Article
Engineering, Electrical & Electronic
Yuqi Wang, Zhipeng Hu, Quan Xue
Summary: A novel wideband folded dipole antenna (FDA) with stable radiation patterns under multiresonant modes is proposed. Experimental verification shows that the proposed FDA has a bandwidth of about 82% from 1.72 to 4.10 GHz and exhibits stable radiation patterns in the entire operating band.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Chunling Chen
Summary: This article presents a design of a high out-of-band suppressed compact wideband filtering dipole antenna with a dual-mode compressed parasitic folded dipole, achieving a wide bandwidth and high out-of-band suppression level.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Liang Hua Ye, Da Gui Ye, Zhuozhu Chen, Jian Feng Li
Summary: This paper introduces an ultrawideband dualpolarized antenna composed of a main radiator, parasitic elements, and a ground plane. The main radiator consists of cross-arranged dual dipoles fed by coplanar-strip lines to achieve +/- 45 degrees dual-polarization within a wide frequency band. Parasitic elements, including a circular patch and four pairs of dipole strips, are used to improve radiation performance in high frequencies. The proposed antenna covers the frequency range from 1.7 to 5.1 GHz for both polarizations, with a gain of 8.2 +/- 0.7 dBi and a half-power beamwidth of 65 degrees +/- 5 degrees. The measured results agree well with simulated ones, indicating its potential for future base-station communication systems.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Bing-Jie Xiang, Kwai-Man Luk
Summary: In this paper, a low-profile wideband folded transmitarray (TA) antenna is proposed by combining a TA aperture and a reflective polarization-conversion surface (RPCS). The spherical wave is transformed into a planar wave by the TA aperture, and a virtual feed is generated by the phase-gradient RPCS to reduce the profile height. A prototype operating at 27 GHz is designed, fabricated, and measured to verify the performance of the low-profile TA antenna.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Ali Heidari, Reza Zaker, Ali Kheirdoost
Summary: A new low-profile method for improving the bidirectional gain of a dual-element folded dipole antenna (DFDA) is proposed. The method utilizes integrated parasitic elements to condition the surface current distribution while preserving the radiators. A middle layer consisting of metal strips embedded between the upper and lower surfaces of the dipole, called midstrips, is introduced to polarize the dipole currents. The presence of the midstrips polarizes the cross currents on the dipole surface, improving radiation-polarization purity and leading to a gain enhancement.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Computer Science, Information Systems
Heesu Wang, Gangil Byun, Yong Bae Park, Ikmo Park
Summary: This paper presents a circularly polarized wideband uniplanar crossed-dipole antenna. The antenna consists of two identical crossed-dipole arms printed on a dielectric substrate. Each arm is a pair of perpendicular thin dipole arms connected with a folded stripline for generating circularly polarized radiations. Rectangular stubs are introduced at the center and sides of the dipole arms to improve impedance-matching and broaden the axial ratio bandwidth. The antenna achieves a wide bandwidth and bidirectional radiation patterns.
Article
Chemistry, Multidisciplinary
Lianpeng Xue, Qiangquan Tan, Ke Cheng, Kuikui Fan
Summary: A low-profile planar millimeter-wave folded dipole antenna fed by substrate integrated waveguide (SIW) is proposed in this letter, achieving the widest working bandwidth and low cross-polarization level. Experimental results demonstrate a -10 dB impedance bandwidth of 58.5%, a gain of around 5 dBi with more than 120 degrees beamwidth, and cross-polarization levels below -15 dB, suitable for use as the terminal antenna of the MMW communication system.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Multidisciplinary
Farah R. Kareem, Mohamed El Atrash, Ahmed A. Ibrahim, Mahmoud A. Abdalla
Summary: This paper presents two textile-based printed inspired Folded Dipole Antennas (FDAs) for health monitoring of Covid-19 infected patients. One antenna is mounted on the human's chest and the other is mounted on a surgical mask. Both antennas demonstrate suitable performance for wearable applications and Wi-Fi services.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Chunling Chen
Summary: This article presents a design of a compact wideband filtering dipole antenna with an omnidirectional radiation pattern. By coupling different types of dipoles, it achieves wide bandwidth and radiation patterns. Both electric and magnetic coupling are observed at different frequency bands, allowing for the antenna to achieve two radiation nulls without the need for extra circuit.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Romain Greard, Mohamed Himdi, Dominique Lemur, Gwenal Le Dem, Pierre Thaly, Cyrille Le Meins
Summary: This paper discusses a novel structure of a semi-elliptical folded dipole antenna for ultra-wideband (UWB) receiving applications. The antenna has a directive radiation pattern and achieves high gain over the bandwidth. By using planar technology and optimized curves, the antenna achieves a measured impedance bandwidth of 2.3-26 GHz, meeting the accepted level for receiving antenna. The antenna also offers reconfiguration capability, making it suitable for modern wireless communications and antenna arrays (MIMO systems).
