ACES Publication Search
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| Title: | ACES Journal March 2022 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1968 KB |
| Title: | ACES Journal March 2022 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 403 KB |
| Title: | ACES Journal March 2022 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 22243 KB |
| Title: | Women’s History Month Special Article: Interview with “Professor Ozlem Kilic” |
| Abstract: | The month of March is Women’s History Month. We all have heard and know that only a small percentage of electrical engineers are female. This percentage is even smaller for those that are experts in the field of applied computational electromagnetics. In this article, we are focusing on Dr. Ozlem Kilic, one of the well-known and established intellectuals in the field of computational electromagnetics. Dr. Kilic not only has been a role model for young students as an excellent researcher, a technical leader, and a prolific writer in this field, but also she has extensive experience in teaching and has taken many academic administration roles. |
| Author(s): | S. Noghanian |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 398 KB |
| Title: | Generalized Finite Difference Method for Solving Waveguide Eigenvalue Problems |
| Abstract: | The generalized finite difference method (GFDM) is a meshless method that has become popular in recent years. The basic theory underlying GFDM is to expand the point cluster function value at the center node by Taylor’s formula and then obtain the best linear combinations of these function values to represent the derivative at the central node by the least square fitting technique. Subsequently, the minimized weighted error between the approximated value and the accurate value is obtained. This paper establishes the general steps for solving waveguide eigenvalue problems with GFDM. Excellent performance is shown by comparing the proposed method and other common solutions. The robustness of the proposed method is verified by calculating the cutoff wavenumbers of typical waveguides and the eccentric circular waveguide in different modes. |
| Author(s): | H. Xu, Y. Bao |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 501 KB |
| Title: | Pattern Reconstruction for Antennas with Characteristic Mode Analysis and Surrogate Model |
| Abstract: | A novel approach is applied to obtain a desired pattern for a perfect electric plate with two ports. The location of ports is decided with the help of characteristic mode analysis. Two capacitive coupling elements are chosen to be used as excitation. The magnitude and phase of each excitation are obtained by the Bayesian inference method. In order to avoid complexity of computational design, a surrogate model, which is based on polynomial chaos expansion, is built. The surrogate model is ensured to mimic the computational model over 90%. Then, the desired pattern is compared with the synthesized one, and it is seen that the two patterns fit very well to each other and the correlation between the two patterns is above 0.9. |
| Author(s): | A. Yilmaz, H. Acikgoz, A. E. El-Rouby |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1116 KB |
| Title: | Gain-Enhanced Wideband Circularly Polarized Antenna with a Non-Uniform Metamaterial Reflector |
| Abstract: | In this paper, a gain-enhanced wideband circularly polarized (CP) antenna with a non-uniform metamaterial (NUM) reflector is presented, which is composed of a modified wide S-shaped slot antenna and a NUM reflector. To achieve a wideband CP operation, a modified S-shaped slot is fed by an L-shaped microstrip feedline that ends with a triangular patch to improve axial ratio (AR) bandwidth and impedance bandwidth. A NUM reflector composed of rectangular metal units with different sizes is employed and its units are unevenly distributed. The proposed CP antenna is designed, fabricated, and measured. The measured results show that the impedance bandwidth covers 3.0-6.0 GHz (66.7%) and a 3-dB AR bandwidth covers 3.1-5.6 GHz (57.4%). A peak gain of 6.0 dBi is obtained at 3.8 GHz by using the reflector. The advantages of the proposed antenna are the simple structure, high gain, and broad CP bandwidth. |
| Author(s): | B. Qiu, Y. Xia, Y. Li |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1400 KB |
| Title: | Cavity-Backed Slot V2X Antenna for Automotive Applications |
| Abstract: | In this work, a cavity-backed slot antenna has been designed to cover vehicle-to-everything (V2X) frequencies (5:85–5:925 GHz). The antenna is made to be easily integrated in a vehicle windshield or rear mirror. The cavity-backed slot antenna does not require a ground plane to sit on which makes it an ideal model for below horizon performance. Antenna simulation has been done using high-frequency structure simulator (HFSS) and then on-foam and on vehicle’s windshield measurements have been carried out inside an anechoic chamber. The proposed antenna achieved a linear average gain (LAG) above 2.5 dBi in the targeted V2X elevation and azimuth angles with better than 15 dB return loss. The antenna performance has been reported in terms of reflection coefficient, surface current density, radiation pattern, LAG, and efficiency. |
| Author(s): | M. O. Khalifa, A. M. Yacoub, D. N. Aloi |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 920 KB |
