Textile-Based Flexible Coaxial Cable with Improved EMC

Abstract

This paper examines the performance of a modified textile-based coaxial cable with enhanced electromagnetic shielding. The improved design integrates hybrid threads, specialized coating, and advanced textile materials to optimize RF transmission in a flexible, textile coaxial structure. The core consists of a polyurethane-coated hybrid thread, ensuring durability and mechanical flexibility, while a double-layered PESh insulator improves dielectric performance. The outer shielding, which is the primary focus of the enhancement, has been densified and reinforced with a double braid, resulting in a significant reduction of surface transfer impedance ZT and improved signal transmission characteristics. To evaluate robustness under real-world conditions, the textile coaxial cable was subjected to mechanical stress tests, including bending cycles, to assess signal stability under deformation. Furthermore, environmental testing was conducted to examine performance under varying climatic conditions, such as humidity and temperature fluctuations. These tests confirmed that the enhanced structure maintains consistent RF transmission and shielding effectiveness even under mechanical strain and environmental exposure. Electrical performance was validated using a Vector Network Analyzer (VNA), with scattering parameter analysis confirming the effectiveness of the modified shielding design. These findings demonstrate the potential of textile-based coaxial cables for use in wearable electronics, conformal antennas, and textile-integrated IoT systems, offering a promising pathway for further material and structural optimization in flexible RF interconnects.