Article
Materials Science, Multidisciplinary
Khalid Majeed, Shahab Ahmad Niazi, O. Altintas, M. A. Baqir, M. Karaslaan, Ugur Cem Hasar
Summary: In this study, a single-layered cartwheel-shaped metamaterial absorber operating in the microwave band is proposed. The absorber shows good angular stability and high absorptivity at multiple resonance peaks. Its absorption characteristics can be tuned by modifying the substrate thickness.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Laxmikant Dewangan, Nipun Kumar Mishra
Summary: In this paper, a polarization-insensitive metamaterial absorber is investigated for radar cross-section reduction at X, Ku, and K bands. The absorber consists of a symmetrically arranged defective L-shaped patch on a metal-backed FR-4 substrate. It exhibits multiband absorption response at distinct frequencies and is insensitive to polarization and wide incidence angles.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Amirhossein Norouzi-Razani, Pejman Rezaei
Summary: In this paper, a multi-band metamaterial perfect absorber based on the heterogeneous structure of graphene with Cu and SiO2 substrates is presented and investigated. The absorber achieves high absorption rates at different frequencies and is not sensitive to polarization, making it suitable for various applications.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Optics
Sarvesh K. Dubey, Awadhesh Kumar, Govind Dayal, Amit Pathak, S. K. Srivastava
Summary: This paper proposes a design of polarization-insensitive, broadband electromagnetic wave absorber in the long-wave infrared region using metamaterials. The numerical results show that the proposed design has high absorption rates over a wide range of incidence angles and polarizations, and it can completely absorb electromagnetic waves at specific wavelengths. This design has great potential for applications in energy harvesting and optoelectronics.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Shihabun Sakib, Ahasanul Hoque, Sharul Kamal Bin Abdul Rahim, Mandeep Singh, Norsuzlin Mohd Sahar, Md. Shabiul Islam, Mohamed S. Soliman, Mohammad Tariqul Islam
Summary: This paper presents a central spiral split-rectangular-shaped metamaterial absorber surrounded by a polarization-insensitive ring resonator for s-band applications. The absorber achieves a rated absorption of 99.9% at 3.1 GHz with a three-layer structure using copper and FR-4 substrate. The unit cell acts as an epsilon negative (ENG) metamaterial absorber with negative permittivity and positive permeability at 3.1 GHz.
Article
Materials Science, Multidisciplinary
Prince Jain, Himanshu Chhabra, Urvashi Chauhan, Dhiraj Kumar Singh, Twana Mohammed Kak Anwer, Shaik Hasane Ahammad, Md Amzad Hossain, Ahmed Nabih Zaki Rashed
Summary: This article presents a machine learning-based multiband metamaterial absorber (MMA) for terahertz applications that considerably reduces simulation time while ensuring accuracy. The absorption peaks and coefficients of the designed MMA at multiple frequencies are provided. The study also investigates the impact of altering the geometric features of the MMA on absorption, and proposes the use of a regression model for accurately predicting absorption coefficients.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
I Hossain, M. Samsuzzaman, M. S. J. Singh, B. B. Bais, M. T. Islam
Summary: The study introduces a nanostructured multiband metamaterial absorber with polarization insensitivity and wide angular stability for optical applications, suitable for magnetic resonance imaging (MRI), color images, thermal imaging, and solar cell exploitation in the terahertz (THz) frequency regime.
DIGEST JOURNAL OF NANOMATERIALS AND BIOSTRUCTURES
(2021)
Article
Optics
Dac Tuyen Le, Ba Tuan Tong, Thi Kim Thu Nguyen, Thanh Nghia Cao, Hong Quang Nguyen, Manh Cuong Tran, Chi Lam Truong, Xuan Khuyen Bui, Dinh Lam Vu, Thi Quynh Hoa Nguyen
Summary: A three-layer structure metamaterial absorber was designed for polarization-insensitive dual-band absorption in the THz region, achieving absorptivity greater than 96% at specific frequencies. The asymmetrical design structure eliminates polarization dependence and allows for tuning of absorption bands by varying the resonator dimensions.
