Characterization of Tunable Metamaterial Elements Using MEMS Switches

Hand, Thomas H.; Cummer, Steven A.

doi:10.1109/lawp.2007.902807

Cited by 88 publications

(61 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There has been considerable effort to achieve this not just by the MPA community, but by the metamaterial community as a whole. The fi eld of active metamaterials has made important developments in the past few years with tunable designs available with MEMS, [ 168 ] liquid crystals, [ 169 ] and the inclusion of elements such as Schottky gates. [ 170 ] There have been a few attempts at a tunable MPA noted in Section 4 (e.g.…”

Section: Future Outlookmentioning

confidence: 99%

Metamaterial Electromagnetic Wave Absorbers

2012

View full text Add to dashboard Cite

The advent of negative index materials has spawned extensive research into metamaterials over the past decade. Metamaterials are attractive not only for their exotic electromagnetic properties, but also their promise for applications. A particular branch–the metamaterial perfect absorber (MPA)–has garnered interest due to the fact that it can achieve unity absorptivity of electromagnetic waves. Since its first experimental demonstration in 2008, the MPA has progressed significantly with designs shown across the electromagnetic spectrum, from microwave to optical. In this Progress Report we give an overview of the field and discuss a selection of examples and related applications. The ability of the MPA to exhibit extreme performance flexibility will be discussed and the theory underlying their operation and limitations will be established. Insight is given into what we can expect from this rapidly expanding field and future challenges will be addressed.

show abstract

Section: Future Outlookmentioning

confidence: 99%

Metamaterial Electromagnetic Wave Absorbers

2012

View full text Add to dashboard Cite

show abstract

“…(16) can be substituted into Eq. (14) to determine the Q of the transistor-embedded SRR equivalent circuit at resonance (Eq. (17)).…”

Section: Analysis Simulation and Measurement Of A Srr With Tunable Qmentioning

confidence: 99%

“…To overcome the narrow bandwidth limitation, tunable RF metamaterials have been created by embedding diodes [12,13], MEMS switches [14], and ferromagnetic elements [15,16]. These are all passive components and are used to tune the value of the resonant frequency, with varying degrees of continuity.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth Tuning in Transistor Embedded Metamaterials Using Variable Resistance

Barrett¹,

Katko²,

Cummer³

2016

PIER

View full text Add to dashboard Cite

Abstract-Metamaterials have been previously loaded with diodes and other types of passive circuit elements. Transistors offer an alternative to these established loading elements to expand the possible capabilities of metamaterials. With embedded transistors, additional degrees of freedom are achieved and lay out the architecture for more complex electromagnetic metamaterial design. A mathematical analysis of transistor loaded SRR unit cells is described in which the transistor acts as a variable resistor. From the mathematical analysis, we calculate transmission coefficients for a single unit cell. We then experimentally measure two SRRs with tunable quality factors and thus tunable bandwidth based upon modulating the effective loading circuit resistance to confirm the calculations. From the agreement between the calculated and measured transmission coefficients, we expand the analysis to show that a slab of more densely packed unit cells can achieve negative permeability with varying degrees of dispersion.

show abstract

“…When the size of the object is comparable to the wavelength, a perfect mantle cloak can be designed by using equation (13). Figure 16 shows the variation of the total SCS with the surface reactance of a mantle cloak, which is covered on the surface of a sphere with permittivity e = 10 and diameter 2a = k 0 /5, and for different frequencies of operation.…”

Section: Mantle Cloak: Invisibility Induced By a Surfacementioning

confidence: 99%

“…At present, it has been widely accepted that metamaterials may contain all artificial composite materials with periodic/aperiodic structures and have fantastic EM properties, including gradient refractive index material [8], zero-index material [9][10][11], the left/right handed composite transmission line material [12], EMparameter-tunable materials [13], etc. From this point of view, metamaterials, in a broad sense, also cover the well-developed artificial structures, such as photonic crystals [14], EM bandgap materials [15], and frequency selective surfaces [16].…”

Section: Introductionmentioning

confidence: 99%

Manipulating scattering features by metamaterials

Mei

Tang

et al. 2016

EPJ Applied Metamaterials

View full text Add to dashboard Cite

-We present a review on manipulations of electromagnetic scattering features by using metamaterials or metasurfaces. Several approaches in controlling the scattered fields of objects are presented, including invisibility cloaks and radar illusions based on transformation optics, carpet cloak using gradient metamaterials, dc cloaks, mantle cloaks based on scattering cancellation, ''skin'' cloaks using phase compensation, scattering controls with coding/ programmable metasurfaces, and scattering reductions by multilayered structures. Finally, the future development of metamaterials on scattering manipulation is predicted.

show abstract

Characterization of Tunable Metamaterial Elements Using MEMS Switches

Cited by 88 publications

References 11 publications

Metamaterial Electromagnetic Wave Absorbers

Metamaterial Electromagnetic Wave Absorbers

Bandwidth Tuning in Transistor Embedded Metamaterials Using Variable Resistance

Manipulating scattering features by metamaterials

Contact Info

Product

Resources

About