ACES Publication Search
There are 13 search results for:
| Title: | ACES Journal October 2022 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1968 KB |
| Title: | ACES Journal October 2022 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 339 KB |
| Title: | ACES Journal October 2022 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 16195 KB |
| Title: | An Efficient Method for Predicting the Shielding Effectiveness of an Apertured Enclosure with an Interior Enclosure based on Electromagnetic Topology |
| Abstract: | A fast analytical method has been proposed for predicting the shielding effectiveness (SE) and resonances of an apertured enclosure with an interior enclosure. Under the concept of electromagnetic topology, the monitor point and the walls are treated as nodes, and the space between them is treated as tubes. The propagation relationships at tube level and reflection relationships at node level are derived as the propagation matrix. After modeling the front wall of the interior enclosure as a junction between two waveguides, an equivalent circuital model of the enclosures is derived. The front wall and the window structure in front of the adjacent space of the interior enclosure are considered as a three-port scattering matrix. Then we can use the extended BLT equations to calculate the voltage response at each node. Results from the proposed method are compared with those from the numerical method, and the results have a good agreement while it can dramatically save calculation time. |
| Author(s): | J.-C. Zhou, X.-T. Wang |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1113 KB |
| Title: | Localization of Breast Tumor Using Four Elements UWB Wearable Antenna |
| Abstract: | In this paper, four wearable UWB antennas are designed to detect and locate tumor cells placed within a heterogeneous phantom at different positions. The proposed antenna is operated within the 4.90 GHz to 15.97 GHz bandwidth range. It is fabricated, measured, and nearly matched between measured and simulated results. A cavity is formulated to back each antenna within the proposed detection system for increasing penetration and gain of propagated electromagnetic waves of the antenna design. The S-parameter of the proposed system was used to detect and locate a small tumor. The SAR results show that the absorbed power by the breast phantom tissues satisfies the IEEE standards which confirms the appropriateness of the proposed antennas for breast cancer early detection and localization system. |
| Author(s): | M. B. Tayel, T. G. Abouelnaga, N. M. Badran |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 2757 KB |
| Title: | Dual-band Bandpass Plasmonic Filter Based on Effective Localized Surface Plasmon Resonators |
| Abstract: | A dual-band bandpass plasmonic filter based on quarter-wavelength effective localized surface plasmon resonators (ELSPRs) is proposed in this work. Compared with conventional microstrip resonators, ELSPRs have a larger unloaded quality factor and compact size, which can be flexibly designed. Since the harmonics of quarter-wavelength ELSPRs are located only at odd times of their dominant mode frequency, we can not only miniaturize the filter but achieve excellent out-ofband rejection performance. For demonstration, we design and fabricate a dual-band bandpass plasmonic filter, whose size is only 0.0396 λ02, the center frequency is 3.1 GHz and 3.6 GHz, and the relative bandwidth is 10.7% and 7.7% respectively. Measurement results show excellent agreement with the simulations. Our results provide a route for realizing ultra-compact and highperformance functional devices for the fifth generation (5G) applications. |
| Author(s): | Z. Zhou, L. Liu, X. Li, J. Shen, G. Han, Z. Li |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1829 KB |
| Title: | Analysis of Super-Solar Integrated Patch Antenna for Sub-6 GHz and Beyond 6 GHz Millimeter Wave 5G Applications |
| Abstract: | This article describes a new compact parasitic patch-loaded transparent patch antenna with a copper ground plane for wireless-fidelity (Wi-Fi) and 5th generation (5G) millimeter-wave (mm-wave) applications. The proposed antenna uses two rectangular parasitic patches with a rectangular main radiation patch. The L-shaped strips are also added to the main radiation patch and one of the rectangular parasitic patches to cover both the sub-6 GHz and beyond 6 GHz mm-wave 5G frequency spectrums. The same transparent patch antenna with a solar ground plane is built, and its effect is parametrically studied alongside the integration of a polycrystalline silicon solar cell. The proposed antennas with a dimension of 42×30×2 mm3 are fabricated and experimentally validated for impedance and radiation characteristics. In terms of impedance bandwidth, the proposed copper ground plane antenna offers 36.89% (5.04- 7.32 GHz), 5.15% (14.35-15.11 GHz), 6.23% (27.08- 28.79 GHz), and 21.34% (31.64-39.81 GHz). The solar cell serves as both a photovoltaic generator and the ground plane of the transparent antenna. The same radiating patch with a solar ground plane offers impedance bandwidth of 36.03% (4.47-6.56 GHz), 14.4% (9.6- 11.12 GHz), 2.55% (22.14-22.71 GHz), and 27.9% (28.79-39.05 GHz) for 5G applications. |
