Traditional antennas are mostly made of metal materials, while the application of non-metallic materials in antenna design can bring a series of novel excellent characteristics and flexibility. For example, stealth, low-cost, reconfigurable, lightweight, or specificity of technical performance. Liquid, gas, plasma, and solid dielectric materials can all become the basic materials for antennas. The topic of this session is to share the ideas of how to design and optimize antennas using these non-metallic materials, and to explore the practical applications of the antennas in radar, communication, navigation and other systems.