Article
Engineering, Electrical & Electronic
Xuan Yi, Hang Wong
Summary: This article presents a novel folded horn-fed open slot antenna with wide bandwidth and high gain for millimeter-wave applications. The antenna has a three-layer planar structure and is designed with differentially fed excitations. It achieves a wide impedance bandwidth and stable radiation patterns.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Xiyao Liu, Kwok Wa Leung, Nan Yang
Summary: A compact horizontally polarized omnidirectional dielectric resonator antenna excited in the TE011+delta mode is presented, with an enhanced impedance bandwidth and suppressed cross-polar field. This antenna can be polarization reconfigured using diodes to switch between horizontal and vertical polarizations, with stable omnidirectional radiation patterns in both states.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Anamika Verma, Mahima Arrawatia, Girish Kumar
Summary: The low-profile broadband folded dipole antenna with high gain reduces the reflector height without degrading impedance bandwidth. Parasitic patches are used to minimize gain variation, resulting in a stable radiation pattern over a wide bandwidth. The antenna exhibits good performance with a high gain and low cross-polarization level across the operating frequencies.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Wang Yao, Huotao Gao, Ying Tian
Summary: This communication proposes a wideband balun with adjustable impedance for dipoles with different impedances. The balun achieves balanced-unbalanced conversion through aperture coupling and has the capability of impedance conversion. Experimental results demonstrate the versatility of the balun.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Heesu Wang, Ikmo Park
Summary: In this work, a novel circularly polarized dipole antenna fed by modified quadrature hybrid couplers is proposed. The antenna achieves wide axial ratio bandwidth and stable radiation patterns by using a modified QHC with minimal variation in the phase and amplitude difference between the output ports over a wide frequency range. The antenna demonstrates good performance parameters including impedance bandwidth, AR bandwidth, and relatively small size.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Multidisciplinary
Amir Ganjavi, Firuz Zare, Dinesh Kumar, Amin M. Abbosh, Konstanty S. Bialkowski, Pooya Davari
Summary: This article addresses the modeling of common-mode currents in motor drive systems with long feeder cables. A mathematical approach is used to extract the common-mode model of power cables and model the noise sources. Through this modeling strategy, the harmonic spectrum of resonances can be precisely analyzed.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Computer Science, Interdisciplinary Applications
L. Guo, N. Nguyen-Trong, A. Al-Saffar, A. Stancombe, K. Bialkowski, A. Abbosh
Summary: This study presents a calibrated microwave tomography method that addresses the mismatch between simulated environment and real-life system. The method uses two homogeneous calibration phantoms and a modified iterative solver to match the forward solver to real-life measurements. Experimental results confirm the effectiveness of the presented approach and its superiority to other tomographic methods.
IEEE TRANSACTIONS ON MEDICAL IMAGING
(2022)
Article
Engineering, Multidisciplinary
Amir Ganjavi, Dinesh Kumar, Firuz Zare, Amin M. Abbosh, Hansika Rathnayake, Pooya Davari
Summary: This article analyzes the effect of choke placement on common-mode noise at the 9-150 kHz frequency range. The study compares the use of two dc-link choke inductors or three ac-line inductors, and provides theoretical modeling and laboratory test results to support the analysis. The findings show that ac-line inductors are more effective at suppressing low-frequency common-mode contents, while dc chokes are useful in attenuating high-order noise contents.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Seyed Mohammad Hadi Mousavi, Sasan Ahdi Rezaeieh, Amin Darvazehban, Beadaa Mohammed, Azin S. Janani, Amin M. Abbosh
Summary: This paper presents a tapered graded index (GRIN) lens antenna that enhances electromagnetic penetration into the human torso by generating focused planar near-field radiation. The antenna consists of a four-layer lens excited by a modified slot antenna, with each layer filled with engineered materials of specific relative permittivity values. The antenna achieves a focused plan-wave radiation by tapering the lens based on total internal reflection theory, resulting in improved wave penetration inside the torso compared to a body-matched antenna without a lens. The measured results show that the antenna operates over a wide band and achieves a significant improvement in wave penetration inside the torso compared to other existing GRIN lens antennas.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Biomedical
Syed Akbar Raza Naqvi, Ahmed Toaha Mobashsher, Beadaa Mohammed, Damien Foong, Amin Abbosh
Summary: The aim of this study is to characterize non-melanoma malignancies and their corresponding benign conditions in ex-vivo/in-vivo tissue environments, and to investigate the feasibility of microwave techniques for skin cancer detection. The results suggest that there are significant differences in the dielectric properties between cancerous and healthy skin in the in-vivo environment, indicating the potential viability of the microwave band for skin cancer detection.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Azin S. Janani, Sasan Ahdi Rezaeieh, Amin Darvazehban, Shelley E. Keating, Amin M. Abbosh
Summary: This study proposes an electromagnetic technique to assist in observation and detection of hepatic steatosis only by measuring electromagnetic signals from the right side of the torso. The method uses blind source separation and wavelet transform techniques for detection, and can differentiate healthy livers from steatotic livers.
