ACES Publication Search
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| Title: | ACES Journal July 2024 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 1967 KB |
| Title: | ACES Journal July 2024 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 352 KB |
| Title: | ACES Journal June 2024 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 352 KB |
| Title: | Parameter Optimization of Electromagnetic Sensing and Driving Scheme of a Compact Falling-body Viscometer |
| Abstract: | In order to achieve automatic fast reset of the falling-body (FB) viscometer, and reduce the volume of the device and the amount of sample used, this paper proposes to use a single coil to reset the FB and use another single coil to measure the FB position. In this paper, the characterization ability of the sensing coil impedance to the FB position and its influencing factors, and the reset ability of the driving coil to the FB and its enhancement factors, are studied via electromagnetic finite element simulations and experiments. There is a linear zone between the FB position and the sensing coil impedance, with the slope being largest. The lower limit of the FB motion should be designed in this linear zone to accurately determine the moment when the FB reaches the lower limit point. Increase in the FB height, and in the number of turns of the sensing coil, and decrease in the wire diameter are beneficial to the FB positioning. There is a maximum force point when the FB approaches the driving coil, and the FB’s motion range needs to cover this point for reliable reset. Using iron plugs allows the FB to obtain greater electromagnetic attraction and ensure its successful reset. Experimental results show that the device requires only 1 mL of sample to measure liquid viscosity. For 9.5-1265 mPa-s dimethyl silicone oil, the average absolute value of the relative measurement error is 0.22% and the maximum value is 4.3%. |
| Author(s): | K. Zhang, H. Zhang, Y. Xue, J. Ma, J. Han, X. Huang |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 4338 KB |
| Title: | Equivalent Circuit Model for Convoluted Meander Line Frequency Selective Surface for Multi-frequency Applications |
| Abstract: | This research investigates a multi-resonant frequency selective surface (FSS) structure with convoluted meander line. An equivalent circuit analysis was conducted in three different 10×10 array structures having 200 mm × 200 mm size with 10 mm × 10 mm unit cell. The simple plus structure achieved a single resonant frequency of 10 GHz at −27 dB, dual frequencies of 4.6 GHz at −22 dB and 11.6 GHz at −28 dB while increasing the length of meander lines to three turns. By adding an extra six turns for a total of nine turns, the structure achieved three resonant frequencies of 3.4G Hz at −28 dB, 10.6 GHz at −22 dB and 16 GHz at −20 dB. The polarization insensitivity and transmission coefficient in transverse electric (TE) and transverse magnetic (TM) modes has been validated with the equivalent circuit model (ECM) and tested with measurement also. The result demonstrates that the proposed FSS can be applied for WiMax, X and Ka-band wireless communication and radar systems applications. |
| Author(s): | D. Jeyaraman, S. Santhanam |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 5352 KB |
| Title: | Contribution of Mobile Communication Technologies to EMF Exposure in the University of Novi Sad Campus Area |
| Abstract: | Densely populated areas are usually extensively exposed to the emission of electromagnetic fields (EMFs) that is primarily caused due to extensive use of wireless telecommunication technologies, particularly those providing mobile phone communication services. Consequently, observation and control of EMF levels in human surroundings have great importance in terms of human health and environmental protection. Particular efforts have to be devoted to EMF investigation in highly sensitive areas, where people can stay for quite long periods, such as university campuses. This paper brings the results of 2023 EMF monitoring campaign, performed over the University of Novi Sad campus for the third time, comparing them with EMF results obtained in previous 2012 and 2018 campaigns. Having in mind the emergence of new 4G Long Term Evolution (LTE) base stations in the campus, during 2022, a special focus of the 2023 campaign was on the inevitable increase of field levels, because of the contribution of 2G/3G/4G mobile communication technologies to human EMF exposure. Despite the expected increase of the field levels, obtained values were still significantly lower than the minimal reference levels, prescribed by the Serbian legislation. |
| Author(s): | D. R. Kljajic, N. M. Djuric, K. K. Kasas-Lazetic, M. M. Milutinov, S. M. Djuric |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 3104 KB |
| Title: | Analysis and Simulations of Electrothermal Characteristics of Water-based Ultrawideband Absorber Using HIE-FVM Hybrid Method |
| Abstract: | In this study, the dispersion characteristics, impedance features, and absorption conditions of water-based electromagnetic (EM) absorbers are investigated. A methodology for the rapid construction of a three-layer water-based absorber structure is proposed. Concurrently, a weakly conditionally stable Hybrid Implicit-Explicit Finite Difference Time Domain (HIEFDTD) method is introduced to enhance the computational efficiency of thin layer structures. Furthermore, the EM computation integrates thermal effect calculations. A hybrid approach, combining the HIE-FDTD and Finite Volume Method (FVM), is employed to analyze temperature variations induced by EM wave incidence on the absorber. |
| Author(s): | W.-B. Yan, Y. Wang, Q.-S. Cao |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 9578 KB |
| Title: | Improving Kriging Surrogate Model for EMC Uncertainty Analysis Using LSSVR |
| Abstract: | As the in-depth study of uncertainty analysis in electromagnetic compatibility (EMC) progresses, the surrogate model-based uncertainty analysis method has increasingly become a popular research topic. The Kriging model is one of the classical surrogate models and plays an important role in EMC uncertainty analysis. However, an in-depth study of the Kriging sampling strategy is missing in the existing research on uncertainty analysis. The traditional sampling strategy employs Latin hypercube sampling (LHS) to select all sampling points at once, which makes the computational efficiency and accuracy of the surrogate model uncontrollable. This paper proposes a strategy that applies least squares support vector machine regression (LSSVR) to assist Kriging in sampling, significantly improving the efficiency and accuracy of the Kriging surrogate model. |
