Negative refractive index metamaterials supporting 2-D waves

Abstract

in Figure 13, where the voltage at the output of the structure is almost identical to the input voltage, with the difference resulting from slight deviations of the lumped-element parameters from their ideal values given by the relations in Eqs. (10a)-(10c). It can also be seen that the maximum voltage is located at the interface of the MNG and ENG structures, where resonance is generated. As one moves in opposite directions away from the interface, the voltage decreases uniformly. CONCLUSIONThe transparency in a CRLH-TL structure based on the ENG-MNG pair has been presented. The simulated and measured data demonstrate the transparency phenomenon in a conjugate matched pair of ENG and MNG structures. A circuit simulation of the voltage distribution along the structure has been presented in order to demonstrate the transparency of the structure. The stopband of a CRLH-TL has been shown to exhibit either ENG or MNG behavior, depending on the equivalent lumped-element parameters. OUT-OF-BAND IMPROVEMENT OF A SWITCHABLE NARROW BANDPASS FILTER

Triple-Band Composite Right/Left Handed Bandpass Filter Using a New Circular Inter-Digital Capacitor for Wireless Applications

“…As the gap between the fingers of C-IDC increases, C L decreases, which shifts ZOR frequency to a higher value. This can be evaluated as, for short ended, ZOR input impedance 14) where N is the number of unit cells, and l is the length of designed filter (l = N · d). Eq.…”

“…Left-handed (LH) material was first investigated theoretically in 1968 by Russian physicist Viktor Veselago [12]. The transmission line (TL) approach of LH materials was presented by cascading the series capacitors and shunt inductances to support a medium with negative refractive index [13,14]. LH material shows backward-wave propagation by forming a left-handed triplet among the propagated magnetic field, electric field and wave number vector.…”

Compact CPW Metamaterial Resonators for High Performance Filters

“…Several applications of TL-based metamaterials have been proposed and experimentally validated. For more information, the inclined reader is referred to (Caloz et al, 2002, Iyer & Eleftheriades, 2002, Oliner, 2002. …”

Automated synthesis of transmission lines loaded with complementary split ring resonators (CSRRs) and open complementary split ring resonators (OCSRRs) through aggressive space mapping (ASM)

“…This is due to the presence of the loading elements and their interaction with the host line. There are two main approaches for the implementation of metamaterial transmission lines: (i) the CL-loaded approach, where a host line is loaded with series capacitances and shunt inductances [15][16][17], and (ii) the resonant-type approach, where the host line is loaded with electrically small resonant elements, typically (although not exclusively) split ring resonators (SRRs) or complementary split ring resonators (CSRRs), and additional reactive elements [18,19]. This work is focused on the second approach, specifically on the automated synthesis of metamaterial transmission lines based on CSRRs.…”