Complementary metallo-dielectric electromagnetic band gap structures

The concept of complementary electromagnetic band-gap structures employing dipole elements as conductors and apertures is presented for the first time. An efficient numerical method based in method of moments (MoM) is used to simulate and predict the surface response of the complementary array. Conductor and aperture dipoles are placed in close proximity with a rotation of 90° between them, in order to produce maximum coupling, which proves to yield maximum miniaturisation in the order of 2.3:1. Dispersion curves have been produced to study the modes supported by the array. Simulated and measured surface wave responses are presented for finite size structures, excited by a transmission line. A substantial decrease of the stop band frequency is observed, as the width of the conducting elements is increased.