ACES Publication Search
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| Title: | ACES Journal November 2021 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1456 KB |
| Title: | ACES Journal November 2021 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 280 KB |
| Title: | ACES Journal November 2021 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 220346 KB |
| Title: | New Approximate Expressions for Evaluating the Fields of a Vertical Magnetic Dipole in a Dissipative Half Space |
| Abstract: | In this paper, a set of new asymptotic approximate expressions for evaluating the electromagnetic (EM) fields generated by a vertical magnetic dipole placed in a dissipative half space is proposed. The lateral wave that guarantees the continuity of the EM fields at the interface is discussed in detail. Using the spectral method, the integral expressions of the field components are obtained. The dominant part is extracted from the lateral wave for large radial distance so that all field components in this situation can be approximately expressed with explicit expressions, which makes the method efficient. Besides, the proposed method has no restriction condition on the parameter choices of different half spaces, so it can be applied in more general situations. Some calculation results and comparisons are given to validate the effectiveness of this extraction method. |
| Author(s): | H. Deng, G. Xiao, S. Huang |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1861 KB |
| Title: | The 3D Modeling of GATEM in Fractured Random Media Based on FDTD |
| Abstract: | Grounded-source airborne time-domain electromagnetic (GATEM) method is an effective detection method of geological survey. The real geological media are rough, self-similar characteristics, and the diffusion process is anomalous diffusion. This paper primarily considers the GATEM responses of a grounded wire source in random media. Von Karman function is used to establish three-dimensional (3D) random media model and the GATEM responses are realized based on 3D finite-difference time-domain (FDTD) method. The method is verified by homogeneous half-space model. The electromagnetic responses of random abnormal body model are analyzed, and the results show that the abnormal body can be clearly identified. The electromagnetic responses of a fractured model are analyzed, and the results show that the tilt angle of the fault can be reflected. |
| Author(s): | Q. Wu, Y. Zhang, S. Guan, D. Li, Y. Ji |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 762 KB |
| Title: | Electromagnetic–AI-Based Design Optimization of SynRM Drives |
| Abstract: | Characterization modules in electric machines and drives design optimization environments typically involve the use of electromagnetic finite element-state space models that require large number of iterations and computational time. It is shown in this work that the utilization of a Taguchi orthogonal arrays method in conjunction with a particle swarm optimization (PSO), search algorithm in a design optimization case study of a synchronous reluctance motor (SynRM) drive, resulted in about 80% reduction of computational time |
| Author(s): | A.A. Arkadan, N. Al Aawar |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 562 KB |
| Title: | Triangular Ring Patch Antenna Analysis: Neuro-Fuzzy Model for Estimating of the Operating Frequency |
| Abstract: | In this study, a neuro-fuzzy (NF) analysis method is suggested for the estimation of the operating frequency of triangular ring patch antennas (TRPAs) that operate at ultra high band applications. Although the analysis of regular-shaped patch antennas (PAs) such as rectangular, triangle, and circle is easy, analysis of irregularly shaped patch antennas is difficult and time consuming. Here, this great effort and time has been eliminated by using an artificial intelligence technique such as NF. To create a data set for NF, 100 TRPAs with different physical and electrical properties (L, l, h, and er) are simulated by using an electromagnetic simulator program. The currency and accuracy of the proposed approach is then confirmed on the measurement results of a prototype TRPA fabricated in this study. The results of NF model are compared with the simulation/ measurement results and previously the method published in the literature. |
| Author(s): | A. Kayabasi |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 4601 KB |
| Title: | Quad-Band MIMO Antenna System for 5G Mobile Handsets |
| Abstract: | An efficient Multi-Input Multi-Output (MIMO) antenna system with a spatial diversity configuration for the Fifth Generation (5G) mobile handsets is constructed from a compact-size quad-band (28/45/51/56 GHz) microstrip patch antennas. The antenna is constructed as primary and secondary patches which are capacitively coupled and designed to realize impedance matching and to produce appropriate radiation patterns in the four frequency bands. The novel quad-band patch antenna includes complicated radiation mechanisms required for multiple-band operation. Twoport and four-port MIMO antenna systems that employ the quad-band patch antenna are proposed in the present work for the 5G mobile handsets. Numerical and experimental investigations are achieved to assess the performance of both the single-element antenna and the proposed MIMO antenna systems including the return loss at each antenna port and the coupling coefficients between the different ports. It is shown that the simulation results agree with the experimental measurements and both show good performance. The bandwidths achieved around 28, 45, 51, and 56 GHz are about 0.6, 2.0, 1.8, and 1.3 GHz, respectively. The radiation patterns produced when each port is excited alone are shown to be suitable for spatial diversity scheme with high radiation efficiency. It is shown that the envelope correlation coefficient (ECC) and the diversity gain (DG) are perfect over the four frequency bands. |