Article
Materials Science, Multidisciplinary
Huihui Jing, Junping Duan, Yiqing Wei, Jingxian Hao, Zeng Qu, Jiayun Wang, Binzhen Zhang
Summary: In this study, a flexible microwave metamaterial absorber with ultra-broadband and polarization-insensitive characteristics is proposed, characterized, and fabricated. By utilizing a two-layer periodic indium-tin-oxide (ITO) patches array printed on polyethylene terephthalate (PET) dielectric layers, high ohmic loss is generated to achieve high broadband absorption. Simulation results demonstrate that the absorber can achieve absorption greater than 90% in the microwave frequency range of 19.68 to 94.7 GHz. The absorber exhibits polarization-insensitive properties due to the symmetry of its structure, allowing for high absorption over a wide incident angle of 60 degrees. The mechanism of ultra-broadband absorption is discussed through impedance matching theory, surface current distribution, and electric field distribution. Additionally, an equivalent circuit model is used to analyze the impact of structural parameters. The experimental measurements validate the simulated spectra using the bow-frame method. With its advantages of ultra-broadband absorption, polarization-insensitivity, and flexibility, the proposed absorber can find applications in energy harvesting, imaging and sensing, stealth technology, modulation, and more.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Engineering, Electrical & Electronic
Bahareh Khodadadi, Pejman Rezaei, Vahid Ghods, Majid Babaeinik
Summary: This article proposes and examines a polarization-insensitive broadband adjustable THz metamaterial absorber. The absorber is made up of a periodic array of patterned graphene elements, providing a wide bandwidth and high absorption rate. It exhibits polarization-independent characteristics and is suitable for various applications.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Chemistry, Physical
Kavitha Muthukrishnan, Venkateswaran Narasimhan
Summary: Terahertz metamaterial absorbers (MMA) have shown promising research prospects in the development of multiband absorbers, with applications in THz imaging, wireless communication, and bolometric detectors. By utilizing a GaAs substrate and a metallic pattern on a gold layer, this design achieved 9-band absorption in the THz spectral region. The absorption mechanism was studied using electric field dispersion analysis and impedance matching, demonstrating nine bands within a narrow frequency range and potential applications in hyperspectral imaging and clinical sensing.
Article
Materials Science, Multidisciplinary
R. M. H. Bilal, M. A. Baqir, A. Iftikhar, S. A. Naqvi, M. J. Mughal, M. M. Ali
Summary: This paper presents a multiband Yagi-Uda shaped metamaterial absorber (YUMA) that operates in X- and Ku-bands with functions of miniaturization, polarization controllability, and wide incidence angle stability. The YUMA exhibits three distinctive nearly perfect absorption peaks at frequencies of 10.64 GHz, 12.08 GHz, and 14.09 GHz. The proposed YUMA demonstrates multifunctional characteristics such as polarization controllability and wide incidence angle stability, making it a potential candidate for polarization detection systems and transmissive polarizers. The YUMA also has potential applications in air traffic control, weather monitoring, military radar, and satellite communication.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Physics, Condensed Matter
Amirhossein Norouzi-Razani, Pejman Rezaei
Summary: In this paper, a broadband metamaterial perfect absorber (MPA) based on graphene is proposed and investigated. The proposed absorber has high absorption rate and wide bandwidth with the use of gold and Rogers RT5880LZ as the conductive substrate and dielectric layer. This structure is not sensitive to polarization and suitable for various applications in the terahertz band.
