ACES Publication Search
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| Title: | ACES Journal March 2021 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 2226 KB |
| Title: | ACES Journal March 2021 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 12393 KB |
| Title: | ACES Journal March 2021 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 26632 KB |
| Title: | DNA Hybridization Detection based on Plasmonic Photonic Crystal Fiber |
| Abstract: | A novel design of surface plasmon (SP) photonic crystal fiber (PCF) for DNA hybridization detection is proposed and analyzed. The suggested biosensor relies on plasmonic D-shaped PCF configuration. Accordingly, the core guided mode in the silica core is coupled with the SP mode near the plasmonic layer. The resonance wavelength is sensitive to the DNA hybridization process. Therefore, the suggested bio-sensor is studied to maximize the DNA hybridization detection sensitivity by adjusting the structural geometrical parameters. The numerical results are obtained using full vectorial finite element method with perfectly matched layer boundary condition and non-uniform meshing capabilities. The reported Dshaped PCF offers high wavelength sensitivity of 405.4 nm/RIU with a corresponding amplitude sensitivity of 5.65 RIU−1. Consequently, the applications based on DNA classification can be potentially implemented by the reported biosensor. |
| Author(s): | M. Y. Azab, A. M. Nasr, S. S. A. Obayya, M. F. O. Hameed |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1526 KB |
| Title: | An Efficient Rotationally Symmetric Approach for the Design of Sparse Conformal Arrays in Wide Angle Scanning |
| Abstract: | This paper addresses a novel rotationally symmetric technique with multiple constraints for sparse conformal array synthesis. The purpose is to synthesis a sparse optimal common element positions on the conformal surface varying multiple patterns of wide angle scanning with the behavior of low sidelobe levels (SLL). The conformal surface aperture is partitioned into several rotationally symmetric sections. The element positions and element numbers of only one section need to be optimized, which contribute to the reduction of optimizing variables and computation resources. We formulate the synthesis problem as a constrained optimization problem, which takes the peak sidelobe level (PSLL) as the fitness function, and sets the total number of array elements, the minimum spacing between two adjacent elements to form multiple constraints. The Brain Storm Optimization (BSO) is further exploited into the synthesis problem with multiple constraints. A set of representative numerical examples are presented to assess the advantages and effectiveness of the proposed method. |
| Author(s): | P. Gu, Z. Fan, D. Ding, R. Chen |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 2514 KB |
| Title: | Analysis for Scattering of Non-homogeneous Medium by Time Domain Volume Shooting and Bouncing Rays |
| Abstract: | In order to evaluate scattering from hypersonic vehicles covered with the plasma efficiently, time domain volume shooting and bouncing rays (TDVSBR) is first introduced in this paper. The new method is applied to solve the transient electromagnetic scattering from complex targets, which combines with non-homogeneous dielectric and perfect electric conducting (PEC) bodies. To simplify the problem, objects are discretized into tetrahedrons with different electromagnetic parameters. Then the reflection and transmission coefficients can be obtained by using theory of electromagnetic waves propagation in lossy medium. After that, we simulate the reflection and transmission of rays in different media. At last, the scattered fields or radiation are solved by the last exiting ray from the target. Compared with frequencydomain methods, time-domain methods can obtain the wideband RCS efficiently. Several numerical results are given to demonstrate the high efficiency and accuracy of this proposed scheme. |
| Author(s): | J. Li, H. Bao, D. Ding |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1364 KB |
| Title: | Neural-Network-Based Multiobjective Optimizer for Dual-Band Circularly Polarized Antenna |
| Abstract: | A multiobjective optimization (MOO) technique for a dual-band circularly polarized antenna by using neural networks (NNs) is introduced in this paper. In particular, the optimum antenna dimensions are computed by modeling the problem as a multilayer feedforward neural network (FFNN), which is two-stage trained with I/O pairs. The FFNN is chosen because of its characteristic of accurate approximation and good generalization. The data for FFNN training is obtained by using HFSS EM simulator by varying different geometrical parameters of the antenna. A two strip-loaded circular aperture antenna is utilized to demonstrate the optimization technique. The target dual bands are 835– 865 MHz and 2.3–2.35 GHz. |