IEEE JOURNAL OF ELECTROMAGNETICS RF AND MICROWAVES IN MEDICINE AND BIOLOGY
(2022)
Article
Computer Science, Theory & Methods
Laith Alzubaidi, Jinshuai Bai, Aiman Al-Sabaawi, Jose Santamaria, A. S. Albahri, Bashar Sami Nayyef Al-dabbagh, Mohammed. A. A. Fadhel, Mohamed Manoufali, Jinglan Zhang, Ali. H. H. Al-Timemy, Ye Duan, Amjed Abdullah, Laith Farhan, Yi Lu, Ashish Gupta, Felix Albu, Amin Abbosh, Yuantong Gu
Summary: Data scarcity is a major challenge in training deep learning models due to the need for a large amount of labeled data. Manual labeling is costly and time-consuming, and many applications lack sufficient data for training. This paper presents a comprehensive overview of state-of-the-art techniques to address the issue of data scarcity in deep learning and provides recommendations for data acquisition and ensuring the trustworthiness of training datasets.
JOURNAL OF BIG DATA
(2023)
Review
Engineering, Electrical & Electronic
Lei Guo, Abdulrahman S. M. Alqadami, Amin Abbosh
Summary: Microwave imaging has gained attention as a potential method for rapid and affordable stroke diagnosis without ionizing radiation. It can be used as a portable scanning device in various settings. While progress has been made, there are still challenges to be overcome for the development of robust and reliable clinical systems. This paper reviews recent systems and processing algorithms, highlighting the progress and limitations in microwave imaging for stroke diagnosis.
IEEE JOURNAL OF ELECTROMAGNETICS RF AND MICROWAVES IN MEDICINE AND BIOLOGY
(2023)
Article
Computer Science, Information Systems
Arman Afsari, Amin Abbosh, Yahya Rahmat-Samii
Summary: Particle swarm optimization (PSO), genetic algorithm (GA), and nonlinear simplex optimization method (SOM) are popular gradient-free optimization algorithms in engineering. SOM has faster convergence rate than PSO and GA in electromagnetic optimization problems with less than 10 parameters, but PSO and GA outperform SOM in finding the global minimum. To improve the accuracy of SOM in problems with few parameters, a quasi-gradient (Q-G) search direction is added to the algorithm.
Proceedings Paper
Engineering, Electrical & Electronic
Fei Xue, Lei Guo, Amin Abbosh
Summary: A deep learning algorithm is proposed for microwave imaging of complex objects, which provides an efficient and fast solution to inverse electromagnetic problems. The algorithm uses a cascaded structure of convolutional and U-net neural networks to solve the scattered wide-band time domain signals. With training and testing using 2000 sets of data covering the band 0.5-2 GHz and complex shaped targets irradiated by 16 antennas, the algorithm achieves mean Intersection over Union (IoU) values near 0.7 for all tested cases and more than 80% of tested cases have less than 50% relative errors compared to the ground truth. These results demonstrate the great potential of the developed algorithm in localization, shape reconstruction, and classification of complex objects in microwave imaging.
2023 5TH AUSTRALIAN MICROWAVE SYMPOSIUM, AMS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Haoyu Zhou, Lei Guo, Amin Abbosh
Summary: A continuously tunable phase shifter based on liquid crystal is proposed, with a working frequency from 10GHz to 60GHz. By using a stripline structure instead of the commonly used inverted microstrip line structure, a larger portion of the waves propagate inside the LC mixture, fully utilizing the tunability brought by the liquid crystal. The proposed structure achieves significantly higher figure of merit values compared to the inverted microstrip line structure, providing 86% more phase shift while maintaining the same insertion loss.
2023 5TH AUSTRALIAN MICROWAVE SYMPOSIUM, AMS
(2023)
Review
Engineering, Electrical & Electronic
Kamel Sultan, Amin Abbosh
Summary: This article thoroughly reviews the current state of EM knee imaging technology, with a specific focus on the systems, frameworks, and challenges involved in its translation to practical clinical usage. The review serves as a valuable resource for researchers, clinicians, and engineers engaged in knee imaging research.
IEEE JOURNAL OF ELECTROMAGNETICS RF AND MICROWAVES IN MEDICINE AND BIOLOGY
(2023)
Article
Computer Science, Information Systems
Azin S. Janani, Amin Darvazehban, Sasan Ahdi Rezaeieh, Amin M. Abbosh
Summary: This study investigates the impact of assuming a local planar wave front on the accuracy of electromagnetic (EM) imaging and explores the use of a lens antenna to improve imaging. The results show that the proposed tapered GRIN lens antenna improves the detection accuracy and localization accuracy compared to conventional GRIN lens and bio-matched loop-dipole antennas. This highlights the importance of creating a focused plane wave front within the imaging domain for improved detection and localization using microwave techniques.
Article
Computer Science, Information Systems
Arman Afsari, Paulo de Souza, Amin Abbosh, Yahya Rahmat-Samii
Summary: This article presents a comprehensive computational electromagnetic modeling method for transistor lasers, capable of determining the antenna characteristics. By reorganizing and solving the existing semiconductor and electromagnetic equations, the electromagnetic field components emitted or absorbed by the device are obtained to determine the various performance indicators of the transistor laser in transmit and receive modes.
