Method and apparatus for a frequency-selective antenna

1. A frequency-selective antenna system, comprising:

a transceiver unit configured to receive a composite communication signal, wherein the composite communication signal is a mix of multiple individual communication signals transmitted at different frequencies;

a radiating structure comprising multiple subarrays of radiating elements, each subarray responsive to a different frequency; and

an antenna controller comprising a mapping module configured to map a user equipment to a specific frequency and a radiating element control module configured to control the radiating elements within each subarray, the antenna controller configured to change a phase of each radiating element within each subarray and to direct each individual communication signal in the composite communication signal to a corresponding user equipment in a specific direction provided by the transceiver unit.

2. The frequency-selective antenna system of claim 1 , wherein the radiating structure comprises a metastructure.

3. The frequency-selective antenna system of claim 1 , wherein the radiating elements comprises metamaterial cells.

4. The frequency-selective antenna system of claim 3 , wherein at least one of the metamaterial cells comprises a reactance control mechanism.

5. The frequency-selective antenna system of claim 4 , wherein the reactance control mechanism is a varactor coupled between a conductive area and a conductive loop in the at least one metamaterial cell.

6. The frequency-selective antenna system of claim 4 , wherein the electrical parameter comprises a reactance of the varactor changed by a reverse biased voltage.

7. The frequency-selective antenna system of claim 1 , wherein the radiating structure radiates the multiple individual communication signals concurrently.

8. The frequency-selective antenna system of claim 1 , further comprising a lookup table to store a correspondence between radiating elements and associated frequencies, wherein the mapping module is configured to retrieve information related to the radiating elements and associated frequencies.

9. A frequency-selective metastructure antenna, comprising:

a first set of metastructure cells responsive to a first frequency;

a second set of metastructure cells responsive to a second frequency;

a set of electrical parameter control devices, wherein each electrical parameter control device is to alter an electrical parameter of at least one metastructure cell and change a phase of the at least one metastructure cell to direct a beam to a user equipment in a specific direction; and

a mapping module configured to map the user equipment to one of the first frequency or the second frequency.

10. The frequency-selective metastructure antenna of claim 9 , wherein the first set and second set of metastructure cells comprise metamaterial cells.

11. The frequency-selective metastructure antenna of claim 9 , wherein the first set of metamaterial cells is not responsive to the second frequency, and the second set of metamaterial cells is not responsive to the first frequency.

12. The frequency-selective metastructure antenna of claim 11 , further comprising a transceiver unit configured receive a composite mix of a first communication signal at the first frequency and a second communication signal at the second frequency.

13. The frequency-selective metastructure antenna of claim 9 , wherein the electrical parameter comprises a reactance of the at least one metamaterial cell and the set of electrical parameter control devices comprises a varactor.

14. The frequency-selective metastructure antenna of claim 9 , wherein a set of electrical parameter control devices for the first set of metastructure cells alters the reactance of the first set of metastructure cells to direct a radiation beam in the specific direction.

15. The frequency-selective metastructure antenna of claim 9 , wherein each metastructure cell has a corresponding electrical parameter control device and the electrical parameter of each metastructure cell is adjusted individually.

16. A method for performing frequency-selective transmissions from a metastructure antenna to a user, comprising:

directing a transmission to a user equipment of the user;

mapping the user equipment to a first frequency from a list of associated frequencies corresponding to radiating elements of a frequency-selective first subarray of metastructure cells;

assigning the first frequency to the transmission to the user;

generating the transmission at the first frequency; and

controlling the frequency-selective first subarray of metastructure cells to change a phase of each metastructure cell within the first subarray and direct the transmission to the first user in a specific direction.

17. The method of claim 16 , further comprising controlling a frequency-selective second subarray of metastructure cells to direct another transmission to a second user equipment.

18. The method of claim 16 , further comprising storing a correspondence between metastructure cells and associated frequencies.

19. The method of claim 16 , wherein the metastructure cells comprise metamaterial cells and the metastructure antenna comprises a multi-layer metastructure antenna.

20. The method of claim 16 , wherein controlling a frequency-selective first subarray of metastructure cells comprises controlling a reactance of each metastructure cell according to the specific direction.