Frequency-selective reflector module and system
View Patent ↗Examples disclosed herein relate to a reflector device, having a first conductive layer of substrate, a dielectric layer of substrate, and a second conductive layer patterned with a first and a second set of frequency selective elements configured to reflect an incident electromagnetic radiation beam into a plurality of reflected beams at phase angles different from that of the incident electromagnetic radiation beams.
1. A wireless communications system, comprising:
a first meta-structure reflector module configured to receive a signal from a base station, the first meta-structure reflector module comprising an array of meta-structure cells positioned atop a layer of slotted transmission lines; and
a second meta-structure reflector module configured to receive a reflection of the signal from the first meta-structure reflector module and reflect the received reflection into an angle different from the received reflection.
2. The wireless communications system of claim 1 , wherein the first meta-structure reflector module further comprises a layer of metamaterial cells.
3. The wireless communications system of claim 2 , wherein each metamaterial cell comprises a reactance control element.
4. The wireless communications system of claim 2 , wherein the metamaterial cells comprise a plurality of center cells and a plurality of edge cells surrounding the plurality of center cells.
5. The wireless communications system of claim 4 , wherein each of the plurality of center cells and each of the plurality of edge cells is configured to reflect a signal based on its location.
6. A wireless communications system for an indoor environment, comprising:
a transmitter positioned on a surface of the indoor environment and configured to transmit wireless signals at multiple frequencies; and
a plurality of active meta-structure reflector modules positioned proximate to the transmitter, each meta-structure reflector module configured to receive a signal at an incident angle and reflect the signal at a reflection angle, wherein one reflector module of the plurality of active meta-structure reflector modules comprises an array of meta-structure cells positioned atop a layer of slotted transmission lines.
7. The wireless communications system of claim 6 , wherein each of the plurality of active meta-structure reflector modules comprises an array of meta-structure cells.
8. The wireless communications system of claim 7 , wherein each meta-structure cell comprises a reactance control module configured to generate a phase shift for the received signal to be reflected at the reflection angle.
9. The wireless communications system of claim 7 , wherein the array of meta-structure cells is configured into a plurality of subarrays.
10. The wireless communications system of claim 9 , wherein each subarray is configured to reflect signals at a specific angle.
11. The wireless communications system of claim 6 , wherein the reflection angle is different from the incident angle.
12. The wireless communications system of claim 6 , wherein the plurality of active meta-structure reflector modules comprise a stack of layers each comprising an active meta-structure reflector module.
13. A wireless communications network, comprising:
a first reflector module comprising a set of frequency selective elements and configured to receive and reflect a signal from a transmitter, the first reflector module further comprising an array of meta-structure cells positioned atop a layer of slotted transmission lines; and
a second reflector module configured to receive a reflected signal from the first reflector module and further reflect the received reflected signal to a user equipment.
14. The wireless communications network of claim 13 , wherein the set of frequency selective elements comprises metamaterial elements that are configured to reflect the signal into a plurality of reflected beams at a plurality of phase angles different from that of the signal.
15. The wireless communications network of claim 14 , wherein each of the metamaterial elements comprises a reactance control element or a varactor.
16. The wireless communications network of claim 14 , wherein the metamaterial cells comprise a plurality of center cells and a plurality of edge cells surrounding the plurality of center cells.
17. The wireless communications network of claim 16 , wherein each of the plurality of center cells and each of the plurality of edge cells is configured to reflect a signal based on its location.
18. The wireless communications network of claim 13 , wherein the second reflector module is configured to reflect the received reflected signal at an angle different from an incident angle of the received reflected signal.
19. The wireless communications network of claim 13 , wherein the set of frequency selective elements comprises a first set of frequency selective elements and a second set of frequency selective elements, and wherein the first set of frequency selective elements is configured to reflect the signal at a first frequency and pass the signal through to the second set of frequency selective elements at a second frequency.
20. The wireless communications network of claim 13 , wherein the first reflector module further comprises multiple substrate layers each comprising a subset of frequency selective elements from the set of frequency selective elements.