ACES Publication Search
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| Title: | ACES Journal August 2020 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 2240 KB |
| Title: | ACES Journal August 2020 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 8062 KB |
| Title: | ACES Journal August 2020 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 21866 KB |
| Title: | A Straight-Forward Method of Moments Procedure to Solve the Time Domain Integral Equation Applicable to PEC Bodies via Triangular Patch Modeling |
| Abstract: | In this work, a simple and straight-forward method of moments solution (MOM) procedure is presented to obtain the induced current distribution on an arbitrarily-shaped conducting body illuminated by a Gaussian plane wave directly in the time domain using a patch modeling approach. The method presented in this work, besides being stable, is also capable of handling multiple excitation pulses of varying frequency content incident from different directions in a trivial manner. The method utilizes standard Rao-Wilton-Glisson (RWG) functions and simple triangular functions for the space and time variables, respectively, for both expansion and testing. The method adopts conventional MOM and requires no further manipulation invariably needed in standard time-marching methods. The moment matrix generated via this scheme is a block-wise Toeplitz matrix and, hence, the solution is extremely efficient. The method is validated by comparing the results with the data obtained from the frequency domain solution. Several simple and complex numerical results are presented to validate the procedure. |
| Author(s): | S. M. Rao |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 3321 KB |
| Title: | A Novel Method for Output Characteristics Calculation of Electromagnetic Devices using Multi-kernel RBF Neural Network |
| Abstract: | The action performance and reliability of electromagnetic devices is critical to the entire working system. In this paper, a new method for calculating the output characteristics of electromagnetic devices is proposed. This method uses the multi-kernel radial basis function neural network (MK-RBFNN) approximation modeling by the finite element calculation results at the key nodes. It obtains the output response of the electromagnetic device under different coil voltages and air gaps. The key of establishing a MK-RBFNN is to obtain the weight coefficients of each single-kernel radial basis function (RBF) model by using a heuristic weighting strategy. When the electromagnetic output characteristics is calculated in the optimization design of the electromagnetic device, this method solves the problem that the traditional method is difficult to balance the calculation accuracy and speed. The effectiveness of the method is verified by the calculation results of the electromagnetic torque of a typical electromagnetic relay. |
| Author(s): | F. Ding, Y. Gao, J. Tian |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1989 KB |
| Title: | A Modified Adaptive Integral Method for Analysis of Large-scale Finite Periodic Array |
| Abstract: | A fast algorithm based on AIM is proposed to analyze the scattering problem of the large-scale finite array. In this method, by filling zeros into the local transformation matrix, the near and far fields are isolated thoroughly to eliminate the near correction process. In the far part, a 5-level block-toeplitz matrix is employed to avoid saving the idle grids without adding artificial interfaces. In the near part, only one local cube is required to compute the local translation matrix and near impedance matrix, which can be shared by all elements. Furthermore, the block Jacobi preconditioning technique is applied to improve the convergence, and the principle of pattern multiplication is used to accelerate the calculation of the scattering pattern. Numerical results show that the proposed method can reduce not only the CPU time in filling and solving matrix but also the whole memory requirement dramatically for the large-scale finite array with large spacings. |
| Author(s): | M. Zheng, H. Zhao, Z. Zhao |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1499 KB |
| Title: | Improving the Efficiency of Hybrid Boundary Element Method for Electrostatic Problems Solving |
