ACES Publication Search
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| Title: | ACES Journal March 2025 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 3 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 1967 KB |
| Title: | ACES Journal March 2025 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 3 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 255 KB |
| Title: | ACES Journal March 2025 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 3 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 16986 KB |
| Title: | Women’s History Month Special Article: Interview with Sima Noghanian |
| Abstract: | In this Special Article, Cynthia Furse interviews Sima Noghanian, Distinguished Hardware Engineer with CommScope Ruckus Networks in Sunnyvale, California, USA. Noghanian has worked in both industry and academia and is well known for her work in computational electromagnetics applied to antenna design. |
| Author(s): | C. Furse |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 3 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 1441 KB |
| Title: | Fast FDTD/TDPO Hybrid Method Based on Spatiotemporal Sparse Sampling |
| Abstract: | Based on a hybrid method of finite-difference time-domain (FDTD) and time-domain physical optics (TDPO), this study employs a sparse sampling technique in near-to-far-field calculations to improve the efficiency of electrical large target computation. In the conventional hybrid method, the transformation from the near-field of the FDTD region to the far-field of the TDPO region involves the largest amount of computation, which can be reduced by applying the sparse sampling optimization method jointly in spatial and time domain. Compared to the conventional method, our proposed algorithm significantly reduces computation time while maintaining a negligible increase in error. Several examples are provided to demonstrate the accuracy and efficiency of our approach. In particular, a large parabolic antenna whose aperture size is 100 wavelengths is computed. The computation time is decreased by up to 91.52% of the conventional method while the maximum relative error is - 21.56 dB. Compared with results of CST software, the method proposed in this work has smaller errors and excellent applicability. |
| Author(s): | L. Wang, J. Chen |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 3 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 908 KB |
| Title: | Miniaturized Polarization Conversion Metasurface for RCS Reduction |
| Abstract: | In this study, a miniaturized polarization conversion metasurface (PCM) with a cell size of 6×6 mm is utilized to reduce the radar cross-section (RCS) of a circularly polarized antenna array. Each cell circuit of the PCM comprises a pair of folded L-shaped strips with a meander line, which are printed on the surface of the substrate. This configuration demonstrates a polarization rotation (PR) bandwidth of 112% and achieves a high polarization conversion ratio (PCR) of 90%. To confirm the efficacy of the RCS reduction, the PCM is integrated with a circularly polarized 2×2 dipole antenna array. The measured results of the array are in excellent agreement with the simulated data, indicating at least a 5 dB reduction in monostatic RCS for the proposed antenna array. Furthermore, the integration of the PCM does not degrade the radiation performance of the antenna array, confirming the PCM’s suitability for RCS reduction without compromising antenna functionality. |
| Author(s): | X. Dai, N. Tang, Z. Li, W. Hu, H. Hong |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 3 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 1280 KB |
| Title: | An Unknown Interference Suppression Scheme for Advanced Antenna Systems |
| Abstract: | An unknown interference suppression scheme for advanced antenna systems has been proposed to address critical challenges in enhancing wireless communication networks. This scheme focuses on improving beamforming capabilities and spectral efficiency while minimizing the impact of unknown interference. The ability to suppress unknown interference is achieved through a fitness function that does not rely on prior knowledge of interference characteristics. This function is designed based on the assumption that the desired signal is received through the main lobe, while interference predominantly resides in the sidelobes. By incorporating a constraint handling technique, specifically the static penalty method, the fitness function ensures that total output power is minimized only when interference power in the sidelobes is effectively reduced. Additionally, the optimization process is streamlined by reducing the number of optimization variables, focusing on uniform rectangular arrays with square element distributions. Metaheuristic algorithms, including the Binary Bat Algorithm, Binary Grey Wolf Optimization, and Binary Whale Optimization Algorithm, are applied to adaptively suppress unknown interference while reducing computational complexity. The proposed scheme significantly enhances advanced antenna systems performance by steering adaptive nulls toward unknown interference sources, ensuring robustness in dynamic wireless environments. |
| Author(s): | L. T. Trang, N. V. Cuong, H. T. P. Thao, T. V. Luyen |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 3 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 628 KB |
| Title: | Design and Analysis of a Novel Vivaldi Antenna With Improved Gain for Fan Motion Detection in Smart Homes Using IR-UWB Radar |
| Abstract: | The proposed antenna is an ultra-wideband Vivaldi antenna optimized for impulse-radio ultrawideband (IR-UWB) radar applications in smart home environments. Designed to detect indoor object motion, including fan movement, the antenna demonstrates enhanced directivity by integrating five semicircular slots and a polygonal structure in the radiating element. Fabricated on a TRF-45 substrate (dielectric constant of 4.5, loss tangent of 0.0035, thickness of 1.62 mm), the antenna exhibits an impedance bandwidth of approximately 2.28 GHz and achieves a maximum gain of 9.59 dBi at 8.5 GHz. The proposed design advances indoor motion detection capabilities for smart home applications by providing a compact, high-gain, and wideband antenna solution. |
