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The Effect of Ply Orientation on the Performance of Antennas in OR on Carbon Fiber Composites

By Amir Galehdar, Wayne Rowe, Kamran Ghorbani, Paul J. Callus, Sabu John, and Chun H. Wang
Progress In Electromagnetics Research, Vol. 116, 123-136, 2011


In this paper, the anisotropic conductivity effect of Quasi-Isotropic Carbon Fiber laminates on new type of conformal load-bearing antenna structure (CLAS), with slots being cut through a carbon fibre reinforced polymer (CFRP) laminate, is presented. The conductivity of a quasi-isotropic IM7/977-3 CFRP laminate is measured using the waveguide technique. The results show that orientation of the surface ply relative to the polarization of the E-field has a major influence on the reflectivity. This difference can be attributed to the fact that carbon fibres oriented parallel to the E-field plies behave as good conductors while off-axis plies as lossy dielectric layers with a finite conductivity. This anisotropic behavior of the ply layers is shown to have a distinctive influence on the operation of both microstrip patch and slot antennas.


Amir Galehdar, Wayne Rowe, Kamran Ghorbani, Paul J. Callus, Sabu John, and Chun H. Wang, "The Effect of Ply Orientation on the Performance of Antennas in OR on Carbon Fiber Composites," Progress In Electromagnetics Research, Vol. 116, 123-136, 2011.


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