| 摘要 |
The material comprises a network of conductive channels, the mean distance between interconnections (a) and the radius (r) of the channels being selected such that the material has a predetermined dielectric constant for incident radiation of a specific frequency or frequency band. The channels 1 may be wires or fibres or even colloidal particles embedded in a dielectric matrix. The material is arranged to have a plasma frequency at the frequency or in the frequency range of expected incident radiation. The plasma frequency is that frequency at which the dielectric constant is zero and thus the material acts as a reflector. The material may be used for radomes, absorbers or resonant cavities. |
