Tunable metamaterial transmission lines based on varactor-loaded split-ring resonators

2006 ◽  
Vol 54 (6) ◽  
pp. 2665-2674 ◽  
Author(s):  
I. Gil ◽  
J. Bonache ◽  
J. Garcia-Garcia ◽  
F. Martin
Keyword(s):  
Transmission Lines ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Tunable Metamaterial

Flexible Metamaterials RF Filters Implemented through Micromachining LCP Substrates

2011 ◽  
Vol 2011 (DPC) ◽  
pp. 000555-000579
Author(s):  
Jonathan Richard ◽  
Robert Dean
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Flexible Substrate ◽  
Ring Resonators ◽  
Split Ring ◽  
Pass Filter ◽  
Split Ring Resonators ◽  
Wide Range ◽  
In Series ◽  
Invisibility Cloaks

Metamaterials have a wide range of potential uses in areas such as optics, transmission lines, and RF design. The simplest metamaterial structures are Split-Ring Resonators (SRR) and Complementary Split-Ring Resonators (CSSR). Through the combination of various forms of these structures, different applications in the areas previously stated can be achieved. Under this investigation, a metamaterials transmission line was realized through micromachining a Liquid Crystal Polymer (LCP) substrate. Not only does LCP possess useful RF properties, it can also be easily micromachined. This transmission line consisted of several CSSRs in series, which performed as a high-order, high-frequency high-pass filter. This structure was unique to most metamaterial structures because LCP is a flexible substrate. It was observed that the resonant frequency of the filter did not change when the LCP transmission line was flexed in various ways. Next, micromachined vias were etched through the LCP substrate to demonstrate that these features do not affect the filter's response. Through utilization of these vias, the metamaterial structures can be physically conformed to nearly any shape or mounted onto another object without affecting the filter's response. As demonstrated in a simple filter structure, the shape manipulation has very little effect. Theoretically, extrapolating these methods to the development of metamaterials 3D RF invisibility cloaks, that are easily realizable and mountable onto an object, could prove useful.

A compact tunable metamaterial filter based on split-ring resonators

2017 ◽  
Vol 13 (2) ◽  
pp. 120-122 ◽  
Author(s):  
Ya-juan Zhao ◽  
Bi-cheng Zhou ◽  
Ze-kui Zhang ◽  
Rong Zhang ◽  
Bao-yi Li
Keyword(s):  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Tunable Metamaterial

scholarly journals Tunable Metamaterial with Gold and Graphene Split-Ring Resonators and Plasmonically Induced Transparency

Nanomaterials ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 7 ◽  
Author(s):  
Qichang Ma ◽  
Youwei Zhan ◽  
Weiyi Hong
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Transparency Window ◽  
Ring Resonators ◽  
Metamaterial Structure ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Electrostatic Gating ◽  
Tunable Metamaterial ◽  
Induced Transparency ◽  
Plasmonically Induced Transparency

In this paper, we propose a metamaterial structure for realizing the electromagnetically induced transparency effect in the MIR region, which consists of a gold split-ring and a graphene split-ring. The simulated results indicate that a single tunable transparency window can be realized in the structure due to the hybridization between the two rings. The transparency window can be tuned individually by the coupling distance and/or the Fermi level of the graphene split-ring via electrostatic gating. These results could find significant applications in nanoscale light control and functional devices operating such as sensors and modulators.

Testing of Flexible Metamaterial RF Filters Implemented through Micromachining LCP Substrates

2012 ◽  
Vol 2012 (DPC) ◽  
pp. 001115-001138
Author(s):  
Robert Dean ◽  
Jonathan Richard
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Flexible Substrate ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Planar Surfaces ◽  
Rf Design ◽  
Wide Range ◽  
In Series

Metamaterials have a wide range of potential uses in areas such as optics, transmission lines, and RF design. The simplest metamaterial structures are Split-Ring Resonators (SRR) and Complementary Split-Ring Resonators (CSSR). Through the combination of various forms of these structures, different applications in the areas previously stated can be achieved. Under this investigation, a metamaterials transmission line was realized through micromachining a Liquid Crystal Polymer (LCP) substrate. Not only does LCP possess useful RF properties, it is flexible and micromachinable. This transmission line consisted of several CSSRs in series, which performed as a high-order, high-frequency filter. This structure was unique to most metamaterial structures because LCP is a flexible substrate. Prototype filters were fabricated and evaluated. One test involved flexing the devices over various radii of PVC pipe sections to evaluate the effects of flexing the substrate on the filter's performance. The filter properties were shown to maintain approximately the same frequency and roll-off while being bent over the various radii of curvature. Therefore, arrays of these filters could be fabricated with planar processes and attached to non-planar surfaces, such as airfoils, for uses such as radar cloaking.

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