Active Reconfigurable Metamaterial Unit Cell Based on Non-Foster Elements

Hrabar, Silvio; Krois, Igor; Bonic, Ivan; Kiricenko, Aleksandar; Muha, Damir

doi:10.21236/ada591562

Cited by 8 publications

(12 citation statements)

References 66 publications

(118 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This happened due to capacitive coupling between neighboring dipoles that cannot be compensated by non-Foster elements (a very similar effect, but within a different context, was discussed in [32]). Several similar designs of volumetric 3D metamaterials with negative elements were proposed theoretically in [33]. No experimental realization of a volumetric 3D non-Foster-based metamaterial structure has been published so far.…”

Section: Active Metamaterials and Metamaterial-inspired Devicesmentioning

confidence: 99%

First ten years of active metamaterial structures with “negative” elements

Hrabar

2018

EPJ Appl. Metamat.

Self Cite

View full text Add to dashboard Cite

Almost ten years have passed since the first experimental attempts of enhancing functionality of radiofrequency metamaterials by embedding active circuits that mimic behavior of hypothetical negative capacitors, negative inductors and negative resistors. While negative capacitors and negative inductors can compensate for dispersive behavior of ordinary passive metamaterials and provide wide operational bandwidth, negative resistors can compensate for inherent losses. Here, the evolution of aforementioned research field, together with the most important theoretical and experimental results is reviewed. In addition, some very recent efforts that go beyond idealistic impedance negation and make use of inherent non-ideality, instability, and non-linearity of realistic devices, are highlighted. Finally, a very fundamental, but still unsolved issue of common theoretical framework that connects causality, stability, and non-linearity of networks with negative elements is stressed.

show abstract

Section: Active Metamaterials and Metamaterial-inspired Devicesmentioning

confidence: 99%

First ten years of active metamaterial structures with “negative” elements

Hrabar

2018

EPJ Appl. Metamat.

Self Cite

View full text Add to dashboard Cite

show abstract

“…This issue is associated with the basic physics of reactive energy stored within a material. Very recently, it has been shown that, in some cases, it is possible to go around the basic dispersion constrains by the use of non-Foster active elements such as negative capacitors and negative inductors [4][5][6][7][8][9][10][11]. NonFoster elements have dispersion curves that are the exact inverse of the dispersion curves of ordinary 'positive' elements, so they enable compensation of the inherent dispersion, resulting in broadband behavior [4][5][6][7][8][9][10][11].…”

Section: Metamaterialsmentioning

confidence: 99%

“…The unit cell of a 2D ENZ MTM in [5] showed fairly constant ENZ behavior within one octave (1GHz -2GHz). In the subsequent studies [8,9] a complete 1D active RF ENZ metamaterial, based on ultra-fast OPAMPs was analyzed, built and tested. Measurements revealed almost dispersionless ENZ behavior in the frequency range from 2 MHz to 40 MHz (four octaves).…”

Section: Metamaterialsmentioning

confidence: 99%

See 1 more Smart Citation

New research directions in broadband active non-Foster RF metamaterials

Hrabar

Krois

Kiricenko

et al. 2012

2012 6th European Conference on Antennas and Propagation (EUCAP)

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, due to their active nature they are not unconditionally stable. The stability-factor as determined by the input reflection coefficient of an NIC loaded circuit has been proven to be insufficient for evaluating stability of NIC networks [16,17].…”

Section: Nic Networkmentioning

confidence: 99%

Loading artificial magnetic conductor and artificial magnetic conductor absorber with negative impedance convertor elements

Ding

Fusco

2012

Micro & Optical Tech Letters

View full text Add to dashboard Cite

The general properties of a frequency selective surface loaded with negative impedance converter (NIC)-based active loads are discussed from a theoretical perspective. The stability problem associated with NIC circuits embedded in artificial magnetic conductor (AMC) and AMC absorber applications is studied using pole-zero analysis. The requirements and constraints for achieving stable operation with enhanced bandwidth using negative capacitance as realized by a floating NIC network are derived. Furthermore, it is shown that it is nearly impossible to simultaneously implement a negative capacitor and a negative inductor to such structures. Figure 1The structure of FSS-based AMC and its equivalent circuit for one unit cell ABSTRACT: This article presents structure and bias optimization techniques for the radio frequency (RF) stability of silicon nanowire transistor. The RF parameters are extracted using device simulation. The device stability is obtained for various bias conditions and geometry, and observed that the proposed device structure shows good stability response.

show abstract

Active Reconfigurable Metamaterial Unit Cell Based on Non-Foster Elements

Cited by 8 publications

References 66 publications

First ten years of active metamaterial structures with “negative” elements

First ten years of active metamaterial structures with “negative” elements

New research directions in broadband active non-Foster RF metamaterials

Loading artificial magnetic conductor and artificial magnetic conductor absorber with negative impedance convertor elements

Contact Info

Product

Resources

About