Realization of dual bandpass filters with metamaterials in three coupled finlines

Metamaterials in microwave field have been an object of great interest in recent past years. The hypothesis of V.G. Veselago in 1968, that materials with simultaneous negative effective permittivity epsiv_eff (omega) and negative effective permeability mu_eff (omega) have unusual reversed electromagnetic wave propagation phenomena. Subsequently many researchers have been working in this area for different orientations and applications. Modern communication transceivers require high performance microwave filters with low insertion loss, high frequency selectivity and small group delay variations. Most of the above said parameters are obtained with this proposed dual bandpass filter realized with three coupled finlines with metamaterials and this structure is suitable for millimeter wave components due to various advantages such as reducing size, weight and cost considerably.