| Author(s): | M. A. El-Hassan, A. E. Farahat, K. F. A. Hussein |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1242 KB |
| Title: | Slit-Loaded Hexagonal Patch for Body Area Network Applications at 5.8 GHz |
| Abstract: | Increasing population and expanding remote healthcare monitoring needs have provided an impetus to the research and development of wireless devices. The quest for smaller antennas for wireless devices has led to the design of the proposed antenna. In this work, we present a slit-loaded hexagonal patch antenna for body area network applications. The antenna has been designed on a 0.193λ×0.193λ×0.03λ FR4-epoxy substrate. The radiator patch has two parallel slits. The antenna resonates at 5.8 GHz (ISM band) with a wide bandwidth of 1.15 GHz. A maximum gain of 5.81 dB and a front-to-back ratio of 11.93 dB is observed at 5.8 GHz. Radiation efficiency is observed to be 72.3%. The measured return loss values show a close agreement with the simulated results. Specific absorption rate (SAR) analysis on a simplified 2/3rd muscle model shows an average SAR of 0.5633 W kg-1, due to the use of a full-ground plane. The simulations were done in ANSYS HFSS. The antenna is suitable for on-body communications. |
| Author(s): | S. Mahapatra, M. N. Mohanty |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 2286 KB |
| Title: | Switched Beam Antenna System for V2V Communication in 5G Applications |
| Abstract: | In this paper, a switched beam antenna system consists of four Vivaldi antennas for vehicle-to-vehicle communication is presented. The proposed design is realized on a substrate material of “Rogers 5880” with εr= 2.2, tand = 0.002, and 0.508-mm substrate thickness. The antenna is designed to operate at a center frequency of 28 GHz with operating bandwidth of 1.463 GHz. An overall realized gain of 9.78 dBi is achieved at the intended center frequency. The proposed antenna is designed and simulated using CSTMWS. It is also fabricated using photolithography techniques and measured using R&S vector network analyzer. Good agreement is obtained between both CSTMWS and measured results. |
| Author(s): | A. M. Ameen, M. I. Ahmed, H. Elsadek, W. R. Anis |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1832 KB |
| Title: | Convergence Determination of EMC Uncertainty Simulation Based on the Improved Mean Equivalent Area Method |
| Abstract: | Uncertainty analysis plays a significant role in electromagnetic compatibility (EMC) simulation, but suffers from convergence determination thereby reducing simulation accuracy and computational efficiency. In this paper, an improved mean equivalent area method is proposed to enhance calculation accuracy. It shows that, using a benchmark example, the proposed method successfully achieves the convergence determination of the stochastic reduced order models (SROMs), and realizes further promotion of uncertainty analysis method. |
| Author(s): | J. Bai, J. Sun, N. Wang |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 421 KB |
| Title: | Design of Microstrip Filter by Modeling with Reduced Data |
| Abstract: | Many design optimization problems have high-scale problems that require the use of a fast, efficient, accurate, and reliable model. Recently, artificialintelligence- based models have been used in the field of microwave engineering to model complex microwave stages. Here, an eight-layer symmetrical microstrip lowpass filter (LPF) is modeled using a multi-layer perceptron (MLP) with reduced data with Latin hypercube sampling. It is used to obtain target-test relationships in the MLP model along the frequency band whose electrical length in each layer determines the performance of the microstrip filter. Electrical length lower and upper limits were preferred in the widest range. The study presents the design and analysis of a non-uniform symmetrical microstrip LPF with a cutoff frequency of 2.4 GHz. Next, different network models are compared to find the variation of the non-uniform microstrip LPF around 2.4 GHz along the specified frequency band S11 and S22 (dB) for different electrical lengths. It has been observed that the network models of the microstrip LPF are both more computationally efficient and as accurate and reliable as the electromagnetic simulator. |
| Author(s): | A. Uluslu |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 404 KB |
| Title: | A Compact Bandstop Filter Design Using DMS-DGS Technique for Radar Applications |
| Abstract: | In this study, a novel compact bandstop filter (BSF) by utilizing the defected ground structure (DGS) and defected microstrip structure (DMS) techniques are presented. DGS, DMS, and compensated capacitors are used on both bottom and top layers to obtain sharp transition and wider stopband. The operating frequency bandwidth of the filter can be comfortably regulated by tuning the dimensions of the etched structures. In addition to parametric studies, an equivalent circuit model of the proposed filter is extracted. The BSF has an insertion and return losses better than –1.6 and –17 dB in the passband, respectively. Moreover, the developed filter covers X-band frequency range and has stop bandwidth of 10.8–11.8 GHz with the rejection of better than 20 dB. Furthermore, the measurement and simulation results are in compliance with the suggested method. The proposed BSF has a very small size of 14.28 mm × 4 mm × 0.508 mm and has the potential to be used for radar applications with its high compactness, low cost, and high harmonic rejection performance. |
| Author(s): | B. Dokmetas, G. O. Arican, N. Akcam, E. Yazgan |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 18808 KB |
| Title: | Mainlobe Interference Suppression via Eigen-Projection Processing and Covariance Matrix Reconstruction in Array Antenna |
