ACES Publication Search
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| Title: | ACES Journal January 2022 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1968 KB |
| Title: | ACES Journal January 2022 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 155 KB |
| Title: | ACES Journal January 2022 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 24519 KB |
| Title: | An Adaptive and Highly Accurate FDTD Mesh Generation Technique for Objects with Complex Edge Structures |
| Abstract: | In this paper, a triangular facets based, highly accurate, and adaptive finite-difference time-domain (FDTD) mesh generation technique is presented. There are two innovations in the implementation of this technique. One is adaptive mesh lines placement method. The mesh lines are automatically set to be dense where the object has fine structure and sparse where the object has rough structure based on the incremental placement of the triangular mesh vertices. The other is ray column tracing method. Ray columns in the normal direction of the coordinate plane are employed to intersect the surface facets to make the mesh generation results highly accurate. The generating FDTD results of the numerical examples show that the proposed technique can well-restore objects with complex edge structures. The simulation results are in good agreement with the theoretical results. |
| Author(s): | C. Mou, J. Chen |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 7117 KB |
| Title: | Newton-ADE-FDTD Method for Oblique Incident Magnetized Time-varying Plasma |
| Abstract: | In this paper, the Newtonian equation of motion describing the movement of electrons when electromagnetic waves propagate in a magnetized plasma is combined with the traditional auxiliary differential equation finite difference time domain (ADE-FDTD) method. The FDTD iterative formulas of transverse magnetic (TM) wave and transverse electric (TE) wave of the electromagnetic wave obliquely incident on the magnetized time-varying plasma plate are derived. The biggest difference between this method and the ordinary ADE-FDTD algorithm is the addition of the logarithmic derivative of the time-varying plasma electron density to calculate the current density, which is called the Newton-ADE-FDTD method. Through Example 1, the reflection coefficient of electromagnetic wave incident on the magnetization time-varying plasma plate was calculated, and the correctness of the improved algorithm was verified. At the same time, the Newton-ADE-FDTD algorithm is used to calculate the reflection coefficient of electromagnetic waves incident on the magnetized plasma-dielectric photonic crystal. The results show that different incident angles have a greater impact on the reflection coefficients of left-handed circularly polarized wave (LCP) and right-handed circularly polarized wave (RCP). |
| Author(s): | H. Liu, L.-X. Yang, W. Chen, Y. Bo |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 2648 KB |
| Title: | Spatial Processing Using High-Fidelity Models of Dual-Polarization Antenna Elements |
| Abstract: | This paper generalizes a recent improvement to a traditional spatial-processing algorithm to optimally use body-mounted arrays of dual-polarization radio-frequency antenna elements rather than singlepolarization antenna elements. The paper’s generalized algorithm exploits high-fidelity far-field gain and polarization data, generated most practically by a computational electromagnetic solver (CES), to characterize the antenna array’s individual dual-polarization elements. Using this characterization and that of the desired and undesired communication nodes’ antennas, the generalized algorithm determines the array’s optimal weights. The subsequent application of a CES to a practical scenario, in which an optimally weighted array of dualpolarization antenna elements is mounted on a representative body, demonstrates the generalized algorithm’s exceptional spatial-processing performance. |
| Author(s): | J. N. Spitzmiller, S. Y. Choi |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 32029 KB |
| Title: | Surrogate-Based Design Optimization of Multi-Band Antenna |
| Abstract: | In this work, design optimization process of a multi-band antenna via the use of artificial neural network (ANN) based surrogate model and meta-heuristic optimizers are studied. For this mean, first, by using Latin-Hyper cube sampling method, a data set based on 3D full wave electromagnetic (EM) simulator is generated to train an ANN-based model. By using the ANNbased surrogate model and a meta-heuristic optimizer invasive weed optimization (IWO), design optimization of a multi-band antenna for (1) 2.4–3.6 GHz for ISM, LTE, and 5G sub-frequencies, and (2) 9–10 GHz for X-band applications is aimed. The obtained results are compared with the measured and simulated results of 3D EM simulation tool. Results show that the proposed methodology provides a computationally efficient design optimization process for design optimization of multiband antennas. |
| Author(s): | A. Belen, O. Tari, P. Mahouti, M. A. Belen, A. Caliskan |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 4430 KB |
| Title: | A Wide-Beam Metasurface Antenna Using Pattern Combination of Characteristic Modes |
| Abstract: | In this paper, a new method based on characteristic mode analysis for designing wide-beam antennas is proposed. According to theory of characteristic modes, the total radiation pattern is the linear combination of modal currents. The phase of the excitation coefficient is demonstrated to be the characteristic angle. To get a wide-beam pattern, a fundamental mode and an even mode are selected to be excited and combined. The method is verified by the proposed antenna. First, two modes are selected based on characteristic mode analysis. Then the modes are excited separately using different feeding networks. Lastly, a 1-to-3 power divider is proposed to combine the feeding networks. The proposed antenna has a 3-dB beamwidth of over 200° in both 45° and 135° planes. The results have shown that the proposed antenna is suitable for a wide range of detection applications. |