| Author(s): | H.-G. Yu, S.-W. Kim |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 3 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 2512 KB |
| Title: | Low SAR-UWB Rectangular Microstrip Magnetic Monopole Antenna for S-Band and Biomedical Applications |
| Abstract: | The development of low specific absorption rate (SAR) antennas is crucial for safety and efficiency in wireless communication and biomedical applications. This study introduces a low SAR ultra-wideband (UWB) rectangular microstrip monopole antenna with an extended ground plane. The design operates effectively in free space and on a human body phantom. It achieves a reflection coefficient of -42.59 dB at 2.48 GHz and covers the S-band from 2.31 GHz to 4.12 GHz with a peak gain of 5.09 dBi in free space. The antenna maintains consistent performances when placed on a human phantom. With reverse and front patch faces, its gain improves to 5.53 dBi and 5.80 dBi, respectively. Experimental validation of the fabricated prototype shows excellent agreement with simulations conducted using high-frequency structure simulators (HFSS) and advanced design systems (ADS). Additionally, lumped-element equivalent circuits are used to analyze impedance behavior in both environments, confirming the antenna’s robust design. |
| Author(s): | C. Zebiri, S. Mekki, D. Sayad, I. Elfergani, M. L. Bouknia, R. Zegadi, A. Varshney, J. Rodriguez |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 3 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 4796 KB |
| Title: | Uncertainty Quantification of Transmission Efficiency in EV-WPT System Based on Gaussian Process Regression |
| Abstract: | The power transfer efficiency of electric vehicle wireless power transmission (EV-WPT) systems is susceptible to differences in the processing of coils and circuit components as well as the driver’s operating level. In order to quantify the uncertainty and save the computational cost, this paper adopts the Gaussian process regression (GPR) agent model to obtain predicted confidence intervals and transmission efficiency probability density function and calculates the response surface based on the agent model, and finally analyzes the degree of the influence of each variable on transmission efficiency by using the Morris one-at-a-time (MOAT) method. The computational time cost of the GPR agentbased model uncertainty quantification method obtained through simulation experiments is 9 hours and 21 minutes, which improves the computational time by 94.5% compared to the Monte Carlo (MC) method. The prediction error of the predicted values of the GPR agent model is only 1.0294% of the measured values, and its variance error is only 3.5587% of the measured values, so that the GPR agent model is able to realize uncertainty quantification (UQ) accurately and efficiently. Results show that the offset between the coupling mechanism and the diameter of the transmitting coil cross-section are the main factors affecting transmission efficiency. |
| Author(s): | T. H. Wang, K. F. Zhao, H.W. Duan, Q. Y. Yu, L. L. Xu, S. S. Guan |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 3 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 950 KB |
| Title: | Advanced Perspectives on Metamaterial Integration in Wireless Power Transfer: A Review |
| Abstract: | The field of wireless power transfer (WPT) has recently seen much innovation and improvement and, as a result, there is an ever-increasing need for high power transfer efficiency (PTE) of the WPT systems, as well as enhanced transmission distance for end users. However, some of the currently available WPT systems have a restricted PTE and transfer distance because they use an inductive coupling technique. With this method, the PTE suffers a significant drop as the distance between the transmitter and receiver coils grows. Alternately, magnetic resonance coupling (MRC) is employed as a mid-range WPT solution. For this method, metamaterials (MTMs) are used to increase efficiency by inserting them between the transmitter (Tx) and receiver (Rx) coils. MTMs are artificially manufactured materials that demonstrate unusual electromagnetic properties. These traits include evanescent wave amplification and negative refractive characteristics, both of which have the potential to be employed for the improvement of PTE. This paper offers an in-depth summary of recent research and development in MTM-based WPT systems. In this overview, we examine previously reported MTM-based WPT systems across a range of characteristics, including configuration, operating frequency, size, and PTE. A comparative of the various MTM-based WPT systems is also provided in this paper. PTEs for these systems were also presented against their normalized transfer distances. This study was conducted with the intention of providing a resource for academics studying WPT systems and their practical implementations. This analysis exposes the developments occurring in MTM-based WPT systems. |
| Author(s): | M. S. Yusri, M. H. Misran, T. K. Geok, S. K. A. Rahim, N. Yusop, M. A. M. Said, A. Salleh |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 3 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 1766 KB |
| Title: | Inversion Method of Lightning Current Distribution on a Surface Conductor Represented by Thin Lines |
| Abstract: | Electromagnetic simulation and pre-analysis of electromagnetic compatibility for lightning effects are important. It is difficult to estimate the surface current of surface structures represented by thin lines. In this study, we simplified the partial element equivalent circuit (PEEC) equation and deduced an equation for the magnetic field based on the thin-line representation method. An inversion method was used to determine the surface current in a frequency-domain PEEC. Parallel computing technology was used to improve the inversion efficiency. Additionally, the capacitive and inductive characteristics of the elements of Darney’s circuit method were developed for PEEC. The results were compared with calculations using the finite integration technique. The application of the thin-line representation method was broadened, and its efficiency has been improved. |
| Author(s): | Z. Duan, C. Tong, Y. Huang, X. Li, S. Qiu, X. Si, Y. Wei, Y. Ling |
| File Type: | Journal Paper |
| Issue: | Volume: 40 Number: 3 Year: 2025 |
| Download Link: | Click here to download PDF File Size: 2559 KB |