| Abstract: | When the received data contains the desired signal, the performance of most mainlobe interference suppression methods is seriously degraded. To solve this problem, a novel mainlobe interference suppression method based on eigen-projection processing and covariance matrix reconstruction for array antenna is proposed in this paper. The method constructs the sidelobe interference plus noise covariance matrix (SINCM) and remove the mainlobe data of the covariance matrix. Then, it uses eigen-projection technology to remove the mainlobe interference in the received data and correct the SINCM to make the proposed method has better ability to suppress the mainlobe interference and sidelobe interference when the received data contains the desired signal. Simulation results demonstrate the superior performance of the proposed beamformer relative to other existing methods. |
| Author(s): | B. Yang, W. Li, S. Li |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 437 KB |
| Title: | Planar Magnetic Integration Design Based on LLC Resonant Converter |
| Abstract: | High power density and high efficiency is a major trend in the development of power converters. The main measure to reduce the size of power converter is to improve the working frequency, and the limiting factor is the size of magnetic components. With the development of new semiconductor devices, the working frequency of power converters has been significantly improved, which gives us the opportunity to apply printed circuit board (PCB) winding planar magnetics. Compared with the traditional high frequency magnetics, planar magnetics not only reduce the size of the magnetic components effectively but also improve reliability through repeatable automated manufacturing, which is convenient for large-scale production. Magnetic integration is another method to reduce the size of the power converter. In this paper, a new magnetic structure based on PCB winding is proposed, which integrates inductance and transformer into one component. And the inductor can be independent of the transformer. In this structure, the inductance of inductor and excitation inductance of transformer can be easily controlled by changing the number of winding turns or the length of the air gap. A 20-W 200-kHz halfbridge LLC resonant converter with a peak efficiency of 94.9% is built to verify the feasibility of the designed planar magnetic integrated structure. |
| Author(s): | X. Deng, K. Zheng, Y. Gu, A. Zhang, Z. Jia |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 17573 KB |
| Title: | A Compact and High-Performance Shielding Enclosure by Using Metamaterial Design |
| Abstract: | A compact and high-performance shielding enclosure designed by metamaterial structure based on frequency selective surface (FSS) is proposed. The enclosure has large holes for convenience of airflow and cable access. However, it can achieve great shielding performance by maintaining more than 40 dB attenuation. The shield is composed of n× n unit cells, and each unit cell is designed by knitting the 2.5- dimensional loop-type elements interconnected through vias. This design shows promising capability of size reduction, bandwidth expansion, and shielding effectiveness enhancement. Moreover, the enlarged holes on the FSS are helpful for the ventilation and heat dissipation. The size of the proposed 2.5-D FSS is only 0.097λ0×0.097λ0, where λ0 corresponds to free space wavelength of resonance frequency. The proposed structure provides 3.38 GHz (3.21–6.59 GHz) wide shielding bandwidth. Furthermore, it has stable response to the wide-angle incident wave ranging from 0° to 85° with more than 40 dB attenuation at 4.83 GHz for both xpolarization and y-polarization. The proposed FSS is practically useful for the shielding of fifth generation (5G) wireless systems, WiMAX, and WLAN. |
| Author(s): | K. Cui, D. Shi, C. Sun, X. Liu |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 169738 KB |
| Title: | Interaction Magnetic Force of Cuboidal Permanent Magnet and Soft Magnetic Bar Using Hybrid Boundary Element Method |
| Abstract: | The hybrid boundary element method for solving a three-dimensional magnetostatic problem is presented in this paper for the first time. The interaction force between the cuboidal permanent magnet and the bar, made of soft magnetic material, is calculated. Results of the presented approach are confirmed using COMSOL Multiphysics as well as with the results of the image theorem that is applicable when the dimensions of the bar are large enough; so it could be considered an infinite soft magnetic plane. |
| Author(s): | A. N. Vuckovic, M. T. Peric, S. S. Ilic, N. B. Raicevic, D. M. Vuckovic |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 448 KB |
| Title: | Comparative Study on Improved and Traditional Equivalent Circuit of Long Primary Double-Sided Linear Induction Motor |
| Abstract: | Based on the quasi-two-dimensional (2D) field model of long primary double-sided linear induction motor (LPDLIM), an improved equivalent circuit model is proposed. First, the traditional equivalent circuit of LPDLIM is reviewed. Second, the skin effect correction coefficients for the secondary equivalent resistance and excitation reactance, and the secondary leakage inductance are derived. Moreover, an improved equivalent circuit model for LPDLIMs is presented, in which the leakage reactance of the secondary is considered, and the excitation reactance and secondary resistance are modified by the correction coefficients independently. Then, the slip frequency characteristics of various effect forces and variations of forces under different operations and mechanical air gap width are presented. Finally, the calculated forces by the proposed equivalent circuit are validated by the finite element method results and also compared with that of the traditional equivalent circuit model. |
| Author(s): | Q. Zhang, H.-J. Liu, Z.-Y. Zhang, T.-F. Song, Y. Wang |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 11 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1780 KB |