| Author(s): | T. Sallam, A. M. Attiya, N. A. El-Latif |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1386 KB |
| Title: | A Low Complex Modified Grey Wolf Optimization Model for OFDM Peak Power Reduction |
| Abstract: | Orthogonal frequency division multiplexing (OFDM) or multicarrier modulation is an essential signal processing technique in new generation wireless gadgets owing to its potential to support fast and spectrally efficient transmission. One of the major limitations of OFDM systems is the peak-to-average power ratio (PAPR) of transmit data. In this article, a novel meta heuristic algorithm called modified grey wolf optimizer is used to boost the computing performance of subcarrier phase factor search in the undisputed partial transmit sequence method. The proposed modified grey wolf optimizer (mGWO) has a balancing between exploration and exploitation phases while searching for peak power carriers and brings out a nearly optimal performance but with less number of iterations. The objective is to propose low complex computing algorithm without compromising the output quality. The simulation results of proposed mGWO-PTS model assure improvements around 20 to 25 percent from that of the comparative counterparts such as GWO-PTS, PSO-PTS, and etc. |
| Author(s): | R. S. Suriavel Rao, R. Menaka, R. Alexciyaa Winslet |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1399 KB |
| Title: | Analysis and Design of an Efficient and Novel MIMO Antenna for 5G Smart Phones Using FDTD and FEM |
| Abstract: | A novel and compact antenna element is analyzed and designed to achieve an efficient 4x4 MIMO antenna for a mobile phone at 3.5 GHz band for 5G communication. FTDT and FEM techniques are used to analyze and compare modeling accuracy of the proposed MIMO antenna. It has achieved a minimum isolation of 19.7dB between two antennas with radiation efficiency of 86%. The improved isolation and efficiency for the proposed MIMO antenna has been achieved without any decoupling structure between antennas, instead larger separation between elements due to compact size of the proposed element facilitated to achieve good performance. Pattern diversity is also achieved by arranging adjacent asymmetric antennas in reverse direction with each other. The envelope correlation coefficient (ECC) is less than 0.002 and Channel Capacity loss (CCL) is also less than 0.4 bps/Hz in the whole frequency band (3.36-3.66 GHz), which is suitable for 5G MIMO systems. |
| Author(s): | R. M. Asif, A. Aziz, M. Amjad, M. N. Akhtar, A. Baqir, M. N. Abbasi |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1660 KB |
| Title: | Broadband, Beam-Steering Asymmetric Stacked Microstrip Phased Array with Enhanced Front-to-Back Ratio |
| Abstract: | The backward radiation is a critical problem that may cause breakdown of the front-end circuits that are integrated behind the antenna. Thus, antennas having high Front to Back Ratio (FBR) are required. For phased arrays, the back lobe suppression is required for all scanning angles at all frequencies of the band. In this work, a stacked patch linear array with asymmetric configuration is proposed. It is capable of scanning the beam in ±40º with less than 1.34 dB scanning loss. Due to the usage of probe-fed stacked patches as the antenna elements, impedance matching in 8-10 GHz is achieved. More than 30 dB FBR is obtained for broadside radiation. It is above 20 dB when the beam is steered to θ = 40º. This is valid for all frequencies of the band. A prototype is fabricated and measured. Higher than 38 dB FBR is observed. With its broadband, high FBR and low scanning loss, the proposed asymmetrical stacked patch phased array is suitable as radar and base station antenna. |
| Author(s): | M. Turk, F. Tokan |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 2066 KB |
| Title: | Dual-band (28/38 GHz) MIMO Antenna System for 5G Mobile Communications with Efficient DoA Estimation Algorithm in Noisy Channels |
