ACES Publication Search
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| Title: | ACES Journal December 2020 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 2215 KB |
| Title: | ACES Journal December 2020 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 8808 KB |
| Title: | ACES Journal December 2020 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 26717 KB |
| Title: | A Comparative Study of the Computation Efficiency of a GPU-Based Ray Launching Algorithm for UAV-Assisted Wireless Communications |
| Abstract: | Graphics Processing Units (GPU), have opened up new opportunities for speeding up generalpurpose parallel computing applications. In this paper, we present the computation efficiency in terms of time performances of a novel ray launching field prediction algorithm which relies on NVIDIA GPUs and its Compute Unified Device Architecture (CUDA). The software tool assesses the propagation losses between a wireless transmitter - carried by an Unmanned Air Vehicle (UAV) - over a 3D urban environment. Together with other effective features, the software tool is shown to reduce by several orders of magnitude the computation time of simulations. Performances and cost-benefit analysis of three different NVIDIA GPU configurations are thus investigated over three different urban scenarios, taken as test-cases for Air-to-Ground (A2G) communications for 5G applications and beyond. |
| Author(s): | M. J. Arpaio, E. M. Vitucci, F. Fuschini |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1216 KB |
| Title: | Constitutive Parameter Optimization Method of Obliquely Incident Reflectivity for Conformal PML |
| Abstract: | The conformal perfectly matched layer (PML), i.e., an efficient absorbing boundary condition, is commonly employed to address the open-field scattering problem of electromagnetic wave. To develope a conformal PML exhibiting a significant absorption effect and small reflection error, the present study proposes the constitutive parameter optimization method of obliquely incident reflectivity in terms of the conformal PML. First, the recurrence formula of obliquely incident reflectivity is derived. Subsequently, by the sensitivity analysis of constitutive parameters, the major optimal design variables are determined for the conformal PML. Lastly, with the reflectivity of the conformal PML as the optimization target, this study adopts the genetic algorithm (GA), simulated annealing algorithm (SA) and particle swarm optimization algorithm (PSO) to optimize the constitutive parameters of the conformal PML. As revealed from the results, the optimization method is capable of significantly reducing the reflection error and applying to the parameter design of conformal PML. |
| Author(s): | Y. J. Zhang, X. F. Deng, X. H. Zhang |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1668 KB |
| Title: | Optimization Design of Electromagnetic Devices Using an Enhanced Salp Swarm Algorithm |
| Abstract: | An Enhanced version of the Salp Swarm Algorithm (SSA) referred to as (ESSA) is proposed in this paper for the optimization design of electromagnetic devices. The ESSA has the same structure as of the SSA with some modifications in order to enhance its performance for the optimization design of EMDs. In the ESSA, the leader salp does not move around the best position with a fraction of the distance between the lower and upper bounds as in the SAA; rather, a modified mechanism is used. The performance of the proposed algorithm is tested on the widely used Loney’s solenoid and TEAM Workshop Problem 22 design problems. The obtained results show that the proposed algorithm is much better than the initial one. Furthermore, a comparison with other well-known algorithms revealed that the proposed algorithm is very competitive for the optimization design of electromagnetic devices. |
| Author(s): | H. R.E.H. Bouchekara, M. K. Smail, M. S. Javaid, S. I. Shamsah |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1488 KB |
| Title: | Approach for CM/DM Current Extraction and Crosstalk Analysis of Twisted-Wire Pairs with Random Non-uniform Twisting |
| Abstract: | In this paper, a twisted-wire pairs (TWP) with random non-uniform twisting is established. It is divided into a complete pitch segment and a noncomplete pitch segment by the ratio between the pitch and the length. The randomness of the actual TWP cable is accurately simulated by the following methods: 1) random combination of complete pitch segments; 2) random combination of non-complete pitch segments; 3) random combination between 1) and 2). Based on the TWP model, an equivalent multi-conductor transmission lines (MTLs) model can be obtained. The neural network algorithm is introduced to describe the complex relationship between the arbitrary position of the TWP and the per-unit-length (p.u.l) parameter matrix. In addition, the crosstalk and the common-mode (CM) and differential-mode (DM) noise under field-to-wire coupling are predicted. The numerical results show that crosstalk and CM/DM noise in TWP cable are susceptible to the twisted pitch at high frequencies. Compared with full-wave simulation, the accuracy of the proposed method is proved. |
