ACES Publication Search
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| Title: | ACES Journal March 2017 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 2125 KB |
| Title: | ACES Journal March 2017 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 108 KB |
| Title: | ACES Journal March 2017 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 12707 KB |
| Title: | Bandwidth Optimization of a Wideband Co-Co Antenna Array on a Thin Flexible Dielectric using HFSS® |
| Abstract: | This paper presents several novel techniques for designing a compact Co-Co antenna array for optimal performance over a broad frequency range of one and half octaves. The antenna was modeled and tested on 6 mil Polyimide composite, a thin, flexible, substrate, in order to meet size requirements. A slotting technique was used to increase both the impedance and gain bandwidth of the antenna. The final design produced an omnidirectional antenna with peak gain greater than 1 dBi and S(1,1) less than -8 dB over a frequency range of 2.8*F1. In order to make a manufacture-able antenna, the microstrip transmission line width was increased for co-axial feeding of the antenna with a second slotting technique. |
| Author(s): | J. D. Majkowski |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 2109 KB |
| Title: | Printed UWB Pacman-Shaped Antenna with Two Frequency Rejection Bands |
| Abstract: | In this paper, the design and analysis of microstrip-fed low-profile, compact ultra-wideband (UWB) monopole antenna with two band-notches characteristics is carried out. The antenna is mounted on a low-cost FR-4 substrate with dimensions of 25×38×1.6 mm3, and relative permittivity of 4.4. The original shape of the patch is circular with radius of 11.5 mm, and then a sector is removed from the patch (making it a Pacmanshaped antenna) to improve the impedance bandwidth. The proposed antenna provides an impedance bandwidth between 2.9-15 GHz with better than 10 dB return loss and has nearly an omni-directional radiation pattern. Additionally, the antenna can reject the interference from WiMAX (3.5 GHz center frequency) and WLAN (5.5 GHz center frequency). |
| Author(s): | S. Naser, N. Dib |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 1873 KB |
| Title: | Small-Size Tapered Slot Antenna (TSA) Design for use in 5G Phased Array Applications |
| Abstract: | The design and development of a compact tapered slot antenna (TSA) for the fifth generation (5G) phased array communications is described in this manuscript. The proposed low-profile TSA element is designed on a Rogers RT 5880 (?=2.2 and ?=0.0009) dielectric to work in the frequency range from 21 to 23 GHz. The configuration of the employed TSA antenna elements is composed of a slot-line flare from a small gap to a large opening, matching to free space’s wave impedance. Eight TSA elements with well-defined endfire radiation patterns have been used on the top portion of a mobile-phone PCB to form a 1×8 linear phased array. The TSA elements are fed by hockey-stick baluns. In addition, the radiation performance and SAR characteristics of the phased array 5G antenna in the vicinity of user’s hand & head have been investigated in this study. The results show that the proposed design provides good characteristics in terms of S-parameters, antenna gain, efficiency, SAR, and beam steering, which fit the need of 5G cellular communications. |
| Author(s): | N. O. Parchin, M. Shen, G. F. Pedersen |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 2330 KB |
| Title: | An Interdigital FSS based Dual Channel UWB-MIMO Antenna Array for System-in-Package Applications |
| Abstract: | In this paper, a miniaturized, dual channel Multiple Input Multiple Output (MIMO) antenna array is presented for Ultra Wideband applications. The array configuration is well suited for 3-D system-in-package applications. MIMO antennas are reported in two different configurations, i.e., back-to-back and orthogonal/corner. The array is designed on an FR-4 substrate of thickness 1 mm and compact dimensions of 40 mm × 35 mm. An Interdigital FSS based decoupling structure is analyzed and deployed to reduce mutual coupling between array ports. Simulated and measured results show that an isolation better than 20 dB is achieved over most of the band. More importantly, other performance criteria such as envelope correlation coefficient, total active reflection coefficient, channel capacity loss and gain also indicate that the proposed array is a potential candidate for UWB-MIMO applications. |
| Author(s): | M. Bilal, K. Khalil, R. Saleem, F. A. Tahir, M. F. Shafique |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 2316 KB |
| Title: | Design of Planar Differential-Fed Antenna with Dual Band-Notched Characteristics for UWB Applications |
| Abstract: | A planar differential-fed antenna with dual band-notched characteristics is presented for ultrawideband (UWB) applications. The proposed antenna mainly consists of two V-shaped radiating patches placed face to face and an octagonal slot ground plane. To avoid the potential electromagnetic interference from narrowband services, V-shaped slots embedded in the radiating patches are adopted to reject 5.5 GHz WLAN band, while T-shaped stubs connected with the radiating patches are introduced to filter 8 GHz ITU band. A prototype of the proposed antenna is fabricated and tested. Measured results demonstrate that the obtained impedance bandwidth is from 2.82 to more than 11 GHz, along with two notched bands of 4.83-6.12 GHz and 7.86-8.57 GHz. In addition, the proposed antenna exhibits good radiation patterns and stable gain. |
| Author(s): | W. Hu, Z. Tang, L. Zhou, Y. Yin |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 2048 KB |
