Carbon Fiber Reinforced Polymer with Shredded Fibers: Quasi-Isotropic Material Properties and Antenna Performance

الملخص EN

A carbon fiber reinforced polymer (CFRP) laminate, with the top layer consisting of shredded fibers, is proposed and manufactured.

The shredded fibers are aligned randomly on the surface to achieve a more isotropic conductivity, as is desired in antenna applications.

Moreover, fiber shreds can be recycled from carbon fiber composites.

Conductivity, permittivity, and permeability are obtained with the Nicolson-Ross-Weir method from material samples measured inside rectangular waveguides in the frequency range of 4 to 6 GHz.

The decrease in material anisotropy results in negligible influence on antennas.

This is shown by measuring the proposed CFRP as ground plane material for both a narrowband wire monopole antenna for 5.9 GHz and an ultrawideband conical monopole antenna for 1–10 GHz.

For comparison, all measurements are repeated with a twill-weave CFRP.