| Author(s): | C. Huang, Y. Zhao, W. Yan, Y. Ji, Q. Liu, S. Li, Y. Cao |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 7943 KB |
| Title: | Antenna Resonant Frequency Modeling based on AdaBoost Gaussian Process Ensemble |
| Abstract: | The design of electromagnetic components generally relies on simulation of full-wave electromagnetic field software exploiting global optimization methods. The main problem of the method is time consuming. Aiming at solving the problem, this study proposes a regression surrogate model based on AdaBoost Gaussian process (GP) ensemble (AGPE). In this method, the GP is used as the weak model, and the AdaBoost algorithm is introduced as the ensemble framework to integrate the weak models, and the strong learner will eventually be used as a surrogate model. Numerical simulation experiment is used to verify the effectiveness of the model, the mean relative error (MRE) of the three classical benchmark functions decreases, respectively, from 0.0585, 0.0528, 0.0241 to 0.0143, 0.0265, 0.0116, and then the method is used to model the resonance frequency of rectangular microstrip antenna (MSA) and coplanar waveguide butterfly MSA. The MRE of test samples based on the APGE are 0.0069, 0.0008 respectively, and the MRE of a single GP are 0.0191, 0.0023 respectively. The results show that, compared with a single GP regression model, the proposed AGPE method works better. In addition, in the modeling experiment of resonant frequency of rectangular MSA, the results obtained by AGPE are compared with those obtained by using neural network (NN). The results show that the proposed method is more effective. |
| Author(s): | T. Zhang, Y. Tian, X. Chen, J. Gao |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1630 KB |
| Title: | Circularly Polarized Jute Textile Antenna for Wi-MAX, WLAN and ISM Band Sensing Applications |
| Abstract: | This study exhibits a circularly polarized (CP) conformal antenna actualized by using a jute textile as a substrate. Its sensing 3.5, 4.9, and 5.8 GHz in the Wi-MAX, WLAN, and ISM radio bands. The topology of the proposed antenna has relied on a curvature structure as the prime radiating element, and ground structure whirled in contradictive arrangement to the patch. Conductivity was materialized by applying copper paint through the traditional painting approach, i.e., brush painting. This fabrication method allows attaining the conformability with minimized size, lightweight, and low sensitivity to the environment without weakening the radiating performance. These attributes allowed the jute textile antenna appropriately for the incorporation in wearable devices for body-driven applications. The electromagnetic properties of the projected jute textile antenna accomplished in simulations were confirmed through the measurement of the antenna in an anechoic chamber. The CP jute textile antenna shows a peak gain of 4.93, 8.86, and 10.07dBi at 3.5, 4.9, and 5.8 GHz (WiMAX, WLAN, and ISM). |
| Author(s): | R. S. Duvvada, P. Narayanaswamy, M. B. T. Phani, N. K. Lakshmi |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1489 KB |
| Title: | Wideband Octagonal Dual Circularly Polarized Sub-array Antenna for Ku-Satellite Systems |
| Abstract: | In this paper the analysis and design of a dual circularly polarized 4×4 antenna array operating in Ku-band are discussed with emphasis on its sequential feeding network. The dual circular polarization is achieved by feeding a stacked octagonal patches with a wideband branch line coupler. The proposed 4×4 antenna array is based on two separate sequential feeding networks for LH and RH circular polarizations. The advantage of the proposed feeding network is that it is implemented on a single layer. Simulation results by using both HFSS and CST are presented for comparison. In addition, experimental verifications are presented. |
| Author(s): | K. M. Ibrahim, W. M. Hassan, E. A. Abdallah, A. M. Attiya |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1254 KB |
| Title: | A Broadband Dual-polarized Antenna with CRR-EBG Structure for 5G Applications |
| Abstract: | In this paper, a broadband dual-polarized antenna with concentric rectangular ring electromagnetic bandgap (CRR-EBG) structure is proposed for 5G applications. The antenna consists of a pair of ±45° cross dipoles, an EBG array, and two inverted L-shaped improved feeding structures. In particular the ring part of the feeding structures can reduce the coupling between two ports. The leaky wave area of the EBG structure can be used to increase bandwidths. According to the measured results, the bandwidths of port1 and port2 are 32% (3.04-4.21GHz) and 28.3% (3.13- 4.16GHz), respectively. The port-to-port isolation can reach up to 23 dB, and the average gain is approximately 5 dBi. The antenna has the advantages of a wide band, good isolation and a stable radiation pattern, which can be better used in 5G communications. |
