permittivity is proportional to conductivity and imaginary permittivity of metals is near infinite fig5 b is also revealing in the sense that real and imaginary permittivities are on the intersection course at a higher frequency the intersection denoting the percolation threshold which is indicative of onset of electrical conductivity so fig5 b is indicative of the fact that composites with 12 loading are far removed from the percolation threshold at loadings that begin to approach the percolation threshold it is typical to observe a frequency dependency of the dielectric constant as in fig5 b it should be noted that the exact frequency dispersion is not readily reproduced the experimental error becomes quite large at the higher loadings it is presumed that at samples near the percolation threshold have minor variations in the local fiber distribution can lead to relatively large differences in measured properties fig5 c shows real circles and imaginary squares permittivities at a frequency of 5 ghz as a function of metallized loading of from 0 to 12 this shows a typical pattern where the real permittivity increases faster with loading than the imaginary permittivity the imaginary permittivity component is proportional to the electrical conductivity of the composite and will take on high values when the loading reaches the percolation threshold where inter fiber yields conductive paths of relatively long dimensions conductivity measurements in dc are shown as in insert in fig5 c measurable conductivity was detected in samples of 4 fiber and higher the measured values are extremely low and do not show critical behavior from this it is concluded that all samples are significantly.