Editorial Material
Engineering, Electrical & Electronic
Sina Moradi, Babak Honarbakhsh, Thomas F. Eibert
Summary: The Total Active Reflection Coefficient (TARC) is a crucial parameter for characterizing antenna arrays. It can be defined differently depending on the specific problem, thus finding general estimates and bounds is significant.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Computer Science, Interdisciplinary Applications
Bilal Aghoutane, Mohammed El Ghzaoui, Sudipta Das, Wael Ali, Hanan El Faylali
Summary: This article presents the design and analysis of a new printed MIMO antenna for 28/38 GHz millimeter-wave 5G NR applications. The proposed antenna achieves high gain and wide bandwidth through a 2 x 2 configuration of identical patch elements. A novel technique for folding the feed line and applying a protruding ground is introduced to improve mutual coupling. The experimental results validate the simulation results and demonstrate the antenna's suitability for future mm-wave 5G MIMO systems and services.
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Vishal Sorathiya, Abdullah G. Alharbi, Sunil Lavadiya
Summary: This manuscript presents a superior 1 x 2 MIMO antenna structure, analyzing eight designs with varying shapes of patch elements and slits inserted in the ground regions. The structure has overall dimensions of 50 x 39 x 1.6 (mm³) and utilizes low-profile substrate FR4 for fabrication. The reflectance responses of simulated and measured designs are compared, showing wider isolation bands with the insertion of L-shaped slits in the ground region and engraving of the patch elements. The design achieves a minimum S-11 of x 67.53 dB, a broader bandwidth of 5.653 GHz, and a peak gain of 8.72 dBi. ECC, CCL, TARC, and DG are also analyzed.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Sina Moradi, Babak Honarbakhsh, Thomas F. Eibert
Summary: The total active reflection coefficient (TARC) is a key parameter in MIMO platforms. This article separates coupling and excitation effects and represents them using inequalities. The derived bounds are verified and compared numerically, and their effectiveness is demonstrated.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Telecommunications
Sanjay Chouhan, Leeladhar Malviya
Summary: This study introduces a wideband, multi-standard MIMO antenna designed for various applications, with a focus on real-time performance, high data transfer rates, low latency, and reliability. The antenna resonates at 2.1 GHz, with isolation exceeding 10 dB and a total bandwidth of 860 MHz.
WIRELESS PERSONAL COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Amany A. Megahed, Ehab H. Abdelhay, Mohamed Abdelazim, Heba Y. M. Soliman
Summary: This paper presents a compact two-port MIMO antenna array system operating in the frequency range of 27-40 GHz. The array achieves high impedance matching for 5G MMW and exhibits a gain of approximately 10 dBi and a radiation efficiency of approximately 95%. The design utilizes a decoupling surface between the antennas to reduce mutual coupling and demonstrates a promising reduction in mutual coupling below -35 dB. Additionally, the proposed construction is cost-effective and achieves diversity gain of approximately 10 dB.
EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING
(2023)
Article
Engineering, Electrical & Electronic
Xide Mei, Ke-Li Wu
Summary: In this article, a capacity-oriented envelope correlation coefficient (ECC) is proposed for assessing a multiple antenna system of a MIMO mobile device. The ECC-M is proven to reflect the impact of radiation patterns and total efficiencies of multiple antennas on channel capacity. By studying two channel models, an easy-to-use ECC-M expression is derived and shown to be important in assessing the performance of multiple antennas.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Amany A. Megahed, Mohamed Abdelazim, Ehab H. Abdelhay, Heba Y. M. Soliman
Summary: This study proposes a compact MIMO antenna system for 5G NR sub-6 GHz and 5 GHz WLAN, with good impedance matching and isolation. By using orthogonal orientation and other techniques, the mutual coupling between antenna elements is improved, and the overall performance of the antennas is enhanced.