| Title: | A Wrench-Shaped UWB Antenna Yielding Dual Notched Bands for WLAN Application |
| Abstract: | A wrench-shaped ultrawideband (UWB) antenna with dual notched bands is proposed and investigated. The antenna has a wrench-shaped patch and two T-shaped slots on the ground, realizing the required UWB band. To achieve the dual notched band characteristics in upper and lower wireless local area network (WLAN) bands, an Omega-shaped slot is etched on the feedline and a novel composite right/left-handed electromagnetic bandgap (CRLH-EBG) structure is built on the ground. Measured results present an operating frequency band from 3.04 to 11.4 GHz, with two notched bands of 5.1–5.4 GHz (uplink of WLAN band) and 5.7–5.98 GHz (downlink of WLAN band), respectively. Both measured and simulated results of the proposed antenna are exhibited, promising that the antenna applies to UWB applications and can precisely overcome WLAN interference. |
| Author(s): | T. Ding, M. Wang, J. Guo, L. Zhang, J. Xiao |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 12161 KB |
| Title: | Design and Development of Substrate Integrated Waveguide Based Filtenna for X Band Application |
| Abstract: | In this paper, substrate integrated waveguide based filtenna operating at X band is proposed. The model is designed on a low-loss dielectric substrate having a thickness of 1.6 mm and comprises shorting vias along two edges of the substrate walls. To realize a bandpass filter, secondary shorting vias are placed close to primary shorting vias. The dimension and position of the vias are carefully analyzed for X band frequencies. The model is fabricated on Roger RT/duroid 5880 and the performance characteristics are measured. The proposed model achieves significant impedance characteristics with wider bandwidth in the X band. The model also achieves a maximum gain of 7.46 dBi in the operating band, thus making it suitable for X band applications. |
| Author(s): | G. S. A. G. Vimala, V. R. Prakash, A. Akilandeswari, D. Sungeetha, M. Saravanan |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 6358 KB |
| Title: | Reduced Modeling for Electromagnetic Coupling to Randomly Wiring Automotive Cable Harness |
| Abstract: | The random wiring of automotive cable harness makes electromagnetic compatibility (EMC) analysis of the whole vehicle very complicated; thus, this paper proposes a simplification modeling technique to model the electromagnetic (EM) illumination on automotive cable harness. First, the stochastic process theory is applied to determine the cable route in a randomly bundling way. Then, the inductance and capacitance parameters of the cable harness at different location are established according to multiconductor transmission lines network (MTLN) theory. On this basis, the simplification modeling technique is developed to generate the electrical and geometrical parameters of the equivalent cable model. Finally, a model of shielded nine-conductor with randomly twisted and a model of unshielded nineconductor with stochastic wiring in the vehicle are performed to validate the proposed approach by full-wave simulation. The presented method simplifies the complexity of modeling the complete cable harness significantly with a good accuracy. |
| Author(s): | P. Xiao, J. Li, C. Zhang, J. Li, G. Li |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 2516 KB |
| Title: | Low-RCS Surface Design Based on Lossy Metagratings |
| Abstract: | A design method based on the lossy metagrating for radar cross section (RCS) reduction is proposed in this paper. According to the mechanism of the RCS reduction, the lossy metagrating with different loaded lines per supercell is studied and it is also incorporated into the metasurface to reduce RCS. The embedded metagrating provides an additional low-RCS band and it has a small effect on the original band of the metasurface. Numerical results show that the metagrating reduces RCS of the surface effectively. |
| Author(s): | K. Wang, W. Shao, H. Li, B.-Z. Wang |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 2435 KB |
| Title: | A Novel Design of Microwave Absorbers Based on Multilayered Composite Materials for Reduction of Radar Cross Section |
| Abstract: | Reduction of radar cross section (RCS) for targets can be achieved by different approaches and coating absorbing materials at the surfaces of targets is one of widely used methods because of its flexibility and good effect. In the work, we put forward a novel method of reducing the RCS based on the design of multilayer composite absorbing materials. The transmission line theory and particle swarm optimization (PSO) are used to guide the design and analysis, and two kinds of designs, i.e., Type IV and Type VII, are selected finally. Simulation experiments show that the designs are insensitive to the incident angles and polarizations of incident EM wave, which is required for being coated at the surfaces of real objects. Also, the designed absorbing materials are very thin and have an ultra-wide frequency band. The bandwidth of Type-IV design can reach 14.63 GHz, ranging from 3.37 to 18.0 GHz, while Type-VII design can cover the frequency range from 2.0 to 18.0 GHz, which represents the major part of radar’s frequency range. The designed absorbing materials are coated at the surface of a perfectly-electric-conducting (PEC) cylinder to validate the effectiveness of the materials, and good results have been obtained. |