| Author(s): | P. Chen, L. Wang, T. Ding |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1427 KB |
| Title: | Design and Analysis of Reflectarray Compound Unit Cell for 5G Communication |
| Abstract: | In this paper, a single-layer compound unit element is proposed for reflectarray antenna design operating in Ka-band (26.5-29.5GHz) at the center frequency of 28GHz. A systematic study on the performance of a compound unit element is examined first. The structure of the proposed unit element is a unique combination of two different shape simple patches i.e. cross dipole and square patches. The desired phase range is achieved due to the multi-resonance of both patch elements with a single layer without any air-gap. The compound unit element is simulated by computer models of CST Microwave studio based on the Floquet approach (infinite periodic approach) and it has achieved 348.589° reflection phase range. Furthermore, the analysis of the reflection phase range, S-curve gradient, reflection magnitude, fabrication tolerance, and surface current density is also simulated and demonstrated. Based on the remarkable performance, the proposed element can be considered as the best element of single-beam or multi-beam reflectarray antenna design for 5G applications. |
| Author(s): | T. Bashir, H. Xiong, A. Aziz, M. A. Qureshi, A. Wahab, M. Umaid |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1392 KB |
| Title: | Electromagnetic Response Prediction of Reflectarray Antenna Elements Based on Support Vector Regression |
| Abstract: | In this letter, support vector regression (SVR) is used to predict the electromagnetic (EM) response of a complex shaped reflectarray (RA) unit cell. The calculation of the scattering coefficients of passive RA elements with periodic intervals is firstly transformed into a regression estimation problem, and then an analysis model is established by SVR to quickly predict the EM response of the unit cells. To this end, the full-wave (FW) simulation software is used to obtain a set of random samples of the scattering coefficient matrix of the RA antenna unit cell, which is used for SVR training. Under the same conditions, the radial basis function network (RBFN) is also used to predict the EM response of the elements, and the comparison results show the effectiveness and accuracy of the proposed method. |
| Author(s): | L. Shi, Q. Zhang, S. Zhang, C. Yi, G. Liu |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 2277 KB |
| Title: | Performance and Analysis of UWB Aesthetic Pattern Textile Antenna for WBAN Applications |
| Abstract: | This article proposes a new aesthetic patternthree petal flower patch antenna that operates at Ultra Wide Band (UWB) for Wireless Body Area Network (WBAN) applications. The flower structure consists of three petals and a center circle patch with the partial ground plane at the bottom. A double-sided coppercoated conductive fabric, which is 0.08 mm thick, having a surface resistivity of 0.05 Ω/square, serves as the antenna patch and ground material. This conductive patch is placed in a denim jeans material with 1mm thick that forms the substrate. The utilization of a two-layer substrate and partial ground method enhances the impedance bandwidth of the antenna. The size of the antenna is 60 mm × 60 mm × 2.16 mm. The reflection coefficient, gain, efficiency, radiation pattern, and effects of bending were the various parameters analyzed for the flower antenna. The antenna radiates from 3 to 12 GHz, which covers the entire UWB frequency range from 3.1 to 10.6 GHz assigned by Federal Communications Commission (FCC). The measurement results validate the performance of a flower patch antenna. |
| Author(s): | T. Annalakshmi, S. Ramesh |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1629 KB |
| Title: | Design of Frequency Reconfigurable Patch Antenna for Sensing and Tracking Communications |
| Abstract: | This paper presents a front-end structure of a reconfigurable patch antenna for cognitive radio systems. The antenna structure consists of an Ultrawideband (UWB) sensing antenna and an array of frequency reconfigurable antennas incorporated on the same substrate. The UWB and reconfigurable antennas are fed by co-planar waveguides (CPW). The reconfigurability is achieved by rotating the series of patch antennas through a certain angle and the rotation is controlled by mechanical means using an Arduino microcontroller. The rotational reconfigurability has been preferred over MEMS switches, PIN diodes, and other lumped elements because the latter requires the need for bias lines. The entire structure is designed using High Frequency Structure Simulator (HFSS) software and the prototype is fabricated over FR-4 substrate having a thickness of 1.6mm and measurements are carried out. This antenna achieves a wideband frequency from 2 GHz to 12 GHz and distinct narrow band of frequencies by reconfigurability using single antenna consisting of different shapes spaced accurately to ensure isolation between adjacent frequency bands and each antenna element working for a bandwidth of 2 GHz for frequency from 2 GHz to 12 GHz upon a single substrate and the reconfigurable elements are controlled using a low cost Arduino microcontroller connected directly to the antenna which ensures accurate controlling of the rotation and fast switching between the antenna elements. The measured results agree with the simulated results and have less than 10 dB impedance bandwidth. |
