Passive anti-jamming antenna system

1. In an environment comprising a plurality of sources of electromagnetic energy, an antenna system comprising:

a plurality of receiving antenna elements;

a partitioning structure:

positioned between the elements and the sources,

disposed to create at least two non-identical radio frequency fields of view; and

at least one absorber substantially lining at least one wall of the partitioning structure, the at least one absorber having a predetermined index of refraction that is different from a predetermined index of refraction of the at least one wall.

2. The antenna system according to claim 1 , further comprising:

a processing unit:

in electrical communication with at least two antenna elements;

operative to receive the electrical signal of each communicated antenna element;

operative to characterize the electrical signal of each communicated antenna element; and

operative to modify those electrical signals for which the characterization meets a condition.

3. The antenna system according to claim 2 , wherein the characterization of the electrical signal of each communicated antenna element comprises a function of the power such electrical signal.

4. The antenna system according to claim 3 , wherein the condition for modification is that the function of the power of the characterized electrical signal exceeds a threshold.

5. The antenna system according to claim 4 , wherein the modification of those electrical signals for which power is greater than a threshold is attenuation.

6. The antenna system according to claim 5 , wherein the modification of those electrical signals for which power is greater than a threshold is blocking.

7. The antenna system according to claim 2 , further comprising, a combiner:

in electrical communication with at the processing unit; and

operative to receive at least two electrical signals from the processing unit and combine the signals.

8. The antenna system according to claim 1 , further comprising an outer skin substantially covering at least a portion of the partitioning structure.

9. The antenna system according to claim 8 , wherein the outer skin is a bandpass filter.

10. The antenna system according to claim 1 , wherein the partitioning structure comprises a plurality of hex-shaped walls.

11. In an antenna system comprising a plurality of antenna elements, a method for improving the resistance of the antenna system to interference from electromagnetic energy sources, the method comprising:

physically partitioning, using a partitioning structure, the space between the receiving antenna array and the electromagnetic energy sources such that at least two antenna elements are characterized by nonidentical radio frequency fields of view; and substantially coating at least one surface of the partitioning structure with an absorber, the at least one absorber having a predetermined index of refraction that is different from a predetermined index of refraction of the partitioning structure.

12. The method according to claim 11 , further comprising:

in response to electromagnetic energy incident on the antenna array, determining which array elements contain energy characteristic of interference; and

modifying the signal from at least one array element that contains energy characteristic of interference.

13. The method according to claim 12 , wherein the step of modification comprises broadband attenuation of the signal from at least one antenna element that contains energy characteristic of interference.

14. The method according to claim 12 , wherein the step of modification comprises blocking the electromagnetic energy from at least one antenna element that contains energy characteristic of interference.