Apparatus and methods for signal processing

1. Apparatus comprising:

a matrix;

a plurality of magnetic particles distributed in at least a portion of the matrix; the matrix being configured to enable the plurality of magnetic particles to move position relative to one another, and at least a portion of the plurality of magnetic particles being configured to magnetically repel one or more adjacent magnetic particles;

where the matrix has a Young's Modulus of less than 1 GPa.

2. Apparatus as claimed in claim 1 , wherein the matrix is configured to be substantially elastic.

3. Apparatus as claimed in claim 1 , wherein the matrix has a Young's modulus of less than 0.1 GPa.

4. Apparatus as claimed in claim 1 , wherein the plurality of magnetic particles are magnetized in substantially the same direction.

5. Apparatus as claimed in claim 1 , wherein the plurality of magnetic particles are arranged in hexagonal orders.

6. Apparatus as claimed in claim 1 , further comprising an input configured to receive an input signal and provide a force, corresponding to the input signal, to a first portion of the plurality of magnetic particles to cause the first portion of the plurality of magnetic particles to repel one or more adjacent magnetic particles.

7. Apparatus as claimed in claim 6 , wherein the input comprises an electromagnet that is configured to provide a magnetic force to the first portion of the plurality of magnetic particles.

8. Apparatus as claimed in claim 1 , further comprising an output configured to receive a magnetic field generated by a second portion of the plurality of magnetic particles and provide an output signal corresponding to the received magnetic field.

9. Apparatus as claimed in claim 8 , wherein the apparatus is configured to receive mechanical forces at the matrix, and the output is configured to provide an output signal indicative of the received mechanical forces.

10. Apparatus as claimed in claim 1 , further comprising a magnet configured to provide a magnetic field across the plurality of magnetic particles.

11. Apparatus as claimed in claim 9 , wherein the magnet is configured to provide a variable magnetic field across the plurality of magnetic particles over time.

12. A device, module or delay line comprising an apparatus as claimed in claim 1 .

13. A method comprising:

providing a plurality of magnetic particles; and

distributing the plurality of magnetic particles in at least a portion of a matrix; the matrix being configured to enable the plurality of magnetic particles to move position relative to one another, and at least a portion of the plurality of magnetic particles being configured to magnetically repel one or more adjacent magnetic particles;

where the plurality of magnetic particles are arranged in hexagonal orders.

14. A method as claimed in claim 13 , wherein the matrix is configured to be substantially elastic.

15. A method as claimed in claim 13 , further comprising providing an input configured to receive an input signal and provide a force, corresponding to the input signal, to a first portion of the plurality of magnetic particles to cause the first portion of the plurality of magnetic particles to sequentially repel one or more adjacent magnetic particles.

16. A method as claimed in claim 13 , further comprising providing an output configured to receive a magnetic field generated by a second portion of the plurality of magnetic particles and provide an output signal corresponding to the received magnetic field.

17. A method as claimed in claim 16 , further comprising configuring the apparatus to receive mechanical forces at the matrix, and the output is configured to provide an output signal indicative of the received mechanical forces.

18. A method as claimed in claim 13 , further comprising providing a magnet configured to provide a magnetic field across the plurality of magnetic particles.

19. A method comprising:

providing a plurality of magnetic particles; and

distributing the plurality of magnetic particles in at least a portion of a matrix; the matrix having a Young's Modulus of less than 1 GPa and being configured to enable the plurality of magnetic particles to move position relative to one another, and at least a portion of the plurality of magnetic particles being configured to magnetically repel one or more adjacent magnetic particles.

20. The method of claim 19 , where the matrix has a Young's modulus of less than 0.1 GPa.