Dual-polarized printed cylindrical metasurface cloak at microwave frequencies

A printed metasurface on a grounded, thin cylindrical-shell dielectric substrate is introduced, capable of concealing large objects under both transverse electric and magnetic polarizations. When a plane wave illuminates the cylinder, the metasurface effectively absorbs the incident power on the lit side by inducing surface waves, and transports it to the shadow side before reconstructing the incident wavefront and thereby achieving cloaking. For each polarization, the surface waves are built and meticulously optimized to meet local and global lossless and gainless conditions, ensuring a passive surface characterization. Retrieved from the optimized complete tangential fields, a spatially modulated tensor surface reactance is realized using an array of printed Jerusalem-cross-shaped conductor patterns. At a microwave frequency, a prototype cloak is designed, fabricated, and experimentally characterized for its scattering properties. Measurement results confirm the effectiveness of the cloaking approach and its printed metasurface realization.