An Ultra-Low Loss Split Ring Resonator by Suppressing the Electric Dipole Moment Approach

Zhu, Lei; Meng, Fanman; Zhang, Fang; Fu, Jiahui; Wu, Qun; Ding, Xumin; Li, Le‐Wei

doi:10.2528/pier12121703

Cited by 12 publications

(6 citation statements)

References 43 publications

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“…For this purpose, an ultra-low loss split-ring resonator (SRR) has been proposed [15]. This approach incorporates lumped/interdigital capacitors or a dielectric medium into the SRR (SRR- Figure 5.…”

Section: Discussionmentioning

confidence: 99%

Microwave Focusing Within Arbitrary Refractive Index Media Using Left-Handed Metamaterial Lenses

Leggio¹,

Dadrasnia²,

Varona³

2016

PIER M

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Abstract-Left-handed metamaterial (LHM) lenses allow the focusing of microwave radiation at specific positions within a medium, depending on its refractive index. A suitable approach needs to consider the reflections between the LHM lens and the adjacent media. This work faces the challenge of focusing the microwave radiation within a medium with arbitrary positive refractive index and characteristic impedance using LHM lenses as imaging-forming systems. To find a right lens formula a full wave method is presented in theory. The results we achieved show that the characteristic flat shape of conformal-four lens configuration has a spot size of 0.53 × 0.34λ 2 eff at −3 dB if the different media are perfectly matched. Otherwise, a noteworthy aberration affects the focusing, but it can be mitigated using a conformal circular LHM lens with a spot size of ∼ 0.4 × 0.4λ 2 eff at −3 dB.

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Section: Discussionmentioning

confidence: 99%

Microwave Focusing Within Arbitrary Refractive Index Media Using Left-Handed Metamaterial Lenses

Leggio¹,

Dadrasnia²,

Varona³

2016

PIER M

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“…This is a promising approach, in which zero-loss metamaterials can be predicted theoretically, even over a wide bandwidth. Nevertheless, it may not always be possible to find proper material to ensure the required gain at the desired frequency band [33]. It is common to assume that the metamaterials and the gain materials are independent [117], [118].…”

Section: Embedding the Gain Materials For Loss Compensationmentioning

confidence: 99%

“…In contrast, the dominant component of the losses, the radiation losses, are due to the incident wave being dispersed away by the metamaterial elements. If the surface current of the structure is not distributed uniformly, the electric dipole moment is induced, thereby exhibiting high radiation loss [33]. The low loss property and the broad bandwidth are the factors to be considered when designing device-based metamaterial at a high-frequency range, such as the millimeter-wave and terahertz spectra.…”

Section: Introductionmentioning

confidence: 99%

Overview of Approaches for Compensating Inherent Metamaterials Losses

et al. 2022

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Metamaterials are synthetic composite structures with extraordinary electromagnetic properties not readily accessible in ordinary materials. These media attracted massive attention due to their exotic characteristics. However, several issues have been encountered, such as the narrow bandwidth and inherent losses that restrict the spectrum and the variety of their applications. The losses have become the principal limiting factor when employing metamaterials in real-world applications. Consequently, overcoming them is crucially important and of practical necessity. This paper discusses the practical applications of metamaterials in constructing functional devices and the effects of the losses on such devices. In more depth, it reviews the available approaches for reducing the metamaterial losses developed over the last two decades in the light of available literature. These approaches include the utilization of the principles of electromagnetically induced transparency (EIT), geometric tailoring of the metamaterial structures, and embedding gain materials. Further, computational optimization techniques, such as particle swarm optimization (PSO) and genetic algorithm (GA), are also discussed to design low-loss metamaterials. The EIT-like metamaterial and the including of gain materials are systematic and universal approaches exhibiting low loss approaching zero. In contrast, the other two are not systematic and universal approaches.

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“…The antenna achieved ultrawide band properties with medium average peak gain of 3.6 dBi. Some antennas were proposed based on SRRs with metamaterials characteristics [ 14 – 16 ].…”

Section: Introductionmentioning

confidence: 99%

A Compact 5.5 GHz Band-Rejected UWB Antenna Using Complementary Split Ring Resonators

Islam

Faruque

Islam

2014

The Scientific World Journal

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A band-removal property employing microwave frequencies using complementary split ring resonators (CSRRs) is applied to design a compact UWB antenna wishing for the rejection of some frequency band, which is meanwhile exercised by the existing wireless applications. The reported antenna comprises optimization of a circular radiating patch, in which slotted complementary SRRs are implanted. It is printed on low dielectric FR4 substrate material fed by a partial ground plane and a microstrip line. Validated results exhibit that the reported antenna shows a wide bandwidth covering from 3.45 to more than 12 GHz, with a compact dimension of 22 × 26 mm2, and VSWR < 2, observing band elimination of 5.5 GHz WLAN band.

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An Ultra-Low Loss Split Ring Resonator by Suppressing the Electric Dipole Moment Approach

Cited by 12 publications

References 43 publications

Microwave Focusing Within Arbitrary Refractive Index Media Using Left-Handed Metamaterial Lenses

Microwave Focusing Within Arbitrary Refractive Index Media Using Left-Handed Metamaterial Lenses

Overview of Approaches for Compensating Inherent Metamaterials Losses

A Compact 5.5 GHz Band-Rejected UWB Antenna Using Complementary Split Ring Resonators

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