| Author(s): | S. Zhao, X. Li, Y. Chen, W. Zhao, Z. Qi |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 2375 KB |
| Title: | Modeling the Performance Impact of Anisotropic Unit Cells Used in Additively Manufactured Luneburg Lenses |
| Abstract: | Additively manufactured graded index lenses, such as the Luneburg lens, often result in some degree of uniaxial anisotropy in the effective permittivity distribution. A uniaxially anisotropic Luneburg lens modifies the polarization state of an incident electromagnetic field, thus giving rise to a polarization mismatch at the receiving antenna. Using 3D finite element simulation, the lens focal point polarization is analyzed and a model that fits the simulation data is created. The model allows prediction of polarization mismatch loss given any incident field and any receiving antenna polarization without resorting to further time-consuming simulations. |
| Author(s): | B. F. LaRocca, M. S. Mirotznik |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 582 KB |
| Title: | Electronically Steerable Parasitic Patches for Dual-Polarization Reconfigurable Antenna Using Varactors |
| Abstract: | This paper presents a dual-polarized reconfigurable antenna loading electronically steerable parasitic patches. The proposed dual-polarized antenna is surrounded by four parasitic patches each of which is mounted by two varactor diodes on the ground. By tuning the varactors, continuous two-dimensional beamsteering can be achieved for each of the polarization. A prototype of the proposed antenna is fabricated and measured. Excellent agreement between the simulated and measured results is observed. It is observed that the maximum beam-scanning angles in E-plane and H-plane are greater than ±25°, which is suitable for 5G base station applications. |
| Author(s): | Y. Mu, J. Han, D. Xia, X. Ma, H. Liu, L. Li |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 3337 KB |
| Title: | Compact Cauliflower-Shaped Antenna for Ultra-Wideband Applications |
| Abstract: | A compact coplanar waveguide (CPW) fed cauliflower-shaped antenna is presented and discussed in this paper. To extend the impedance bandwidth and to improve the impedance matching, fractal geometry having a cauliflower shape is introduced along the edges of the radiator. To validate the simulated results by experimental ones, a prototype of the designed antenna was fabricated on the RO-4350B substrate having a compact size of 0.3623λₒ × 0.41λₒ × 0.01524λₒ at 3 GHz. An Agilent 8722ES vector network was used for the reflection coefficient measurement revealing that the – 10 dB bandwidth of the fabricated antenna offers an impedance bandwidth of 113% extending from 3.05 to 10.96 GHz. Besides, the antenna’s radiation patterns are measured in an anechoic chamber showing consistent radiation patterns characteristic over the entire working band. Furthermore, the proposed antenna has a peak gain of around 6 dBi and an average radiation efficiency almost over 90% across the entire operating band. Thus, the proposed antenna could be useful in many modern ultra-wideband (UWB) communication systems. |
| Author(s): | B. Guenad, A. Chaabane, D. Aissaoui, A. Bouacha, T. A. Denidni |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 609 KB |
| Title: | A Broadband Dual-Polarized Magneto-Electric Dipole Antenna Element for Low-Frequency Astronomical Arrays |
| Abstract: | This paper presents simulation-based design and analysis of a broadband dual-polarized magnetoelectric dipole antenna element that can be used to construct VHF astronomical antenna arrays. The antenna consists of two pairs of radiating structures, each fed by a G-shaped feeding section. The feeding section and radiating parts are physically disconnected from each other. The antenna is evaluated by simulation, and its ─10 dB impedance matching bandwidth ranges from 115 to 340 MHz. The maximum gain of the antenna is about 8 dB over the operating range. Isolation of about 20 dB is observed between the two input ports. |
| Author(s): | A. Murugesan, D. Natarajan, S. Abishek, V. Lingasamy, K. Hariharan, K. T. Selvan |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 6923 KB |
| Title: | Design and Optimization of a Wideband Rectangular TEM Device for Cell Experiments |
| Abstract: | The influence of electromagnetic waves on living things has been of great concern in recent years. Traditionally, electromagnetic radiation device for cell experiments has a narrow frequency range and small radiation space. In this paper, a DC to 5.2-GHz rectangular transverse electromagnetic (TEM) device for cell experiments is proposed. The novelty of this research lies in the wide frequency range and sufficient radiation space under the condition of ensuring the transmission performance. The rectangular device is composed of a closed rectangular coaxial transmission line, tapered transition regions, inner plate structure, and dielectric supports. After simulation, optimization, and measurement, both the results of the simulated and measured studies indicate that reflection coefficient S11 is below –10 dB and transmission coefficient S21 is nearly 0 dB. It is demonstrated that the device has a good transmission performance from DC to 5.2 GHz, which meets the requirement for wideband cell radiation experiments. The proposed rectangular device is a good candidate for cell radiation experiment device. |
| Author(s): | S. Wang, S. Fang, P. Chen |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 931 KB |
| Title: | Design of Electronically Controlled Filter Power Divider Based on Liquid Crystal |
| Abstract: | The wireless communication system is one of the most important facilities of fuel cell hybrid power tram (FCHPT), which provides a strong guarantee for efficient and safe operation. As an indispensable part of the RF front-end of the transmitter and receiver, the miniaturization and high-performance trends of filtering power dividers are becoming evident. Based on the principle of filter power divider, a capacitor loaded power divider filter is designed and fabricated in this paper. The center frequency of the designed power divider filter is 30 GHz, the return loss S11 is less than –10 dB in the range from 29.2 to 31.6 GHz, and the insertion losses S21 and S31 are less than 5.3 dB. The frequency shift of 1.8 GHz can be achieved by changing the dielectric constant of the liquid crystal with an applied bias voltage, which can be used in millimeter wave communication system. |