| Abstract: | In this paper, a dual-band (28/38 GHz) linear antenna arrays of four and eight elements are proposed to work as a MIMO arrays for the 5G communication systems. Each element in the array is a dual-band Yagi- Uda antenna designed to operate at 28 and 38 GHz. The eight-elements array size has a total dimension of 79.4 mm × 9.65 mm excluding the feeding microstrip line. The maximum gain of the array is about 18 dB. The peaks of correlation at matched angles (PCMA) technique is applied to determine the direction of arrival for multiple incoming signals. The effects of phase noise and additive Gaussian noise on the error in the DoA estimation are studied showing good accuracy of the PCMA algorithm. Numerical and experimental investigations are achieved to assess the performance of both the single-element antenna and the eight-element MIMO linear antenna array. It is shown that the simulation results agree with the experimental measurements and both show good performance of the single antenna as well as the MIMO linear array system. The envelope correlation coefficient (ECC) and the diversity gain (DG) are calculated and the results show that the proposed MIMO antenna system is suitable for the forthcoming 5G mobile communications. The radiation patterns for single antenna and four-element array are measured and compared to the electromagnetic simulation results showing good agreement. |
| Author(s): | A. E. Farahat, K. F. A. Hussein |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 2679 KB |
| Title: | A Broadband H-plane Printed Horn Antenna with Sandwich Substrate Structure for Millimeter-wave Applications |
| Abstract: | Antenna is a very important element and plays a key role in communication systems for radiating energy. Based on high data rate speed requirements and large volume multimedia applications, 3G, 4G and now 5G technologies have been introduced and implemented. This paper presents a low profile antenna with novel structure and large continuous bandwidth for 5G broadband and millimeter-wave wireless applications. It is an H-plane printed horn antenna with multi-layered sandwich substrate. There are two Rogers (RO3003(tm)) substrates that make a sandwich structure with eight stainless steel columns. The proposed antenna is expected to give an impedance bandwidth 20-45 GHz with S11 < -10dB and 8.64dBi gain at 28 GHz design frequency. ANSYS 18.2 HFSS simulator is used for designing and optimization of the profile antenna. A comparison between simulated and measured results confirms the validity of the proposed design. |
| Author(s): | H. U. Tahseen, L. Yang, W. Hongjin |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1653 KB |
| Title: | Multiband Triple L-Arms Patch Antenna with Diamond Slot Ground for 5G Applications |
| Abstract: | This paper reported a pioneering 5G multiband microstrip line fed patch antenna for IoT, wireless power transfer (WPT) and data transmission. The proposed antenna is accomplished using a triple L-arms patch antenna responsible for the multiband response. A diamond-shaped ground slot is added to control and increase the bandwidth of the resonant frequency. The antenna is designed to resonate at 10, 13, 17 and 26 GHz with 10 dB impedance bandwidths of 0.67, 0.8, 2.45 and 4.3 GHz respectively. The proposed antenna is fabricated using microstrip technology with total area of 16.5x16.5 mm2. The 5G multiband antenna has sufficient realized gain of 4.95, 5.72, 4.94 and 7.077 dB respectively. The antenna is designed and simulated using the CST Microwave Studio Suite (Computer Simulation Technology). Measurements show good agreement with simulations in all frequencies of operation. |
| Author(s): | D. H. Sadek, H. A. Shawkey, A. A. Zekry |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1499 KB |
| Title: | Design and Comparative Analysis of Ultra-wideband and High Directive Antennas for THz Applications |
| Abstract: | This work presents a comprehensive detailed comparative study of the three ultra-wideband and high directive antennas for the THz imaging, spectroscopy, and communication applications. Three different types of photoconductive antennas (log-spiral, Vivaldi, and bowtie antennas) are designed and simulated in the frequency range of 1 to 6 THz in the CST microwave studio (MWS). The enhanced directivity of the designed PCAs is achieved with the integration of the hemispherical silicon-based lens with the PCA gold electrode and quartz substrate of the proposed antennas. The performance of the designed PCAs is compared in terms of impedance and axial ratio bandwidths, directivity, and radiation efficiency of the proposed antennas. The reported log spiral, Vivaldi PCAs with added silicon lens exhibit the -10 dB impedance bandwidth of 6 THz, 3dB AR bandwidth of 5 THz, 6 THz, and 6 THz and peak total radiation efficiencies of 45%, 65%, and 95% respectively. |
| Author(s): | A. Yahyaoui, J. Yousaf, A. Dhiflaoui, M. Nour, M. Zarouan, M. Aseeri, H. Rmili |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 2139 KB |
| Title: | Radar Cross Section Reduction and Shape Optimization using Adjoint Method and Automatic Differentiation |