| Author(s): | S. B. T. Naganathan, S. Dhandapani, T. Packirisamy |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 3193 KB |
| Title: | Determination of the Physical Integrity of Ethernet Cables by Obtaining their Transmission Line Parameters from Measured Impedance Profiles |
| Abstract: | A method of determining the physical integrity of Ethernet cables by obtaining their transmission line parameters (resistance, inductance, capacitance, and conductance) from their measured impedance profiles are presented. The transmission line parameters were extracted across the cable lengths rather than frequencies used in most research. The method can be used to examine the physical integrity of Ethernet cables before their deployment. The study of the physical integrity of Ethernet cables is very important because, in typical installations, cables can be manipulated in the form of repeated coiling and uncoiling. The installation handling stress can adversely affect the signal integrity especially if they are substandard Ethernet cables. In this paper, four Ethernet cables were subjected to three coiling and uncoiling tests to represent installation handling stress. The impedance profiles of the four cables across their lengths were measured for the three handling stress test conducted. The computation of the transmission line parameters of the Ethernet cables using measured impedance profiles was implemented with the aid of Matrix Laboratory (MATLAB). The outcome of the research showed that the method presented will be very useful to cable installers and contractors in making objective decisions in the choice of cables for deployment. |
| Author(s): | O. Ogundapo, A. P. Duffy |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1064 KB |
| Title: | Estimation of Soil Electric Properties and Water Content Through PolSAR Target Decomposition |
| Abstract: | A new method is proposed to recover the electric properties and water content of ground soil by applying the Target Decomposition (TD) theory for Polarimetric Synthetic Aperture Radar (PolSAR) images. The proposed method depends on the ε-σ characteristic curves of the soil which are unique for each soil type at a specific frequency. This method is examined for the clayey type soil which is found in most naturally vegetated land areas. Also, a novel method is developed for the realistic simulation of PolSAR images of natural lands, including forest regions, grasslands, and bare lands being prepared for gardens or crop cultivation. This method is based on the reverse of the PolSAR TD theory. The numerical results presented in this paper are concerned with the characterization of the most common type of clayey soil. Also, some of the numerical results presented in the present paper aim to achieve realistic PolSAR datasets using the inverse TD theory. Finally, some numerical results are presented for quantitative assessment of the method proposed to recover the properties and water content of the clayey soil using the datasets which are obtained through realistic simulations of forested areas, gardens, grasslands, and bare lands being prepared for cultivated plants. It is found, through the numerical investigations and quantitative assessment, that the dielectric constant, electric conductivity and water content of the investigated clayey types of soil are accurately estimated. |
| Author(s): | M. Z. Ibrahim, A. I. Bahnacy, K. F. A. Hussein, A. E. Farahat |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 10896 KB |
| Title: | A Topological Charge Continuously Tunable Orbital Angular Momentum (OAM) Electromagnetic Wave Generation Method Based on Fixed-length Delay Line Mixing Circuit |