| Abstract: | This paper describes a modification of the Hybrid Boundary Element Method (HBEM) for electrostatic problems solving. Such improved method is applied for transmission lines analyses. By taking a quasi-static TEM approach, the Hybrid Boundary Element Method is applied to determine the effective relative permittivity and the characteristic impedance of different stripline structures. Comparisons with already published numerical results and software simulation have been also performed with an aim to test the validity of the proposed approach. A close results match can be noticed. The main novelties of the proposed HBEM modification are better accuracy and ability to determine the polarization charges distribution on the separating surface between a strip and a dielectric layer. This was not possible before, using the previous version of the method. |
| Author(s): | M. T. Peric, S. S. Ilic, A. N. Vuckovic, N. B. Raicevic |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 2022 KB |
| Title: | Comprehensively Efficient Analysis of Nonlinear Wire Scatterers Considering Lossy Ground and Multi-tone Excitations |
| Abstract: | In this paper based on intelligent water drops algorithm (IWD), comprehensively nonlinear analysis of nonlinearly loaded wire scatterers are carried out. The analyses involve two stages. First, the problem is modeled as a nonlinear multi-port equivalent circuit and it is then reformulated into an optimization problem which is solved by the IWD. The simulation results are compared with harmonic balance (HB), arithmetic operator method (AOM), approximate methods and experiment. Analysis of the problem under strongly nonlinear loads, presence of lossy ground, multi-port structures, and multi-ton excitations are included to cover all the complex aspects. In one hand, the proposed modeling approach is in excellent agreement with other conventional techniques. On the other hand, the run time is considerably reduced. |
| Author(s): | A. Bahrami, S. R. Ostadzadeh |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1713 KB |
| Title: | A Compact Eight-port CPW-fed UWB MIMO Antenna with Band-notched Characteristic |
| Abstract: | A compact eight-port coplanar waveguide (CPW)-fed ultra-wideband (UWB) multiple-input-multiple-output (MIMO) antenna with band-notched characteristics in a small size of 54×54×0.8 mm3 is proposed in this paper. The eight-port MIMO antenna consists of four two-port MIMO antennas. For each two-port MIMO antenna, two monopole antenna elements are printed on the FR4 substrate and placed perpendicularly to each other. To increase impedance bandwidth and improve the isolation, a stub is positioned in the middle of two radiating elements. The band-notched characteristic are achieved by etching two L-shaped resonator slots on each radiating elements, respectively. The S11 reflection coefficients, coupling isolation, radiation patterns, peak gain and radiation efficiencies of the MIMO antenna are measured. The MIMO performance of the proposed antenna is analyzed and evaluated by the envelope correlation coefficient (ECC) and total active reflection coefficient (TARC). |
| Author(s): | L.-Y. Chen, W.-S. Zhou, J.-S. Hong, M. Amin |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1740 KB |
| Title: | Design of Polarization Reconfigurable Patch Antenna for Wireless Communications |
| Abstract: | A single fed circularly polarized reconfigurable patch antenna is proposed. The antenna consists of a radiating patch incorporated with an H-shaped slot at its center. Four ultra-miniature switches are used for polarization reconfiguration. The antenna is designed to operate at the center frequency of 2.357 GHz. The antenna achieves either left-hand polarization or right-hand polarization depending upon switching of corresponding switches. The antenna parameters are simulated using Ansoft high-frequency structure simulator and are validated using an Agilent network analyzer (N9925A) and antenna test systems. The antenna achieves a good impedance match of 120MHz between 2.26GHz – 2.38GHz band and achieves low cross-polarization isolation of -22.82 dB for RHCP and -21.77 dB for LHCP configurations at its operating frequency. The antenna finds application in areas of modern wireless communication. |
| Author(s): | A. Priya, S. K. Mohideen, M. Saravanan |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1717 KB |
| Title: | Design of Dual-Band Printed-Dipole Array Antenna with Omni-directional Radiation Behaviour |
