Advanced Microwave Absorption in Woven Structures: The Role of Conductivity-Polarization Loss Synergy

Abstract

Optimizing the synergy between conductivity and polarization losses is essential for enhancing microwave absorption (MA) performance. Herein, an optimal conductivity-polarization loss ratio is identified by integrating the Cole–Cole formula with transmission line principles. The ideal ratio was determined to be within the range of 0.22–0.41. Utilizing this ratio as a guideline, double-layer SiC fiber weaving (DSW) materials underwent algorithmic optimization, leading to significant improvements in polarization loss. To precisely adjust the loss contribution rate, three distinct types of shortcut fibers with varying conductivities were incorporated into a paraffin matrix, facilitating the design of a tailored conductive loss contribution. Experimental results demonstrated that DSW with negligible conductivity loss could not achieve effective absorption. In contrast, the MA performance of chopped carbon fiber/DSW composites improved with adjustments to conductivity, exhibiting an absorption band ranging from 8.2 to 12.4 GHz as the loss contributions approached the optimal ratio. This pioneering investigation into the interactions among various loss mechanisms and MA performance lays the groundwork for the development of high-performance MA materials and provides valuable insights for future research and applications.