| Author(s): | H. Q. Zheng, Y. T. Huang, M. S. Tong |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 2123 KB |
| Title: | Satellite Communication Effectiveness Evaluation Based on Distributed Multi-Node Receptions |
| Abstract: | Satellite-communication effectiveness evaluation is one of the key issues in the field of satellite communication links for satellite operation, maintenance, and emergency communication. However, conventional model-based calculation methods require accurate meteorological parameters, thus not applicable to practical engineering problems. In this paper, a hybrid method, combing direct calculation and equilibrium approximation, is proposed to evaluate the effectiveness of a satellite communication system, with distributed multi-node receiver stations on the earth. Especially, the proposed equilibrium approximation approach is resilient to meteorological factors. Field tests corroborate the feasibility of this new method for real-world problems. |
| Author(s): | J. Gu, D. Zhou, H. Deng, B. Huang, Q. Peng , D. Zhang, D. Lv, Q. Liu |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 2283 KB |
| Title: | Shape Optimization of the Momentum Ring Cross Section for Satellite Attitude Control Based on Magnetohydrodynamics |
| Abstract: | Compared with the traditional actuator, the fluid momentum controller actuator based on magnetohydrodynamics (MHD) has some unique advantages and characteristics. In this paper, a method is proposed for the shape optimization of fluid momentum ring cross section. Based on the engineering situation, this article proposes a mathematical model of angular momentum that can be used for analytical calculations. Second, the two shapes obtained are unified and mathematically expressed in terms of maximum power and minimum resistance, respectively. Finally, the particle swarm algorithm is used to optimize the parameters of the proposed shape in combination with finite element method (FEM). Compared with the common rectangular section scheme, the attitude adjustment performance of fluid momentum ring can be effectively improved. Specifically, for the same area of cross section, the fluid momentum rings with the proposed shape provide the angular momentum values that exceed those of the rectangular shape by 14%-17% for the cases considered. This method avoids the huge computation of computational fluid dynamics and multidisciplinary topology optimization. |
| Author(s): | Y. Gu, Q. Liang, S. Wang, A. Zhou, C. Liu |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1525 KB |
| Title: | Speed Interference Suppression for PD Radar Based on Adaptive Dictionary |
| Abstract: | Random pulse initial phase (RPIP) signal is a kind of agility waveform which is commonly used in pulse Doppler (PD) radar. Although RPIP has the merit of restraining velocity deception jamming effectively, its efficiency is restricted under the condition of strong interference. To make the RPIP signal fully play the anti-jamming performance, this paper proposed a speed interference suppression method based on adaptive dictionar that separates the target echo from the strong jamming signal with good sparsity. First, the prior knowledge of strong interference signal is obtained by the technique of peak detection which is combined with the dual channel processing. Second, the quasi-Karhunen-Loeve transform (Q-KLT) basis of interference signal is constructed based on the prior knowledge, and the approximate Q-KLT basis of target signal is constructed by the way of dictionary learning, and those signals can be obtained from the adaptive dictionary by the algorithm of base tracking (BP). Finally, the effectiveness of the proposed method is verified by numerical simulation, which proves that the method can ensure a lower Doppler sidelobe in the strong interference scene, which confirmed that it has a good antivelocity deception performance. |
| Author(s): | Z. Du, L. Yu, J. Zhang, M. Cai, T. Jiang |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 23663 KB |
| Title: | Evaluation of Pipe Cracks Based on Cloud Contour of Three-Dimensional Induced Eddy Current Field |
| Abstract: | Considering the problem of non-destructive testing and quantitative evaluation of metal materials, an electromagnetic method for visual and quantitative evaluation of surface defects on metal pipe is proposed in this paper. The dual-excitation probe with the combination of arc-shaped and rectangular coils is constructed. The eddy current magnetic field on the outer cylindrical surface of metal pipe is calculated and analyzed by COMSOL Multiphysics finite-element software, and then the influences of crack location and geometric parameters on three-dimensional magnetic field characteristics are studied. The results show that the cloud contours constructed by the magnetic induction intensity norm can accurately evaluate the information such as the location, size, depth, and orientation of the surface crack. In addition, the cloud contours constructed separately by the magnetic induction intensity in three directions can be used for auxiliary judgment to further determine the relevant important parameters of the surface crack to be tested. |
| Author(s): | F. Jiang, L. Tao, L. Geng, T. Xu |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 3 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 415 KB |