| Abstract: | In this paper, we present a compact array of 4 printed dipole antennas with ground plane, operating at 2.7 GHz and 5.2 GHz, designed for base station applications. First, the elementary printed dipole antenna, selected for its small size and good performances, is described. However, this kind of structures cannot cover two bands at the same time, which justify our proposal of a 4-elements network. Next, the 4-elements array is simulated, optimized, and measured to proof its performances with good agreement between the measurements and simulations. The measured gain of the 4-dipoles array is 4.21 dBi and 6.15 dBi for both operating frequencies 2.7 GHz and 5.2 GHz, respectively. |
| Author(s): | J.-M. Floch, A. Mersani, B. Hakim, K. Sedraoui, H. Rmili |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1968 KB |
| Title: | Multi-Mode Narrow-Frame Antenna for 4G/5G Metal-Rimmed Mobile Phones |
| Abstract: | A novel multi-mode narrow-frame antenna is presented for 4G/5G metal-rimmed mobile phones in this paper. The proposed antenna is constituted by a monopole antenna and a coupling strip, which is printed on FR4 substrate with thickness of 0.8 mm. The overall area occupied by the antenna is only 60 × 10.4 mm2, which can be used as a promising narrow-frame antenna. The simulated results shows that the return loss of the antenna can provide four operating bandwidths of 822– 961 (band 1), 1697–3075 (band 2), 3280–3835 (band 3) and 4475–5050 MHz (band 4), which respectively cover 824–960, 1710–2690, 3300–3600 and 4800–5000 MHz in 4G/5G communication systems. In order to verify the accuracy of theoretical analysis and simulated results, the proposed antenna is fabricated and measured. The experimental results are basically consistent with the simulated results, suggesting that the presented antenna has attractive performance for mobile phones. |
| Author(s): | M. Yang, Y. F. Sun, T. Q. Liao |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 2006 KB |
| Title: | Realization of Modified Elliptical Shaped Dielectric Lens Antenna for X Band Applications with 3D Printing Technology |
| Abstract: | Placing dielectric lens structures into an antenna's aperture has proven to be one of the most reliable methods of enhancing its gain. However, the selected material and the prototyping method usually limit their fabrication process. With the advances in 3D printing technology and their applications, the microwave designs that were either impractical or impossible in the past to manufacture using traditional methods, are now feasible. Herein, a novel prototyping method by using 3D-printer technology for low-cost, broadband, and high gain dielectric lens designs has been presented. Firstly, the elliptical lens design has been modeled in the 3D EM simulation environment. Then fused deposition modeling based 3D-printing method has been used for the fabrication of the dielectric lens. The measured results of the 3D printed antenna show that the lens antenna has a realized gain of 17 to 20.5 dBi over 8-12 GHz. Moreover, the comparison of the prototyped antenna with its counterpart dielectric lens antenna in the literature has indicated that the proposed method is more efficient, more beneficial, and has a lower cost. |
| Author(s): | A. Belen, E. Tetik |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 2003 KB |
| Title: | Slot Filling Factor Calculation and Electromagnetic Performance of Single Phase Electrically Excited Flux Switching Motors |
| Abstract: | For variable speed applications, flux controlling capability of electrically excited flux switching motors (EEFSMs) attract researchers’ attention. However, low copper slot filling factor of the EEFSM with standard stator slot vitiates the electromagnetic performance and efficiency. This paper has proposed a new Octane Modular Stator (OMS) EEFSM model that has pentagonal stator slot and high copper slot filling factor. Copper slot filling factor is deliberated analytically for the proposed model and designs with standard stator slots, i.e., trapezoidal and rectangular. Electromagnetic performance of the OMS, Rectangular Stator Slot (RSS) and Trapezoidal Stator Slot (TSS) EEFSM designs are evaluated by finite element analysis (FEA) through JMAG v18.1 FEA solver. The proposed OMS EEFSM model has 9% higher copper slot filling factor in comparison with standard stator slots designs under same geometric parameters. The high copper slot filling factor of the proposed OMS EEFSM model has improved performance in term of low electric and magnetic loading. |
| Author(s): | B. Khan, F. Khan, W. Ullah, M. Umair, S. Hussain |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 2763 KB |
| Title: | CPW-Fed Wide Band Micro-machined Fractal Antenna with Band-notched Function |
