Periodic metamaterials combining ferromagnetic nanowires and dielectric structures for planar circuits applications

This paper presents RF applications of metamaterials combining ferromagnetic and dielectric structures for planar devices. Materials under scope are periodic dielectric substrates including ferromagnetic inclusions or not with planar metallic patterns, forming microstrip photonic band-gap (PBG) structures. These topologies are modeled, fabricated, and measured in order to design planar sensors and filters up to millimeter wave frequencies. In addition, defect modes that make the spectral properties of the PBG devices more attractive for narrow bandpass filters and high Q resonators are also investigated. A theoretical explanation of defect modes operation in a magnetic PBG structure is proposed.