Article
Engineering, Electrical & Electronic
Reza Zaker, Ali Kheirdoost
Summary: The novel broadband matching and decoupling network (MDN) is designed for a symmetric two-element array of microstrip patch antennas, achieving increased efficiency and isolation through the excitation of new half-modes with parallel shorting posts. A resonator-based equivalent-circuit model is used to study the coupling mechanism. Overall, the proposed design outperforms other state-of-the-art approaches.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Review
Computer Science, Information Systems
Lovish Matta, Bhanu Sharma, Manish Sharma
Summary: Ultrawideband technology, with its unique characteristics and efficient data transmission, shows great potential in replacing conventional wireless technologies. The combination of UWB with MIMO offers high-speed web access and solves the multipath propagation problem.
Article
Engineering, Electrical & Electronic
Mingzhe Hu, Yue Li
Summary: This paper proposes a wideband and low-profile microstrip antenna for MIMO applications, which simultaneously excites three modes to achieve wideband radiation. The proposed antenna has a compact size and low profile, making it suitable for 5G mobile MIMO applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Computer Science, Information Systems
Partha Pratim Shome, Taimoor Khan, Ahmed A. Kishk, Yahia M. M. Antar
Summary: This study presents a miniaturized quad-element MIMO antenna with low mutual coupling and inherent isolation for an IoT-based high-speed smart entertainment network. The antenna, using UWB technology, achieves wide bandwidth, high gain, and good isolation without dedicated decoupling structure. The antenna is suitable for UWB applications based on its simulated and measured results.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Kuttathati Srinivasan Vishvaksenan, Rajakani Kalidoss, Bactavatchalame Partibane, Elango Nivetha
Summary: This paper presents a miniaturized broadband monopole antenna design for 5G and WLAN applications in mobile handsets. The antenna improves impedance matching through slot and stub loading techniques and achieves bandwidth broadening using lumped elements. The prototype eight-element MIMO antenna offers good performance with low envelope correlation, high diversity gain, and greater than 72% total efficiency.
INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
K. Kaboutari, V Hosseini
Summary: This research presents a small 4 x 4 printed MIMO antenna for Industrial, Scientific, and Medical (ISM) systems with medical applications, featuring high isolation, narrow frequency band, and small dimensions.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2021)
Article
Chemistry, Analytical
Meshari Alsharari, Vishal Sorathiya, Ammar Armghan, Kavan Dave, Khaled Aliqab
Summary: In this study, the six-element split ring resonator and circular patch-shaped multiple input, multiple output (MIMO) antenna operating in the 1-25 GHz band were numerically investigated and experimentally verified. Various physical parameters, including reflectance, gain, directivity, VSWR, and electric field distribution, were analyzed for the MIMO antennas. Additionally, parameters such as the envelope correlation coefficient (ECC), channel capacity loss (CCL), total active reflection coefficient (TARC), directivity gain (DG), and mean effective gain (MEG) were explored to determine an optimal range for multichannel transmission capacity. The proposed MIMO antenna showed the potential for ultrawideband operation at 10.83 GHz with -19 dB return loss and -28 dBi gain values. It also exhibited a minimum return loss of -32.74 dB within a bandwidth of 6.89 GHz for the operating band of 1.92 to 9.81 GHz. The study also investigated the effects of a continuous ground patch and a scattered rectangular patch on the antennas. These findings have significant implications for the application of ultrawideband operating MIMO antennas in satellite communication with C/X/Ku/K bands.
