Characterizing Carbon Fiber Conductivity for Structural Antenna Applications

Near‐high frequency antenna for unmanned aerial system ice‐penetrating radar

“…To convert the EAD design shown in Figure 2 to a load‐bearing component that could replace the original landing gear (hereafter referred to as the structural EAD or sEAD), the design variables considered were the material and section stiffness (i.e., the cross‐section shape) The planar design was converted to a three‐dimensional design and the antenna was fabricated from CFRP. Generally, the conductive elements of the antenna are made of metal with superior conductivity; however, the conductivity of CFRP is between 7000 and 13 000 S/m at VHF frequencies, and in Patil and Arnold, 23 it was shown that antennas fabricated with CFRP biaxial cloth material resonated at the same frequency and had radiation efficiencies within 10% of identical copper antennas. Due to lower specific strength and stiffness, equivalent sections of copper or aluminum would be 50%–500% heavier than CFRP sections; given the severe payload limitations of the UAS, a metallic antenna design would not meet the weight restrictions.…”

A zeolite templating method for fabricating edge site-enriched N-doped carbon materials

“…Until the 1950s, carbon black 1 and activated carbon 2 used as electrode materials were actively studied by researchers. In the 1960s, carbon fibers 3 and glass-like carbon 4 were synthesized, and their application scope expanded rapidly to include biomaterials, fuel cells, and nuclear fusion reactor wall materials. In the 1990s, nanocarbons, such as fullerenes described by the formula C 60 (ref.…”