| Abstract: | An efficient Radar Cross Section (RCS) gradient evaluation method based on the adjoint method is presented. The Method of Moments is employed to solve the Combined Field Integral Equation (CFIE) and the corresponding derivatives computing routines are generated by the program transformation Automatic Differentiation (AD) technique. The differential code is developed using three kinds of AD mode: tangent mode, multidirectional tangent mode, and adjoint mode. The differential code in adjoint mode is modified and optimized by changing the “two-sweeps” architecture into the “inner-loop two-sweeps” architecture. Their efficiency and memory consumption are tested and the differential code using modified adjoint mode demonstrates the great advantages in both efficiency and memory consumption. A gradient-based shape optimization design method is established using the adjoint method and the mechanism of RCS reduction is studied. The results show that the sharp leading can avoid the specular back-scattering and the undulations of the surface could change the phases which result in a further RCS reduction. |
| Author(s): | M. Li, J. Bai, F. Qu |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 2399 KB |
| Title: | A Fully Connected Cluster with Minimal Transmission Power for IoT Using Electrostatic Discharge Algorithm |
| Abstract: | In the emerging age of the Internet of Things (IoT), energy-efficient and reliable connection among sensor nodes gain prime importance. Wireless engineers encounter a trade-off between sensors energy requirement and their reliable full connectivity. Consequently, the need to find the optimal solution draws the attention of many researchers. In this paper, the Electrostatic Discharge Algorithm (ESDA) is proposed, implemented, and applied to minimize energy needs of a sensor node while ensuring the fully-connectedness of each node. The obtained results show that the proposed method achieves better results than those found in the literature using the particle swarm optimization method in terms of energy savings and reliable connectivity. |
| Author(s): | M. A. Alanezi, H. R. E. H. Bouchekara, M. S. Javaid, M. S. Shahriar |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1482 KB |
| Title: | Compact Tri-Band Microstrip Patch Antenna Using Complementary Split Ring Resonator Structure |
| Abstract: | In this letter, a compact complementary split ring based tri-band antenna is proposed. The proposed antenna resonates at 1.9 GHz (1.70-1.91 GHz), 2.45 GHz (2.23-2.52 GHz) and 3.2 GHz (2.9-3.25 GHz); the input match values are 24.56 dB, 27.21 dB and 22.46 dB, respectively. The antenna’s realised peak gain is 4.15 dBm at 1.9 GHz, 4.25 dBm at 2.4 GHz and 4.74 dBm at 3.2 GHz, with approximately 42% of reduction in antenna size. The results demonstrate that the proposed metamaterial antenna is tunable, electrically small and highly efficient, which makes it a suitable candidate for RF energy harvesting. The antenna is numerically and experimentally analysed and validated with very good comparison between the simulated and measured results. |
| Author(s): | N. Rajesh Kumar, P. D. Sathya, S. K. A. Rahim, M. Z. M. Nor, A. Alomainy, A. A. Eteng |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1638 KB |
| Title: | 2.4 GHz and 5.2 GHz Frequency Bands Reconfigurable Fractal Antenna for Wearable Devices using ANN |
| Abstract: | Patch antenna is being used widely in wearable and implantable devices due to its lightweight characteristics. Multi-band patch antenna designs are possible by incorporating professional naturally inspired fractal pattern generating methodologies. Automated Frequency Characteristics Analyzer (AFCA), Artificial Neural Network based Fractal Pattern Generator (AFPG) and Nitinol based Pattern Selector (NPS) functional modules are proposed in this work to design a Dual band Reconfigurable Fractal Antenna for Wearable Devices (DRFA). Producing a miniature fractal patch antenna to support famed 2.4 GHz and 5.2 GHz frequency bands with lesser than 20db return loss is the objective of this work. Numerous fractal patterns are generated with the help of AFPG and their frequency responses are analyzed by Ansys HFSS (High Frequency Structure Simulator) through AFCA module. The results are provided to the AFPG part to train the neural network with proper biasing updates. The fitness function is set to the dimension restriction of 3000 square μm with less than 20 return loss at commonly used 2.4 GHz and 5.2 GHz. The feed type and length of the patches are also fine-tuned by the proposed AFPG module. |
| Author(s): | S. Ambigapathy, J. Paramasivam |
| File Type: | Journal Paper |
| Issue: | Volume: 36 Number: 3 Year: 2021 |
| Download Link: | Click here to download PDF File Size: 1542 KB |