MICRO AND NANOSTRUCTURES
(2022)
Article
Engineering, Electrical & Electronic
Ahmed S. Saadeldin, Amr M. Sayed, Adnan M. Amr, Menna O. Sayed, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: An ultrathin and broadband metamaterial absorber with loaded four lumped resistors is proposed and analyzed in this study. The absorptivity is increased by simultaneously reducing the reflection and transmission coefficients. The proposed design utilizes continuous metallic ground to achieve zero transmission and matches the impedance with free space to reduce reflection. It demonstrates electric and magnetic resonances with perfect absorptivity. The suggested absorber exhibits high absorption over a wide frequency range and incident angle variation, making it suitable for applications in communications, stealth, and imaging fields.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Physics, Applied
Ningfeng Bai, Fuxian Zhong, Jingxuan Shen, Hehong Fan, Xiaohan Sun
Summary: This paper proposes a thermal-insensitive ultra-broadband metamaterial absorber (MMA) based on ITO patterns and SiO2 dielectric substrate. The simulation results demonstrate significant achievements in stability and absorbability, making it suitable for high-temperature environments.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Prakash Ranjan, Chetan Barde, Arvind Choubey, Rashmi Sinha, Anubhav Jain, Komal Roy
Summary: This article presents a wideband Metamaterial Cross Polarizer (MCP) structure for C and X band applications, achieving a high Polarization Conversion Ratio (PCR) above 0.8 with a bandwidth of 8.1 GHz. The study demonstrates that the proposed anisotropic structure performs well under different incident angles, showing promising performance in C and X band applications.
Article
Engineering, Electrical & Electronic
Praveen Kumar, Rashmi Sinha, Arvind Choubey, Santosh Kumar Mahto
Summary: This paper discusses a miniaturized rectangular shape narrow band MIMO antenna with I-shaped slot DGS for isolation improvement. The DGS is etched between adjacent patches to limit surface waves. The proposed antenna has a reduced edge-to-edge spacing and a small size, and achieves low return loss over the operating band. The diversity performance of the design is validated through comparative analysis of multiple parameters.
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Praveen Kumar, Rashmi Sinha, Arvind Choubey, Santosh Kumar Mahto
Summary: The proposed low-profile MIMO antenna demonstrates significant reduction in mutual coupling between antenna elements through a simple isolation structure, showing excellent performance and potential for a wide range of applications.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Prakash Ranjan, Santosh Kumar Mahato, Arvind Choubey, Rashmi Sinha, Hernan Peraza-Vazquez, Chetan Barde, Adrian Pena-Delgado, Komal Roy
Summary: This paper proposes the synthesis of two wideband metamaterial cross-polarizers (MCPs) using the binary wind-driven optimization (BWDO) technique. The performance of the proposed MCPs is compared with previously reported MCPs, and the results show that the proposed MCPs achieve excellent wideband responses and polarization conversion ratios.
JOURNAL OF COMPUTATIONAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Pravesh Pal, Rashmi Sinha, Santosh Kumar Mahto
Summary: This paper presents a compact wideband circularly polarized planar filtenna based on filter synthesis methodology. The proposed filtenna achieves both compactness and high frequency selectivity through better integration between antenna and filter. It exhibits a wideband filtering response and a wide axial ratio bandwidth well suited for 5 GHz WLAN application.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Ranjeet Kumar, Rashmi Sinha, Arivnd Choubey, Santosh Kumar Mahto
Summary: This paper presents a compact and efficient circular monopole antenna that achieves communication in the 3.5 GHz band by etching special strips on the substrate, and it has excellent gain and radiation performance, suitable for WLAN/WiMAX applications.
Article
Engineering, Electrical & Electronic
Ajit Kumar Singh, Santosh Kumar Mahto, Rashmi Sinha
Summary: This paper proposes a compact I-shaped monopole radiator with a partial ground plane to achieve a wide impedance bandwidth. A four-element MIMO antenna configuration is designed to further expand the operational bandwidth. The use of a modified rectangular stub improves isolation between the antennas in the operating frequency range.
Article
Engineering, Electrical & Electronic
Praveen Kumar, Rashmi Sinha, Arvind Choubey, Santosh Kumar Mahto
Summary: This paper presents a wideband multiple-input multiple-output (MIMO) antenna for C-band applications. The antenna consists of hexagonal motifs and inverted L-shaped stubs, providing good impedance bandwidth and isolation. Experimental results demonstrate the feasibility of the proposed design.