| Author(s): | P. Anumuthu, K. M. Sultan, M. Saravanan, M. T. Ali, M. K. Venkatesh, M. G. K. Saleem, I. V. Nizamuddeen |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1383 KB |
| Title: | A Metamaterial Inspired Compact Miniaturized Triple-band Near Field Resonant Parasitic Antenna for WLAN/WiMAX Applications |
| Abstract: | This paper presents a metamaterial-inspired triple-band antenna specified for WLAN and WiMAX applications with a compact size of 24mm × 18mm × 1mm (at 2.4 GHz). It consists of a dual-band left-handed metamaterial (LHM) unit surrounded by a G-style monopole antenna. The LHM is first designed and analyzed with equivalent circuits and simulations. A loop antenna based on the LHM unit is designed and simulated to investigate the radiating performance of the LHM unit structure. We also ran simulations for the G-style monopole. Later, the LHM unit is employed as a near-field resonant parasitic (NFRP) element that surrounded by the G-style monopole. A prototype of this antenna is fabricated. Simulations and measurements were carried out and the results match well, identifying good omni-directional radiating performance. Radiation comparisons with the loop antenna and the G-style monopole indicate that due to NFRP, the G-style monopole’s pass bands are shifted to lower frequencies to satisfy 2.45 GHz and 5.5 GHz bands requirements, meanwhile the LHM unit structure operates a third pass band of 3.5 GHz. The compact size and good radiation properties of the antenna render it suitable for WLAN/ WiMAX applications. |
| Author(s): | S. Li, A. Z. Elsherbeni, Z. Ding, Y. Mao |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 2193 KB |
| Title: | A Third-Order Bandpass Three-Dimensional Frequency Selective Surface with Multiple Transmission Zeros |
| Abstract: | We present a third-order bandpass threedimensional frequency selective surface (3D FSS) with multiple transmission zeros in this paper. The unit cell of the proposed 3D FSS consists of an air-filled square waveguide and a cuboid dielectric block with three concentric metallic square loops. Due to its inner electromagnetic coupling in the unit cell, this FSS provides a flat passband with three transmission poles, a wide out-of-band rejection with three transmission zeros, and high frequency selectivity. In order to explain the working principle, an equivalent circuit model is established and investigated. Finally, an FSS prototype is fabricated and measured, and the results exhibit good stability for both TE and TM polarizations under incident angles from 0° to 50°. Besides, this FSS has a relatively compact unit cell. |
| Author(s): | Z. Yu, W. Tang |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 1702 KB |
| Title: | Radiated Susceptibility Analysis of Multiconductor Transmission Lines Based on Polynomial Chaos |
| Abstract: | To address the uncertainties of the radiated susceptibility of multiconductor transmission lines (MTLs), a surrogate model of the MTLs radiated susceptibility is established based on generalized polynomial chaos (gPC), and the gPC is made sparser by combining the adaptive hyperbolic truncation (AHT) scheme and the least angle regression (LAR) method. The uncertainties of the radiated susceptibility of transmission lines are calculated using the adaptive-sparse polynomial chaos (AS-PC) scheme. The parameters related to the incident field, such as elevation angle θ, azimuth angle ψ, polarization angle η, and field amplitude E, are inevitably random. Therefore, these four variables are taken as random input variables, and each of them is subject to different variable distributions. The MTLs model with infinite ground as the reference conductor is adopted, different impedances are used and the AS-PC scheme is combined with transmission line theory to calculate the average, standard deviation and probability distribution of the radiated susceptibility of MTLs. Sobol global sensitivity analysis based on variance decomposition is adopted to calculate the influence of random input variables on the MTLs radiated susceptibility model. The calculation results are compared with the results of the Monte Carlo (MC) method, proving that the proposed method is correct and feasible. |
| Author(s): | T. Wang, Q. Yu, X. Yu, L. Gao, H. Zhao |
| File Type: | Journal Paper |
| Issue: | Volume: 35 Number: 12 Year: 2020 |
| Download Link: | Click here to download PDF File Size: 2088 KB |