Article
Engineering, Electrical & Electronic
Chao Li, Mohammad S. Sharawi, Raj Mittra
Summary: A method of moments (MoM)-based procedure is proposed to calculate the scattering from homogeneous dielectric bodies. The proposed approach uses quadrilaterals to approximate the geometry and piecewise sinusoidal basis functions for surface current approximation, which eliminates the need for Green's function and reduces singularity concerns. By employing a characteristic basis function method and a new characteristic basis function generation strategy, the computational complexity is further reduced and the performance is enhanced.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Xiang Li, Mohamed Helaoui, Fadhel M. Ghannouchi, Yulong Zhao, Chang Liu, Wenhua Chen, Mohammad S. Sharawi
Summary: This article extends the theory of Class-X power amplifiers by considering the number of harmonics and demonstrates the impact of the number of harmonics on maximally flat waveforms and efficiency.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2022)
Article
Engineering, Electrical & Electronic
Samaneh Sadeghi-Marasht, Mohammad Reza Rahimi, Mohammad S. Sharawi, Anding Zhu
Summary: This paper proposes a novel single-layer planar lens antenna that can maintain circular polarization (CP) of the incoming CP wave and enhance the antenna gain. The symmetric design of the lens unit cell ensures a 90-degree phase difference and high amplitude between two modes of the incoming CP wave. The phase variations created by the designed unit cells result in antenna gain enhancement. The proposed lens is tested with two different feeding antennas and achieves high gains and an impedance bandwidth below 3 dB.
IET MICROWAVES ANTENNAS & PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Kanishka Katoch, Naveen Jaglan, Samir D. Gupta, Mousa Abdollahvand, Mohammad S. Sharawi
Summary: This paper presents an ultraminiaturized bandstop closed-loop 2.5D frequency-selective surface (FSS) for sub-6 GHz 5G wireless communication. The proposed structure forms a modified closed-loop design by interconnecting metallic elements with four metallic vertical vias. It achieves a resonant notch at 3.62 GHz and effectively blocks the entire sub-6 GHz 5G band. The prototype shows good agreement between simulated and measured results and exhibits polarization insensitivity.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Rakhesh Singh Kshetrimayum, Mohit Mishra, Sonia Aissa, Shiban K. Koul, Mohammad S. Sharawi
Summary: This letter calculates the diversity order (DO) and diversity measure (DM) of multiple-input multiple-output (MIMO) antennas in various practical scenarios of single-user, multiuser, and massive MIMO wireless communications. These metrics are computed using the antenna correlation coefficient (ACC) matrix. The DO is obtained from the rank of the ACC matrix, while the DM is derived from the trace and Frobenius norm of the ACC matrix. Numerical results are presented, highlighting that the DM captures the impact of antenna correlation on diversity gain more effectively than the DO.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Computer Science, Information Systems
Hussein Attia, Ahmad Abdalrazik, Mohammad S. Sharawi, Ahmed A. Kishk
Summary: This paper proposes a novel millimeter-wave wideband circularly polarized antenna array for Internet of Things applications. The design uses elliptically shaped dielectric resonator antennas to improve radiation characteristics and achieve circular polarization. Two different sequential-phase corporate feed networks are studied to obtain wider impedance, gain, and axial ratio bandwidths. The proposed antenna exhibits an impedance bandwidth of 35%, a gain bandwidth of 19.3%, and an axial ratio bandwidth of 22.6%. The results show that this wideband circularly polarized antenna has potential in preventing polarization mismatch losses between IoT devices and satellites.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Mohit Mishra, Sumantra Chaudhuri, Rakhesh Singh Kshetrimayum, Mohammad S. Sharawi, Ahmed A. Kishk
Summary: This paper presents a sector-shaped compact p /8 partial substrate integrated waveguide cavity antenna from the TM220 diagonal mode of the SIW cavity. A 61% size miniaturization is achieved compared to the SIW rectangular cavity in its complete mode configuration. The compact cavity radiator is used as an element of a compact 8-port multiple-input-multiple-output (MIMO) antenna.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Chao Li, Mohammad S. Sharawi, Raj Mittra
Summary: An adaptive frequency sampling (AFS) strategy is proposed to reduce the solution time for wideband scattering from objects buried in layered media. The AFS algorithm selects frequency samples (FSs) based on error-estimators, minimizing the number of required samples while guaranteeing solution convergence. Numerical results show significant reduction in sample requirements without compromising accuracy.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Mohammad Moradi, Mohammad S. Sharawi, Ke Wu
Summary: This article presents and derives an analytical model for accurately analyzing lossy dielectric waveguides in the THz regime. By considering the dielectric loss of waveguides and applying the impedance boundary condition (IBC), the proposed method can accurately simulate the waveguiding behavior. The efficiency of the proposed method in terms of simulation runtime is significantly improved compared with some commercial EM software packages, while maintaining a minimum accuracy of 95%.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Computer Science, Information Systems
Saeed Haydhah, Ryan Gold, Zhiyong Dong, Fabien Ferrero, Leonardo Lizzi, Mohammad S. Sharawi, Ahmed A. Kishk
Summary: A new compact multifunctional pattern reconfigurable 2x2 antenna array at 3.65 GHz with high gain and 16 MIMO modes is proposed. The array consists of single-element antennas with U-slots etched on the ground plane and fed using a reconfigurable feeding network. The antenna array achieves high efficiency, peak gain, and impedance-bandwidth, making it suitable for small cell base-station applications.