| Author(s): | W. Shen, Y. Han, W. Chen, D. Jiang, S. Luo, T. Bai |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 24166 KB |
| Title: | Research and Design of Radar System for Respiratory and Heartbeat Signal Detection |
| Abstract: | The respiratory and heartbeat signals can accurately reflect the health status of the tester, which is of great clinical significance. Compared with the traditional contact detection method, the non-contact radar detection method does not require the tester to wear any sensor equipment and will not cause any discomfort to the tester. The frequency modulated continuous wave (FMCW) radar has the characteristics of simple structure, high resolution, strong stability, and low transmission power and is used for the detection of respiratory and heartbeat signals. This paper designs a low-power, low-cost respiratory, and heartbeat signal detection system based on FMCW radar. In addition, the variational modal decomposition (VMD) method is used to separate respiration and heartbeat signals to obtain accurate respiration and heartbeat rates. The results show that the radar system for detecting respiratory and heartbeat signals has high detection accuracy. |
| Author(s): | Z. Xia, X. Wang, X. Li, Y. Xu |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 8818 KB |
| Title: | Simulation of High Frequency Twisted Pair Cable Using DDM-FEM Hybrid Algorithm |
| Abstract: | In this article, an efficient domain decomposition method finite element method (DDM-FEM) algorithm is presented for the lossy twisted pair cable. In harsh environment and anti-interface ability, cables need high toughness, noise immunity, and extraordinary strength. We, in this paper, simulate a physical model of twisted pair cable and apply a hybrid solver of DDM-FEM to analyze these problems by compression and approximation of matrix-vector product. The DDMFEM solver along with matrix compression is used to compute the RLCG, propagation constant in the twisted pair cable, and to reduce the computational time and memory size. Therefore, in the proposed algorithm, the complexities of the system become linear. The study compares the calculated results with the existing standard to verify the effectiveness of the proposed algorithm. |
| Author(s): | S. Khan, Y. Zhao, Y. Wei, A. Mueed, Z. Ullah, A. Khan |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 673 KB |
| Title: | Eddy Current Microsensor Dedicated to the Nondestructive Testing of Conductive Plates |
| Abstract: | To ensure the safety of transportation and prevent accidents, nondestructive testing by Eddy current (EC) is proposed to check the conditions of industrial parts. EC sensors are used for the inspection of defects in conductive parts using coil fed by alternative current. These sensors are sensitive to defects, easy to implement, and robust for industrial applications. In order to satisfy the requirement for both reliability and speed during inspection operations, innovative EC sensors that can provide higher sensitivity, better spatial resolution, and more information about the defect characteristics, such as microsensors, are developed. The miniaturization of these sensors’ coils conforms the sensor for micro-defects in critical parts and in complex materials. In this paper, a microsensor dedicated to EC application is studied and characterized to identify the coil parameters and to optimize the geometry of the probe. An approach for the modeling of microsensor dedicated to EC nondestructive applications is proposed. The moving band finite element method is implemented for this purpose to take into account the movement of the sensor and to simplify the modeling of EC testing configurations that use this kind of sensor. Experimental validations were conducted on a nickel-based alloy specimen. The real and imaginary parts of the impedance at every position of the sensor computed by experiments and simulations were consistent with each other. Simulation results proved that the sensor was capable of detecting microdefects with a size starting from 0.1 mm under the optimal excitation frequency of 0.8 MHz. It is not only sensitive to micro-cracks, but also it distinguishes the different crack sizes (length, width, and depth). |
| Author(s): | C. Aber, A. Hamid, M. Elchikh, T. Lebey |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 2451 KB |
| Title: | The Comparison of EMF Monitoring Campaigns in Vicinity of Power Distribution Facilities |
| Abstract: | Monitoring of electromagnetic field (EMF) near power distribution facilities, both in the low- and the high-frequency ranges, has become highly demanded in recent years. The reason lies in the accumulated concerns on public health, which is mostly caused by the evolution of electric power and communication infrastructure, in and around the power substations, as well as their closeness to residential areas. In this paper, the initial comparative analysis of the EMF monitoring results of three one-day campaigns, in 2015, 2018 and 2020, performed in the vicinity of the Serbian highpower distribution substation “Novi Sad 7”, is presented. The overall EMF levels in all campaigns comply with the reference levels prescribed by the Serbian legislation, including some new EMF sources which were detected in 2018 and 2020. Likewise, the used continuous monitoring has demonstrated suitability to systematically address EMF fluctuation on daily basis, as well as corresponding concerns on EMF exposure. |
| Author(s): | G. S. Nedic, N. M. Djuric, D. R. Kljajic |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 1 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 21425 KB |