Active Surface Cloaking with Patch Antennas

摘要

Active interior electromagnetic cloaking cancels an object's scattering through the use of an array of active sources placed along its boundary. Unlike previous passive methods, conventional antennas can be used and cloaking achieved regardless of the object's geometry and material composition. The work in this paper continues upon expanding the potential of active methods in the development of a practically realizable cloak. Here, a thin conformal cloak is constructed out of 20 planar folded patch antennas to hide a metallic circular cylindrical target at 2.5 GHz. The performance of this cloak is then demonstrated through full-wave electromagnetic simulations. By weighting the input voltages on each patch, the cylinder's radar cross-section is reduced by -15 dBsm in all directions.