Plasmonic Metamaterial Based Dual-Band Filter

This paper reports the design, analysis, and characterization of a dual-band filter using the concept of plasmonic metamaterial. The designed filter consists of a multi-mode butterfly shape resonator, which is directly coupled through plasmonic transmission line with coupling gap g. The operational mechanism of the filter has been explained through the even-odd mode analysis. The designed filter has dual-band response with the center frequencies of 1.78 GHz and 2.59 GHz. Measured insertion losses are ~1.5dB and return loss are better than 15dB for both the pass-bands. The proposed filter will pave an important role in the design and development of plasmonic circuits and systems.