| Title: | PSO Algorithm Combined with Parallel Higher-Order MoM to Compensate the Influence of Radome on Antennas |
| Abstract: | For the design and optimization of radome-enclosed antenna arrays, a fast numerical optimization algorithm is proposed to compensate the distortion error of radome-enclosed antenna arrays by correcting amplitude and phase of the excitations. Higher-order method of moments (MoM) is used to extract the eigen solution for each antenna element. In combination with the particle swarm optimization (PSO) algorithm, the antenna radiation characteristics can be quickly obtained by updating feeds, which avoid the repeated solution of the MoM matrix equation in the optimization process. Meanwhile, in the process of the eigen solution extraction, the use of the parallel technique significantly accelerates the solving of matrix equation. Finally, a radome-enclosed antenna array with 247,438 unknowns was optimized as an example, and the numerical results demonstrate effectiveness of the method. |
| Author(s): | C. Zhai, X. Zhao, Y. Wang, Y. Zhang, M. Tian |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 1740 KB |
| Title: | Two Dimensional Frequency-Angle Domain Adaptive Combined Interpolation Method for Electromagnetic Scattering Analysis of Precipitation Particles |
| Abstract: | A combined 2-D interpolation method is proposed for the efficient electromagnetic scattering analysis of precipitation particles over a broad frequency and angular band. This method combines the cubic spline interpolation method and the Steor-Bulirsch model. The cubic spline interpolation method is applied to model the induced current over wide angular band. The Steor-Bulirsch model is applied to accelerate calculation over wide frequency band. In order to efficiently compute electromagnetic scattering, sparsematrix/ canonical grid method (SM/CG) is applied to accelerate the matrix vector multiplication in EFIE. Therefore, the calculation time of frequency and angular sweeps become shorter. Numerical results demonstrate that this combined method is efficient for wide-band scattering calculation of precipitation particles with high accuracy. |
| Author(s): | J. Chen, J. Lin, Z. Liu, N. Li, P. Ping, X. Ping |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 1720 KB |
| Title: | Design of All-Dielectric Half-wave and Quarter-wave Plates Microwave Metasurfaces Based on Elliptic Dielectric Resonators |
| Abstract: | In this paper, we propose a numerical study for the design of Quarter-Wave Plate (QWP) and Half- Wave Plate (HWP) all-dielectric metasurfaces of relative permittivity 10.2, loss tangent 0.003 and thickness 5.12 mm. The devices based on Elliptic Dielectric Resonators (EDRs) may operate in the microwave band 20-30 GHz. First, we have studied the variation of the metasurface transmission, under x- and y-polarizations of the incident electric fields, when we vary the resonator ellipticity ? in the range 1:1.94. Next, we have optimized the resonator orientation (the rotation angle ? is situated in the range 0:45°) to improve further the moduli of transmission coefficients. Finally, from these previous parametric studies, we have designed QWP and HWP metasurfaces with the selected ellipticities ?1=1.4 and ?2=1.6. For example, we have obtained for ellipticity ?1 that the metasurface may acts as HWP device at frequencies 26.08 GHz and 28.03 GHz with bandwidths 175 MHz and 75 MHz, respectively and as QWP device at 29.02 GHz with a bandwidth of 150 MHz. In addition, the transmission bandwidths of HWP metasurface was increased from 75 to 225 MHz when we vary the rotation angle of the EDR from ?=0° to 10°. |
| Author(s): | A. Yahyaoui, H. Rmili, M. Sheikh, A. Dobaie, L. Laadhar, T. Aguili |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 2395 KB |
| Title: | Compact Differential Parallel Coupled Line Band-pass Filter with Open Stub |
| Abstract: | A novel differential narrow-band band-pass filter design method is presented based on the parallel coupled line and the open stub. Based on the transmission line model, the proposed differential bandpass filter is analyzed by using even- and odd-mode analytical method. The central resonant frequency of the proposed differential filter is given. The relations between the filtering performance and the impedance parameters are discussed. A compact differential band-pass filter is designed based on the resonant conditions. The common mode signal is well suppressed. The differential bandpass filter is simulated, fabricated and measured. The measured results and the simulated results are basically consistent. |
| Author(s): | D.-S. La, S.-Q. Jia, L. Cheng, X.-L. Ma |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 1607 KB |
| Title: | A Compact Dual-band Planar 4-Way Power Divider |
| Abstract: | In this paper, an optimized approach based on T-shaped step impedance transmission line is proposed to design a compact dual band 4-way planar power divider. In the proposed structure, the 100 ? quarter wavelength transmission lines are equaled by the Tshaped step impedance transmission lines (SITLs) which achieve the design equations with two freedom degrees. Then, the invasive weed optimization is used to find the optimized design parameters. Three power dividers with different operation frequencies ratio are designed and simulated to show the method ability. Finally, one 4-way planar power divider is fabricated and measured to verify the ability and power of the proposed approach which shows 53% compactness and proper specifications in both the operation frequencies. |
| Author(s): | A. Mahan, S. H. Sedighy, M. Khalaj-Amirhosseini |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 1544 KB |