| Author(s): | S. Huo, Y. Song, Q. Liu, J. Bai |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 649 KB |
| Title: | Correlations of Salivary and Blood Glucose Level Detection using Flexible Sensor Technique |
| Abstract: | Indonesia had a total of 19.47 million individuals diagnosed with diabetes in 2021, the fifth position globally, as reported by the International Diabetes Federation (IDF). Diabetes requires periodic medical examinations, yet many individuals are hesitant to utilize invasive medical devices. The ring slot circular resonator (RSCR) inspired this sensor’s design. Non-invasive glucose measurement was done with flexible 2.45 GHz sensors. The reflection coefficient (S11) simulation result is -20.76 dB at 2.458 GHz and 894.8 MHz bandwidth. Saliva samples obtained from 20 individuals were subjected to 20 separate tests. Before collecting saliva samples, the volunteers’ blood sugar levels were assessed. Research indicates that the appropriate frequency range for average blood sugar levels (less than 125 mg/dl) is 1.55 GHz to 2.16 GHz, while diabetes patients with blood glucose levels (BGL) above 125 mg/dl had frequencies above 2.3 GHz. Test results show a positive correlation between glucose level and testing frequency. In addition to blood samples, saliva samples can serve as alternate specimens for assessing an individual’s BGL. |
| Author(s): | Y. Rahayu, F. Arifa, M. Alaydrus, Anhar, T. Praludi, H. Masdar, S. Alam |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 1464 KB |
| Title: | Study on Esophageal Tumor Detection Based on the MTV Algorithm in Electrical Impedance Imaging |
| Abstract: | This paper presents a method for detecting and locating esophageal tumors using electrical impedance tomography (EIT) based on the modified total variation (MTV) regularization algorithm, utilizing a four-layer electrode array balloon detection structure. The optimal structure of the electrode array was obtained using the uniform design (UD) method. By integrating esophageal tissue structure information, physical models containing tumors at different locations were constructed. Using the adjacent excitation mode, the study compared average voltage, voltage dynamic range, and boundary voltage changes of electrode pairs within onequarter of a cycle to analyze esophageal tumor characteristics. By comparing the correlation coefficients, relative errors, and imaging times of three reconstruction algorithms, the MTV algorithm, which best matches the morphological characteristics of the esophagus, was selected for image reconstruction. The calculated tumor height showed an error (ΔH) within 1 mm, indicating that EIT can provide vital information on the position, size, and electrical properties of esophageal tumors, demonstrating significant potential for clinical application in esophageal examinations. |
| Author(s): | P. Ran, W. Liu, M. Li, Y. Lai, Z. Jiao, Y. Zhong |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 7649 KB |
| Title: | High Gain Circularly Polarized Patch Antenna for Communications Between Cutting Tools and the Control Unit of Mining Equipment |
| Abstract: | A 2.44 GHz high gain circular polarized (CP) patch antenna is designed, fabricated and tested for operation while mounted on a rotating cutting drum of a mining or excavation machine. This design incorporates a radiating element that is elevated above the ground plane to increase the antenna gain. The design utilizes a single feed source and a square truncated corner patch to produce CP radiation. The gain of the final design reached 9 dBi with a sufficiently CP axial ratio and more than −25 dB cross-polarization isolation. This system enables the data communication between the rock cutting tools installed on the machine and the unit to enable the remote monitoring of tool conditions as well as identification of the formations being mined. |
| Author(s): | C. T. Kringlen, A. Z. Elsherbeni, J. Rostami |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 10076 KB |
| Title: | A Tunable Broadband Absorber Based on Active Frequency Selective Surface |
| Abstract: | In this paper, a tunable metamaterial absorber (MMA) based on active frequency selective surface (FSS) is proposed, which can dynamically tune three absorption bands. The equivalent circuit model (ECM) was used to design the MMA and elucidate its mechanism of switchable absorption. By changing the state of the PIN diode in the lossy layer and FSS layer, the absorption frequency can be tuned continuously. The tuning of the three absorption bands from S- to C-band is achieved. The numerical simulation results show that the describedMMAcan achieve a bandwidth of 6.2 GHz and can dynamically tune between 1.86-2.70 GHz, 2.42-5.29 GHz, and 4.16-8.10 GHz. The reflectivity is lower than -10 dB, and the fractional bandwidth reaches 125.3%. In addition, the MMA’s prototype was produced and measured. The measurement results are generally consistent with the simulation results. |
| Author(s): | B. Zhang, X. Kong, R. Xu, L. Zhao, H. Song, S. Zhang, J. Liu |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 2459 KB |
| Title: | Design of DC to 40 GHz GaAs-based MMIC Attenuators by Utilizing Full-chip Numerical Analyses |
| Abstract: | In this study, a numerical analysis-based design methodology of monolithic microwave integrated circuit (MMIC) attenuators on a GaAs-based microwave integrated passive device (IPD) technology is presented. The designs have 0 dB, 3 dB, 4 dB, 6 dB, 10 dB, 12 dB, 20 dB, and 30 dB attenuation from DC to 40 GHz. The attenuators are designed for a maximum RF power of 26 dBm and a maximum die area of 0.25 mm2. The circuits are physically compact but electrically large. The finite element method and Method of Moments (MoM)- based analyses are used. The MoM-based solutions show close correlations with the measurements. The measured return losses are better than 20 dB, and insertion loss variation is less than 0.5 dB across the entire band. This paper explains the detailed design steps and numerical electromagnetic setup to achieve first-pass success. |
| Author(s): | M. E. Bayrak, H. Tekin, H. S. Savci |
| File Type: | Journal Paper |
| Issue: | Volume: 39 Number: 7 Year: 2024 |
| Download Link: | Click here to download PDF File Size: 15403 KB |