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Design and Implementation of Double Negative Metamaterial using Post Coupled Waveguide Resonator

Amit Patel, Yogeshwarprasad Kosta, Falguni Raval

Abstract


Metamaterial properties like permittivity and permeability are derived from its geometrical structure and material used. Double negative Metamaterial (DNGM) properties introduce both permittivity and permeability is negative at some resonance frequency of spectra. Introducing posts inside waveguide in our proposed structure generates DNGM at desired resonance at X band, Ku band and Ka band Frequencies are reported, which gives narrowband characteristic of metamaterial (MTM), better quality factor and very low insertion loss with good coupling factor. Simulations results demonstrate the realization of DNGMs matched to free-space as well as having superior insertion loss and better return loss. Post coupled waveguide resonator can be utilized for modern diagnostics of fusion plasma research, sensors, Global positioning system (GPS) as well as Broadcasting system. This post coupled waveguide resonator characteristic (transmission and reflection) can be widely varied by changing the geometrical structure and conductive properties of the inserted posts. Simulations are performed in HFSS (high frequency structure simulator) to demonstrate the characteristics of this resonator using a standard X-band (8-12 GHz) rectangular waveguide with center frequency at 11.2GHz. Furthermore, presented topologies are sensitive to parameters variation.


Keywords


DNGM (Double Negative Metamaterial), Post Coupled Waveguide Resonator, Refractive Index, Insertion Loss Quality Factor, LHM (Left Hand Material).

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