Resonant artificial structures to achieve extraordinary transmission at microwaves

In this contribution, the role of artificial resonant structures in increasing the transmission through sub-wavelength apertures is discussed. Those devices are capable to enhance the aperture equivalent electric and magnetic dipole moments and, consequently, the overall power transmission. The design details are given and the enhancement performances are then illustrated through the use of full-wave simulations. Such structures may find applications in different fields, such as high-resolution spatial filters, ultra-diffractive imaging systems, etc.