| Title: | Compact Bandpass Filter with Sharp Out-of-band Rejection and its Application |
| Abstract: | A novel compact bandpass filter considered as the harmonic suppression circuit is designed in this paper. Because of the application of a T-shaped structure, the filter is improved in performance and reduced in size. Two transmission zeros at passband edge can be conveniently adjusted by changing the length of the open stubs located at the center of the T-shaped structure. Two filters with different open-stub structures are designed. Good agreement between the simulation and the measurement is acquired, which verifies the theoretical predictions. Benefiting from this feature, an active frequency multiplier with the proposed filter as the output matching network is designed. When input signal is set to be 6 dBm, output power of the second harmonic varies from 6 to 8 dBm with 20 dBc suppression for the first, third and fourth harmonics. |
| Author(s): | L. Zhou, Y.Z. Yin, W. Hu, X. Yang |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 1807 KB |
| Title: | A Robust Scheme for TD-MoM Analysis of Planar PEC Objects |
| Abstract: | A robust, fast and simple scheme for calculation of potential integrals that encountered singular terms in time domain integral equation (TDIE) for planar PEC scatterers in free space is presented. In this method singular terms of the potential integrals, like other terms, calculated numerically by selecting some points in the source and observation patches in TD-MoM solver. In fact this method cancelled dealing with the singularity of self-terms. The numerical integration of the potential integrals is almost two times faster than other methods that extracted or cancelled singularity of self-terms. Numerical results illustrate the accuracy and simulation time of the proposed technique. |
| Author(s): | A. Soltani, Z. H. Firouzeh, H. R. Karami |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 1776 KB |
| Title: | Sensorless Speed Control for Dual Stator Induction Motor Drive Using IFOC Strategy with Magnetic Saturation |
| Abstract: | A method of a sensorless indirect rotor-fieldoriented control of a dual stator induction motor with magnetic saturation is proposed in this paper. Magnetic characteristics of the dual stator induction motor indicate a nonlinear behavior. The computational electromagnetic dq model when the dual stator are fed by an independently current-controlled pulse width modulation (PWM) two identical three-phase voltage source inverters. By controlling the machine’s phase currents, harmonic elimination and torque ripple reduction techniques could be observed. The unbalanced current sharing between the dual stator winding sets is eliminated. High accuracy and performance is obviously demonstrated by comparing experimental and simulation results both in electromagnetic and dynamic features. |
| Author(s): | M. Ben Slimene, M. A. Khlifi, M. Ben Fredj |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 1607 KB |
| Title: | 3-D Defect Profile Reconstruction from Magnetic Flux Leakage Signals in Pipeline Inspection Using a Hybrid Inversion Method |
| Abstract: | In this paper, we propose a hybrid inversion approach to reconstruct the profile of arbitrary threedimensional (3-D) defect from magnetic flux leakage (MFL) signals in pipeline inspection. The region of pipe wall immediately around the defect is represented by an array of partial cylinder cells, and a reduced forward FE model is developed to predict MFL signals for any given defect. The neural network (NN) method is used at first to give a coarse prediction of the defect profile, and the prediction is then utilized as one original solution of the genetic algorithm (GA) to search for the global optimum estimate of the defect profile. To demonstrate the accuracy and efficiency of the proposed inversion technique, we reconstruct defects from both simulated and experimental MFL signals. In both cases, reconstruction results indicate that the hybrid inversion method is rather effective in view of both efficiency and accuracy. |
| Author(s): | J. Chen |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 1977 KB |
| Title: | Investigation on Mechanical and Magnetic Field Behaviors of GIB Plug-in Connector under Different Contact Conditions |
| Abstract: | In order to provide an effective detection method for internal contact fault of gas insulated bus (GIB), mechanical and magnetic field behaviors of GIB plug-in connector under different assembly conditions are analyzed by finite element (FEM) method in this paper. Contact forces on individual contact spots are obtained by mechanical field analysis then simulated by imperfect contact bridge models during electromagnetic field analysis. Magnetic field distributions around GIB plug-in connector under the various contact statuses (conductor insert depth and docking angle) are studied through numerical modeling and field testing. Results show that the mechanical contact parameters (contact forces and radiuses) of individual contact fingers vary from each other under the action of holding spring deformation and conductor gravity, and the surrounding magnetic field has strong relationship with the internal mechanical contact status. The magnetic field strength distributes uniformly around the GIB plug-in connector under well assembly condition. However, the magnetic field distorts since mechanical contact status is changed by the contact degradation or contact failure. |
| Author(s): | X. Guan, Q. Shen, M. Zou, N. Shu, H. Peng |
| File Type: | Journal Paper |
| Issue: | Volume: 32 Number: 3 Year: 2017 |
| Download Link: | Click here to download PDF File Size: 2488 KB |