Article
Engineering, Electrical & Electronic
Ranjeet Kumar, Rashmi Sinha, Arivnd Choubey, Santosh Kumar Mahto
Summary: This article introduces a newly designed circular monopole antenna, featuring miniaturized size and large bandwidth with high data rate. The antenna design includes hexagonal patches, rectangular slots, and modified loaded ground. It has been simulated using HFSS software and verified through experiments, with excellent agreement between the results. The antenna demonstrates outstanding performance.
Article
Engineering, Electrical & Electronic
Ajit Kumar Singh, Santosh Kumar Mahto, Praveen Kumar, Rashmi Sinha
Summary: This paper proposes a quad element multiple-input-multiple-output (MIMO) antenna with improved impedance bandwidth and isolation for terahertz applications. The antenna utilizes a defected ground structure (DGS) and orthogonal placement of the four elements to reduce mutual coupling and envelope correlation coefficient (ECC). The antenna demonstrates excellent diversity performance and radiation efficiency, making it suitable for various terahertz communication applications.
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Raj Kumar Mistri, Santosh Kumar Mahto, Rashmi Sinha
Summary: This paper proposes a dual-band eight-antenna MIMO system, and evaluates its performance through analysis of S-parameters, ECC, MEG, TARC, and CC. The experimental results demonstrate that the system exhibits good S-parameters, radiation pattern, and isolation characteristics.
INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS
(2023)
Review
Instruments & Instrumentation
Kunal Kumar Singh, Santosh Kumar Mahto, Rashmi Sinha
Summary: This paper focuses on the research conducted in the past decade on metamaterial-based sensors for material characterization. The study reviews research papers published in reputable journals and emphasizes the structure, size, and nature of the materials characterized. Metamaterial sensors have potential applications in the electromagnetic spectrum.
Article
Engineering, Electrical & Electronic
Raj Kumar Mistri, Ajit Kumar Singh, Santosh Kumar Mahto, Rashmi Sinha
Summary: In this paper, a multiple-input and multiple-output (MIMO) system with a size of 35 x 35 x 0.76 mm3 is proposed for 5G communication. The bandwidth and radiation properties of the antenna are enhanced by modifying the rectangular radiating patches with rectangular-shaped slots in the ground plane. The proposed MIMO antenna achieves an isolation of 21 dB. Various performance attributes of diversity, such as the mutual coupling coefficient, envelope correlation coefficient (ECC), total active reflection coefficient (TARC), diversity gain (DG), mean effective gain (MEG), and channel capacity loss (CCL), are investigated. The experimental results of the fabricated antenna show excellent performance compared to simulations.
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
(2023)
Article
Chemistry, Analytical
Ajit Kumar Singh, Santosh Kumar Mahto, Rashmi Sinha, Mohammad Alibakhshikenari, Ahmed Jamal Abdullah Al-Gburi, Ashfaq Ahmad, Lida Kouhalvandi, Bal S. Virdee, Mariana Dalarsson
Summary: This paper presents a printed reconfigurable multiband antenna design using a low-cost resin-coated commercial-photo-paper substrate. The proposed antenna utilizes two PIN diodes to redistribute the surface current, achieving reconfigurable properties. Parametric analysis is conducted to optimize the design parameters, and simulated and measured results confirm the effectiveness of the antenna design. The antenna operates in a wide frequency range, eliminating the need for numerous electronic components.
Proceedings Paper
Engineering, Electrical & Electronic
Ajit Kumar Singh, Santosh Kumar Mahto, Rashmi Sinha
Summary: This article proposes a design of a two-element MIMO antenna for sub-6 GHz 5G wireless access points. The antenna utilizes a microstrip fed circular shape and achieves optimized bandwidth and isolation through the use of E-shaped stubs and partial ground plane. Simulation and measurement results demonstrate the effectiveness of the proposed antenna design. The diversity performance of the MIMO antenna is also studied.
2022 IEEE MICROWAVES, ANTENNAS, AND PROPAGATION CONFERENCE, MAPCON
(2022)
