METAMATERIAL-BASED COMPACT MULTILAYER FILTER WITH SKEW-SYMMETRIC FEEDS.

Split ring resonator (SRR) metamaterials are introduced to the design of a multilayer filter. Considering the electrical coupling to the magnetic resonance, careful examination of SRR orientations to the external stimulation is presented through a full wave analysis. With the skew-symmetric feed scheme, the compact multilayer filter has a center frequency of 6.07 GHz and 7 percent fractional bandwidth with two transmission zeros at 5.79 and 7.1 GHz. Compared with the conventional microstrip filter, the pro posed filter shows a significant size reduction and improved selectivity. [ABSTRACT FROM AUTHOR]