and spacing to create a third capacitance, where, in the first frequency band of operation, the first inductance, the third inductance, and the second capacitance are dominant and, in the second frequency band of operation, the second inductance and the third capacitance are dominant.
3. The multiple frequency PAMM of claim 2 further comprises at least one of:
a first tuning capacitor operably coupled to in parallel with the first capacitance;
a second tuning capacitor operably coupled to in parallel with the second capacitance; and
a third tuning capacitor operably coupled to in parallel with the third capacitance.
4. The multiple frequency PAMM of claim 1 further comprises:
the plurality of metal traces on one of the one or more layers of the substrate.
5. The multiple frequency PAMM of claim 1 further comprises:
a first set of the plurality of metal traces on a first one of the one or more layers of the substrate;
a second set of the plurality of metal traces on a second one of the one or more layers of the substrate;
a second dielectric material between the first one of the one or more layers of the substrate and the second one of the one or more layers of the substrate.
6. The multiple frequency PAMM of claim 5 further comprises:
at least one of the metal traces of the first set of the plurality of metal traces is electrically coupled to at least one of the metal traces of the second set of the plurality of metal traces.
7. The multiple frequency PAMM of claim 1 further comprises:
a plurality of switches coupled to at least some of the plurality of metal traces to facilitate enabling the first frequency band of operation or the second frequency band of operation.
8. The multiple frequency PAMM of claim 1 , wherein each of the first and second bands of operation comprises at least one of:
frequency amplification;
frequency band gap;
frequency bandpass;
an electrical wall within the first or second frequency band; and
a magnetic wall within the first or second frequency band.
9. A multiple input multiple output (MIMO) antenna comprises:
a first antenna in a first antenna area on one or more layers of a substrate, wherein the first antenna is operable in a first frequency band;
a second antenna in a second antenna area on at least one of the one or more layers of the substrate, wherein the second antenna is operable in a second frequency band;
a first set of conductive coil metal traces on another one or more layers of the substrate, wherein the first set of conductive coil metal traces is in a first metal trace area of the other one or more layers of the substrate and wherein, along an axis substantially perpendicular to the one or more layers of the substrate, the first metal trace area substantially encircles the first antenna area;
a second set of conductive coil metal traces on at least one of the other one or more layers of the substrate, wherein the second set of conductive coil metal traces is in a second metal trace area of the other one or more layers of the substrate and wherein, along the axis substantially perpendicular to the one or more layers of the substrate, the second metal trace area substantially encircles the second antenna area;
a metal backing on still another layer of the substrate; and
a dielectric material between the metal backing and the first set of conductive coil metal traces and between the metal backing and the second set of conductive coil metal traces, wherein the first set of conductive coil metal traces are electrically coupled to the metal backing to create a first distributed inductor-capacitor network having a first frequency band of operation and wherein the second set of conductive coil metal traces are electrically coupled to the metal backing to create a second distributed inductor-capacitor network having a second frequency band of operation; and
wherein, for the first and second frequency bands of operation, the first and second sets of conductive coils reflect electromagnetic energy forming a projected magnetic surface effectively forming a dish antenna above the first and second set of conductive coil metal traces respectively.
10. The MIMO antenna of claim 9 further comprises:
a third plurality of conductive coil metal traces on at least one of the one or more layers of the substrate, wherein the third plurality of conductive coil metal traces is electrically coupled to the metal backing to provide an effective ground plane; and
a multiple port decoupling module operable to couple the first and second antennas to first and second signal sources, respectively, and to the effective ground plane.
11. The MIMO antenna of claim 9 further comprises:
a ground plane on at least one of the one or more layers of the substrate; and
a multiple port decoupling module operable to couple the first and second antennas to first and second signal sources, respectively, and to the ground plane.
12. The MIMO antenna of claim 9 further comprises:
the first set of conductive coil metal traces having a first size to create a first inductance and a first positioning and spacing to create a first capacitance of the first inductor-capacitor network; and
the second set of conductive coil metal traces having a second size to create a second inductance and a second positioning and spacing to create a second capacitance of the second inductor-capacitor network.
13. A multiple input multiple output (MIMO) antenna comprises:
a first antenna in a first antenna area on one or more layers of a substrate, wherein the first antenna is operable in a first frequency band;
a second antenna in a second antenna area on at least one of the one or more layers of the substrate, wherein the second antenna is operable in a second frequency band;
a plurality of conductive coil metal traces on another one or more layers of a substrate;
a metal backing on still another layer of the substrate; and
a dielectric material between the metal backing and the plurality of conductive coil metal traces, wherein the plurality of conductive coil metal traces is electrically coupled to the metal backing and are of various sizes and of various positioning and spacing to create a distributed inductor-capacitor network having the first frequency band of operation and the second frequency band of operation; and
wherein, for the first and second frequency bands of operation, the plurality of conductive coil metal traces reflect electromagnetic energy forming a projected magnetic surface effectively forming a dish antenna above the plurality of conductive coil metal traces.
14. The MIMO antenna of claim 13 further comprises:
the various sizes of the at least some of the plurality of conductive coil metal traces includes a first size to create a first inductance, a second size to create a second inductance, and a third size to create a third inductance;
the various positioning and spacing of the at least some of the plurality of conductive coil metal traces includes a first positioning and spacing to create a first capacitance, a second positioning and spacing to create a second capacitance, and a third positioning and spacing to create a third capacitance, where, in the first frequency band of operation, the first inductance, the third inductance, and the second capacitance are dominate and, in the second frequency band of operation, the second inductance and the third capacitance are dominate.
15. The MIMO antenna of claim 14 further comprises at least one of:
a first tuning capacitor operably coupled to in parallel with the first capacitance;
a second tuning capacitor operably coupled to in parallel with the second capacitance; and
a third tuning capacitor operably coupled to in parallel with the third capacitance.
16. The MIMO antenna of claim 13 further comprises:
a first set of the plurality of conductive coil metal traces on a first one of the one or more layers of the substrate;
a second set of the plurality of conductive coil metal traces on a second one of the one or more layers of the substrate;
a second dielectric material between the first one of the one or more layers of the substrate and the second one of the one or more layers of the substrate.
17. The MIMO antenna of claim 13 further comprises:
a plurality of switches coupled to at least some of the plurality of conductive coil metal traces to facilitate enabling the first frequency band of operation or the second frequency band of operation.
18. The MIMO antenna of claim 13 , wherein each of the first and second bands of operation comprises at least one of:
frequency amplification;
frequency band gap;
frequency bandpass;
an electrical wall within the first or second frequency band; and
a magnetic wall within the first or second frequency band.