| Abstract: | In this paper, a straightforward yet effective design methodology to design wideband antenna with band notched characteristics has been proposed. Sierpinski carpet fractal geometry has been used to realize the antenna structure. Co-planar waveguide feed is used with a novel structure to achieve larger impedance bandwidth and band notching characteristics. Proposed antenna is designed using High Frequency Structure Simulator (HFSS) on a low cost FR4 substrate (ɛr=4.4) which resonates at three frequencies 1.51 GHz (1.19-2.06GHz), 6.53 GHz and 8.99 GHz (4.44-9.54 GHz) while a band is notched at 10.46 GHz (9.32-11.92 GHz). The proposed antenna has an electrical dimension of 0.36 λm× 0.24 λm, here λm is the wavelength with respect to lowest resonating frequency of the antenna. The resonating and radiation characteristics of the antenna are verified experimentally. Further, investigations are made to achieve easy integration of the antenna to the monolithic microwave integrated circuits. For that the antenna has been designed on micro-machined high index Silicon substrate which improve matching and gain of the antenna. The results of the micro-machined Sierpinski carpet fractal antenna are highly convincing over the conventional FR4 based antenna. |
| Author(s): | A. Kumar, A. P. S. Pharwaha |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1541 KB |
| Title: | Compact Multi-Mode Filtering Power Divider with High Selectivity, Improved Stopband and In-band Isolation |
| Abstract: | This letter presents a new compact mult-imode filtering power divider (FPD) design based on co-shared FPD topology with sharp frequency selectivity, improved out-of-band harmonic rejection and port-to-port isolation. Power splitting and quasi-elliptic filtering functions are achieved by masterly integrating only one triple-mode resonator. By loading different open-circuited stubs at the input/output ports, multiple additional transmission zeros (TZs) are generated at both lower and upper stopband, resulting in an improved stopband performance. Meanwhile, a better port-to-port isolation is obtained by adopting frequency-dependent resistor-capacitor parallel isolation network. The proposed multi-mode FPD design stands out from those in the literature by both nice operation performance and compact topology with only one resonator. For demonstration purposes, one triple-mode FPD prototype and its improved one are implemented, respectively. Measured results exhibit the superiority of the FPD design. |
| Author(s): | Z. Qian, Y. Chen, C. Feng, W. Wang |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1693 KB |
| Title: | Analysis of Crosstalk Problem in Multi-Twisted Bundle of Multi-Twisted Wire Based on BSAS-BP Neural Network Algorithm and Multilayer Transposition Method |
| Abstract: | Twisted wire used in complex systems has the ability to reduce electromagnetic interference, but crosstalk within the wire is not easy to obtain. This paper proposes a method to predict the crosstalk of multi-twisted bundle of multi-twisted wire (MTB-MTW). A neural network algorithm based on back propagation optimized by the beetle swarm antennae search method (BSAS-BPNN) is introduced to mathematically describe the relationship between the twist angle of the wire harness and the per-unit-length (p.u.l) parameter matrix. Considering the symmetry of the model, the relationship between the unresolved angle of the BSAS-BPNN algorithm and the p.u.l parameter matrix is processed by using the multilayer transposition method. Based on the idea of the cascade method and the finite-difference time-domain (FDTD) algorithm in Implicit-Wendroff format, the crosstalk of the wire is obtained. Numerical experiments and simulation results show that the new method proposed in this paper has better accuracy for the prediction of the model. The new method can be generalized to the MTB-MTW model with any number of wires. All theories provide preliminary theoretical basis for electromagnetic compatibility (EMC) design of high-band circuits. |
| Author(s): | C. Huang, Y. Zhao, W. Yan, Q. Liu, J. Zhou, Z. Meng, A. Mueed |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1896 KB |
| Title: | Omega-Shaped Tag Antenna with Inductively-Coupled Feeding Using U-Shaped Stepped-Impedance Resonators for RFID Applications |
