Enhanced stability of microwave absorption in island-bridge structured organohydrogels.

Stretchable microwave absorbers (SMAs) are vital for flexible electronics. Traditional SMAs display unstable tensile properties resulting from inconsistencies between the constrained conductive layer and the flexible dielectric layer. This study introduces an organohydrogel-based stretchable microwave absorber (OSMA) that incorporates an organohydrogel within an island-bridge structure. Leveraging standing wave and field concentration effects, along with strain dissipation, the OMSA achieves 90% absorption in the 5-18 GHz range and maintains stable broadband absorption under a 30% uniaxial stretch, exhibiting tunable absorption and angular performance under transverse electric/magnetic (TE/TM) polarization. This approach offers a versatile, customizable, and cost-effective solution for SMAs.