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This paper presents the fundamental concept and formulation of short-open calibration (SOC) technique in 2.5D method of moments (MoM), and its application in commercial software. By de-embedding the port discontinuities and feeding network, the guided-wave characteristics of periodic planar transmission line structures, such as microstrip line, coplanar-waveguide electromagnetic band-gap, and metamaterial...
Optical modulation characterisitics of graphene-hybridized plasmonic metamaterials is investigated. It is revealed that resonance peak transmission can be effectively tuned by the applied gate voltage, suggesting an electro-absorption modulation (EAM) mechanism.
A zero index metamaterial lens (ZIML) is proposed in this paper for antenna directivity and gain enhancement. The zero index metamaterial (ZIM) is constructed from both electric metamaterial with near-zero permittivity and magnetic metamaterial-modified split ring resonator (MSRR)-with near-zero permeability. The ZIM unit cell is numerically simulated in CST MWS. The scattering parameters show that...
We propose an effective way to reduce losses of the magnetic metamaterial by suppressing radiation losses. The numerical simulations unveil that the losses reduction of the magnetic metamaterial is achieved by placing a split ring resonator (SRR), twisted at an angle of with respect to the existing SRR owing to suppression of the radiation damping caused by residual currents...
This paper aims to give unified characterization of coplanar-waveguide-based 1D electromagnetic-bandgap (EBG) and metamaterial in terms of two fundamental per-unit-length (PUL) transmission parameters, i.e., characteristic impedance and propagation constant. In analysis, a full-wave self-calibrated method of moments (MoM) is applied to de-embedding these two PUL parameters from simulation of two-port...
This paper aims to give a unified characterization of various periodically loaded transmission line media/materials with infinite extent on coplanar waveguide (CPW) in terms of two fundamental per-unit-length (PUL) transmission parameters, i.e., frequency-dispersive/complex characteristic impedance and propagation constant. Regardless of varied periodic loading elements, a self-calibrated method of...
Transmission line metamaterials on CPW with unsymmetrical unit cells, loaded by series- C and shunt-L elements, are studied to demonstrate the distinctive characteristics of incident and reflected guided-waves. Two sets of per-unit-length transmission parameters, i.e., propagation constant and Bloch-wave impedance, are numerically extracted using our self-calibrated method of moments and they are...
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