| Abstract: | This study proposes a new omega-shaped tag antenna with inductively-coupled feeding (ICF) using U-shaped stepped- impedance resonators (SIRs). It aims at improving the performance of the tag antennas for Radio Frequency Identification (RFID) applications. The radiating body of the antenna is fed using two mirroring symmetrical U-shaped SIRs. This antenna is a simpler alternative for the existing antennas that match the impedance of the antenna to the chip impedance effectively applying varied reinforcement of the equivalent inductance of the radiating structure. In addition to the use of an omega-shaped structure, the proposed feeding technique boosts performance of the antenna impedance, dimensions, and peak gain. The measured size of the antenna was 50×55.55×1.6 mm3. It attains a peak gain of 1.8 dBi and radiation efficiency higher than 85% at its operating frequency. The experimental results revealed that this tag antenna has the characteristic of good impedance matching within the frequency range of 900-940 MHz, corresponding to a better power reflection coefficient of -3 dB. Comparison between the measured and simulated results verified that the proposed feeding method is capable to improve overall performance of RFID tag antennas. |
| Author(s): | A. R. H. Alhawari, A. H. M. Almawgani, H. Alghamdi, A. T. Hindi, T. Saeidi, A. Ismail |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1877 KB |
| Title: | Scattering Characteristic Extraction and Recovery for Multiple Targets Based on Time Frequency Analysis |
| Abstract: | The multi-target scattering field consists of the scattering fields of each target, but it is difficult to know the scattering characteristics of the specific target from the total scattering field. However, the scattering characteristics of single target embedded in the total scattered field have important research significance for target recognition and detection. In this paper, a method is proposed to extract and recover each target’s scattering characteristics from the total scattering field of multiple targets. The theoretical basis of the method is that the scattering echoes corresponding to different targets reach the receiver at different time. We acquire the total scattering field at first. Then, we perform the signal processing with time-frequency analysis to obtain the arrival time of different scattering echoes. According to the time slot difference, the time domain signal of each target can be extracted to recover its scattering field. Several examples validate the proposed method. |
| Author(s): | X. Liu, J. Li, Y. Zhu, S. Zhang |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1915 KB |
| Title: | Wideband Microstrip Patch Antennas with Transverse Electric Modes |
| Abstract: | A wideband microstrip patch antenna, exciting the fundamental transverse electric (TE) mode, is investigated. The excitation of the TE mode is facilitated through replacing both of the patch and ground plane of a conventional microstrip antenna with artificial magnetic conductors (AMC), consisting of unipolar compact photonic bandgap (UC-PBG) unit cells. The AMC patch and the ground plane of this antenna behave as magnetic conductors within the bandgap region of the unit cells. Similar to conventional patch antennas, it is shown that by cutting a U-shaped slot in the AMC patch, wideband characteristics are realized. The antenna shows a 40% impedance bandwidth and operates at the TE10 mode. Moreover, the width of the patch is 1.75 times smaller than its length, reducing the overall size of the antenna by about 60%, compared with the conventional U-slot PEC antenna supporting the transverse magnetic (TM) mode. |
| Author(s): | T. Mitha, M. Pour |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1356 KB |
| Title: | Design of a New Wideband Single-Layer Reflective Metasurface Unit Cell for 5G-Communication |
| Abstract: | In this paper, a new single layer subwavelength unit cell is designed for reflective metasurface at 28 GHz suitable for 5G communication with linear phase response and wide bandwidth characteristics. The proposed unit cell is analyzed through Floquet mode analysis for two different sizes. The unit cell with conventional half-wavelength size (HWS) has achieved 590° phase range while the unit cell with a subwavelength size (SWS) of λ/3 has achieved exactly 360° phase range. It is observed that the unit cell with SWS provides linear phase response as compared to the unit cell with HWS. Since non-linear phase response may produce more phase errors on wide range of frequencies, so SWS unit cell with 360° phase range and linear phase response is more suitable option for wideband operation as compared to conventional HWS unit cell with more than 360° phase range. |
| Author(s): | M. A. Qureshi, A. Aziz, A. Amin, H. F. Rasool, F. Hayat |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 8 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1476 KB |