| Abstract: | To overcome the drawback of complex structure and high cost attributed from the utilization of phase shifters to generate OAM in the conventional schemes, this paper proposes a new method for generating OAM based on a fixed delay line. By deriving the proposed system with fixed delay line theoretically, the relationship between the frequency of the input signal on the delay line and the topological charge of the OAM is obtained, and the topological charge of the generated OAM can be controlled by controlling the frequency. Furthermore, this paper proposes a vortex beam pointing control method based on phased array scanning, so as to realize the beam steering of OAM. It is then verified by using electromagnetic simulation, and the simulation results show that the proposed method is feasible. The proposed method not only has the advantages of simple structure and low cost, but also can generate OAM with continuously adjustable topological charge by controlling the frequency, which has the functions of topological charge reconstruction and dynamic adjustment. |
| Author(s): | Y. Zhou, X. Li, K. Yao, Y. M. Huang, H. Jin |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1349 KB |
| Title: | Modeling the Performance Impact of Cubic Macro Cells Used in Additively Manufactured Luneburg Lenses |
| Abstract: | Finite Element Analysis (FEA) is used to determine the sensitivity of feed placement on a Luneburg lens (LL) having large scale cubic discretization of its permittivity distribution. This is of practical importance for lenses fabricated using additive manufacturing, allowing accurate prediction of performance, and potentially reducing overall print time. It is shown that the farfield relative side lobe level (RSLL) is most sensitive to this form of discretization, and the impact to multi-feed and single-feed applications is considered. It is shown that for single-feed applications, large cubic macro cells are beneficial and provide a RSLL above that achieved with the continuous and non-uniform shelled counterparts. |
| Author(s): | B. F. LaRocca, M. S. Mirotznik |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 1384 KB |
| Title: | A Highly Compact Sext-band Bandpass Filter with Simple Structure and Wide Bandwidth |
| Abstract: | A highly compact sext-band bandpass filter (BPF) is investigated in this paper, which adopts quadsection stepped impedance resonators (SIRs) along with a series of multiple open stubs. This quad-section SIRs are constructed by tri-section SIR loaded L-shaped resonator. To achieve compact size, the filter utilizes trisection SIR and is embedded in the double L-shaped resonators. A series of multiple open stubs are introduced to improve fractional bandwidth and the return loss. A sext-band BPF centering at 1.12, 2.12, 2.78, 5.59, 6.59 and 8.97 GHz has been designed and fabricated. This highly compact sext-band with wide bandwidth and simple structure is constructed on Rogers 4350 with a dielectric constant of 3.66 and a height of 0.508 mm. The overall size of the fabricated filter is 0.15λg ×0.16λg. Good agreements are observed between the simulated and measured results. |
| Author(s): | L. Bai, Y. Zhuang, Z. Zeng |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 10715 KB |
| Title: | Dynamic Characteristics Analysis of Magnetic Levitation Rotor Considering Unbalanced Magnetic Pull |
| Abstract: | The working principle of the motor can cause unbalanced magnetic pull (UMP) between stator and rotor unavoidably. Previous research about nonlinear vibration excited by UMP was focused on the rotor supported by traditional mechanical bearings or gas bearings. However, the magnetic levitation rotor is particular due to the low rigidity provided by the active magnetic bearing (AMB). UMP amplifies rotor vibration in the resonant zone and further excites the nonlinear electromagnetic force, thus producing different vibration phenomena. The paper calculates rotor orbit, spectra analysis, and time-history plot with numerical methods and studies the influence of the rotation speed, eccentricity, key control parameters, and UMP on rotor dynamics in detail. Results illustrate displacement response spectra of the magnetic levitation rotor are quite different from previous research results. The appearing frequency components are inducted by universal formulas in this paper. Furthermore, research shows a slight adjustment of the control parameters affect significantly harmonic components and vibration characteristics. The research results have practical reference significance for fault diagnosis, feature recognition, and controller optimization of the AMB-rotor system. |
| Author(s): | S. Zhang, Z. Chen, X. Lv, H. Yan, J. Wu, Y. Zhou |
| File Type: | Journal Paper |
| Issue: | Volume: 37 Number: 10 Year: 2022 |
| Download Link: | Click here to download PDF File Size: 3765 KB |