A co-polarization-insensitive metamaterial absorber for 5G n78 mobile devices at 3.5 GHz to reduce the specific absorption rate

Hannan, Saif; Islam, Mohammad Tariqul; Soliman, Mohamed S.; Faruque, Mohammad Rashed Iqbal; Misran, Norbahiah; Islam, Md. Shabiul

doi:10.1038/s41598-022-15221-7

Cited by 22 publications

(5 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fractal-based MMA in [ 57 ] shows absorption peaks at a 3.5 GHz frequency with an EMR of 9.96. Additionally, the proposed MMA achieved a higher EMR value than [ 49 , 58 , 59 , 61 ] and multiple absorption frequency bands, which make the proposed one preferable over existing MMAs in the range of sub-6 GHz frequency for 5G applications.…”

Section: Measurementmentioning

confidence: 99%

“…The designed MMA can be applicable in the field of 5G sub-6 GHz antenna design, such as the mutual coupling reduction in MIMO antenna elements, by placing the MMA horizontally between two antennae [ 55 , 56 ] or vertically [ 57 ], RCS reduction, and EMI shielding [ 49 ], SAR reduction [ 58 , 59 ], IoT applications [ 60 ], microwave range sensing [ 61 ] etc. The existing sub 6-GHz MMA in [ 55 , 56 ] achieved a single frequency at 5.5 GHz and 5.1 GHz frequency with EMR values of 6.05 and 12, respectively.…”

Section: Measurementmentioning

confidence: 99%

See 1 more Smart Citation

Triple-Band Square Split-Ring Resonator Metamaterial Absorber Design with High Effective Medium Ratio for 5G Sub-6 GHz Applications

et al. 2023

Self Cite

View full text Add to dashboard Cite

This article proposes a square split-ring resonator (SSRR) metamaterial absorber (MMA) for sub-6 GHz application. The unit cell of the MMA was designed and fabricated on commercially available low-cost FR-4 substrate material with a dielectric constant o 4.3. The higher effective medium ratio (EMR) of the designed unit cell shows the compactness of the MMA. The dimension of the unit cell is 9.5 × 9.5 × 1.6 mm3, which consists of two split rings and two arms with outer SSRR. The proposed MMA operates at 2.5 GHz, 4.9 GHz, and 6 GHz frequency bands with a 90% absorption peak and shows a single negative metamaterial property. The E-field, H-field, and surface current are also explored in support of absorption analysis. Moreover, the equivalent circuit model of the proposed MMA is modelled and simulated to validate the resonance behavior of the MMA structure. Finally, the proposed MMA can be used for the specific frequency bands of 5G applications such as signal absorption, crowdsensing, SAR reduction, etc.

show abstract

Section: Measurementmentioning

confidence: 99%

Section: Measurementmentioning

confidence: 99%

Triple-Band Square Split-Ring Resonator Metamaterial Absorber Design with High Effective Medium Ratio for 5G Sub-6 GHz Applications

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…The widespread use of mobile phones, especially by university students, who are characterized as heavy users (Kim et al, 2021;Loleska & Pop-Jordanova, 2021), the inconclusive verdict from the scientific community on the danger, or not, of electromagnetic radiation in the radio frequency range, and the growing interest of users, especially after the advent of the new 5G technology of mobile networks to the general public, led us to write this paper (Hannan et al, 2022). The research questions of this study can be summarized as follows:…”

Section: Research Questionsmentioning

confidence: 99%

Research for self-reported health problems after excessive talking time on mobile phones among university students

Gavrilas

Kotsis

2023

Eurasian Journal of Science and Environmental Education

View full text Add to dashboard Cite

The devices that people use every day, such as mobile phones and wireless networks, emit electromagnetic waves in the radio frequency range. The widespread use of these devices, as well as the change in people’s social behavior, have dramatically increased their exposure to electromagnetic radiation. Due to the rapid increase of young people users, public health officials and the scientific community are showing particular interest in the possible effects of electromagnetic radiation on human health. Many researchers express strong concerns about the effects of exposure to electromagnetic radiation, as it can have a serious impact on physical, cognitive, and social health. This study focused on self-reported health problems after excessive talking time on mobile phones of 619 (n=619) University students of both genders, in the age group of 18-24 years were randomly selected. The data was collected using a close-ended questionnaire. Headache was found to be the most frequently reported symptom (69%) followed by pressure in the head (38.8%). In most self-reported health problems no correlation was found between the genders. Female students tend to talk more on their mobile phones, and it was found that this extensive use was associated with the declaration of more self-reported health problems. The results of this study do not leave us any room for complacency, especially when we talk about health issues, and continuous research is needed to protect people’s health. In addition, modern education should provide the necessary knowledge to students, but also take care of the development of the critical thinking of future citizens, so that they can make the most appropriate decisions for their health.

show abstract

“…Some metamaterial absorbers have been proposed with a rotational symmetric patch structure to enable cross-polarization insensitivity, along with the conventional co-polarization absorption of the incident waves at resonance frequencies [ 28 ]. Along with its many other applications, SAR reduction from the next generation mobile phones is a recent application of frequency-targeted metamaterial absorbers [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Focusing on the Development and Current Status of Metamaterial Absorber by Bibliometric Analysis

Li¹,

et al. 2023

Materials

View full text Add to dashboard Cite

In this paper, a total of 4770 effective documents about metamaterial absorbers were retrieved from the Web of Science Core Collection database. We scientifically analyzed the co-occurrence network of co-citation analysis by author, country/region, institutional, document, keywords co-occurrence, and the timeline of the clusters in the field of metamaterial absorber. Landy N. I.’s, with his cooperator et al., first experiment demonstrated a perfect metamaterial absorber microwave to absorb all incidents of radiation. From then on, a single-band absorber, dual-band absorber, triple-band absorber, multi-band absorber and broad-band absorber have been proposed and investigated widely. By integrating graphene and vanadium dioxide to the metamaterial absorber, the frequency-agile functionality can be realized. Tunable absorption will be very important in the future, especially metamaterial absorbers based on all-silicon. This paper provides a new research method to study and evaluate the performance of metamaterial absorbers. It can also help new researchers in the field of metamaterial absorbers to achieve the development of research content and to understand the recent progress.

show abstract

A co-polarization-insensitive metamaterial absorber for 5G n78 mobile devices at 3.5 GHz to reduce the specific absorption rate

Cited by 22 publications

References 31 publications

Triple-Band Square Split-Ring Resonator Metamaterial Absorber Design with High Effective Medium Ratio for 5G Sub-6 GHz Applications

Triple-Band Square Split-Ring Resonator Metamaterial Absorber Design with High Effective Medium Ratio for 5G Sub-6 GHz Applications

Research for self-reported health problems after excessive talking time on mobile phones among university students

Focusing on the Development and Current Status of Metamaterial Absorber by Bibliometric Analysis

Contact Info

Product

Resources

About