Reducing mutual coupling in chipless rfid tags composed of U-folded dipole scatterers

We propose a novel chipless RFID tag composed of topologically modified uniplanar U-folded dipoles with inclined arms. This topology reduces the interelement mutual coupling and provides a significantly better amplitude uniformity and frequency stability of tag RCS response when logical “0” is coded by removing particular scatterers from the array. Simultaneously, it provides a higher encoding capacity in unit frequency range than the arrays composed of original U-folded dipoles with parallel arms, yet at the expense of small RCS magnitude reduction.VC 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2723–2725, 2016; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.30138