Article
Engineering, Electrical & Electronic
Reza Shamsaee Malfajani, Hamed Niknam, Sampada Bodkhe, Daniel Therriault, Jean-Jacques Laurin, Mohammad S. S. Sharawi
Summary: This paper presents the design and implementation of a dual wide-band mushroom-shaped antenna. The antenna consists of a cylindrical dielectric resonator (cDRA), a cylindrical dielectric rod as a waveguide (cDR), and a dielectric lens (DL). The antenna operates at sub-6GHz and mm-wave frequencies, achieving high gains. The dual wide-band antenna is designed and fabricated with different dielectric constants, and 3D printing is used to control the dielectric constant of printed components. Measurement results show significant gains and bandwidths in both frequency bands.
IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Reza Shamsaee Malfajani, Hamed Niknam, Sampada Bodkhe, Daniel Therriault, Jean-Jacques Laurin, Mohammad S. S. Sharawi
Summary: This paper presents the concept of encapsulated dielectric resonator antennas (E-DRAs) where smaller-sized DRAs with a specific permittivity are embedded inside a larger DRA with a lower permittivity, enabling efficient radiation at two widely separated and widely covered frequency bands. The proposed E-DRAs cover the sub-6-GHz band and mm-wave band for 5G and beyond applications, and are fabricated using fused filament fabrication (FFF) 3D printing process. The measurements show high gain and efficiency at both bands, with the achieved bandwidths being the highest among previous works on dual-band antennas.
IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Reza Shamsaee Malfajani, Jean-Jacques Laurin, Mohammad S. S. Sharawi
Summary: This paper presents the design and implementation of a wideband single-mode dielectric resonator antenna (DRA) with a substrate integrated cavity-backed structure. The DRA is excited by two short-circuited striplines inside the substrate integrated cavity (SIC) to provide stable radiation characteristics and low cross polarization levels. The coupling between the cavity and the cylindrical DRA is achieved through an annular slot, resulting in the excitation of the fundamental HEM11 delta mode over a wide frequency band. The measured performance shows a high gain of 8.2 dBi at 5.45 GHz and a 1-dB bandwidth of 23%.
IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Usman Qureshi, Muhammad Umar Khan, Mohammad S. Sharawi, Shah Nawaz Burokur, Raj Mittra
Summary: This paper presents a broadband graded index all-dielectric (GID) lens that enables field decorrelation and decoupling of closely spaced wideband multiple-input-multiple-output (MIMO) antenna elements. The proposed technique achieves a reduction in correlation coefficient rho by tilting the individual antenna element radiation patterns and suppressing surface wave propagation inside the antenna substrate using the concept of transformation electromagnetics (TE). Simulated and measured results validate the effectiveness of the proposed technique, which provides reduced rho for both isotropic and non-isotropic propagation environments and enhanced port isolation without reducing the fractional bandwidth (FBW).
IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Md Rasheduzzaman Al-Amin, Chao Li, Mohammad S. Sharawi
Summary: A lumped element-based equivalent circuit model for connected slot antenna arrays (CSAA) is proposed, which accurately represents the impedance and reflection characteristics. It provides a generalized design procedure for antenna design and analysis in microwave and millimeter wave bands.
IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION
(2022)
