ACES Publication Search
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| Title: | ACES Journal February 2015 Cover |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 2707 KB |
| Title: | ACES Journal February 2015 Front/Back Matter |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 35 KB |
| Title: | ACES Journal February 2015 Full |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 9633 KB |
| Title: | Comparison of Calculation Methods of Braided Shield Cable Transfer Impedance Using FSV Method |
| Abstract: | This paper presents the results of recent work based on finite element numerical modeling in Ansoft HFSS to predict the surface transfer impedance of braided coaxial cables. Two approaches to the cable 3D modeling are investigated: (1) a simplified structural model, and (2) a rigorous structural model of braided shielded cable which is designed in Pro/Engineer software. The proposed approach provides a robust method that can overcome the challenges in the existing theoretical analysis. Factors influencing the cable transfer impedance are analyzed in detail. The validity of this simulation method is verified by comparison with a new measurement method based on time-domain response of two cable samples. The reliability of these two sets of data is analyzed by use of the feature selective validation method |
| Author(s): | J. Bai, G. Zhang, L. Wang, A. Duffy, C. Liu, T. Shao |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 641 KB |
| Title: | Hybrid IE-DDM-MLFMA with Gauss-Seidel Iterative Technique for Scattering from Conducting Body of Translation |
| Abstract: | In this paper, a hybrid Integral Equation-Domain Decomposition MethodMultilevel Fast Multipole Algorithm (IE-DDMMLFMA) with Gauss-Seidel iterative technique is proposed to calculate the scattering from perfectly electric conducting Body of Translation (BoT). The BoT can be partitioned into translational nonoverlapping sub-domains. A hybrid local/global MLFMA framework is adopted to realize efficient matrix-vector multiplication in sub-domains and between sub-domains by utilizing the feature of translational invariance of BoT. To reduce the number of interactions between sub-domains, Gaussian-Seidel iterative technique is applied. Numerical examples are presented to demonstrate the efficiency of the present method. |
| Author(s): | M. Jiang, J. Hu, R. Zhao, X. Wei, Z. Nie |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 706 KB |
| Title: | An Improved MLPG Method and Application in the Calculation of Electro-Thermal Field of Transmission Line |
| Abstract: | An improved local Petrov-Galerkin method (MLPG) is proposed to solve the general electro-thermal problems in the paper, in which the method to determine the support domain is improved. Two electro-thermal problems are analyzed and solved with the method in the paper, the results indicate that the precision of the final solution is increased. In addition, the electrothermal field and ampacity of ±800kV ultra high voltage direct current (UHVDC) transmission line are calculated, great accuracy of the solution to the electro-thermal coupling problem is obtained. Results indicate that the maximum and minimum value of surface electric field intensity on each subconductor lies on the inner and outer surface, the ampacity of transmission line varies almost linearly with environment temperature inversely. |
| Author(s): | B. Gao, F. Yang, M. Chen, P. Duan, Q. Peng, Y. Yang |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 1295 KB |
| Title: | Truncation Error Analysis of a Pre-Asymptotic Higher-Order Finite Difference Scheme for Maxwell's Equations |
| Abstract: | Pre-asymptotic higher-order methods are useful to the mitigation of numerical dispersion error in large-scale Finite-Difference Time-Domain (FDTD) simulations. Its truncation error is shown in this study to be 2 2 O O () () :: t s in general. In the limiting case where the CourantFriedrichs-Levy number approaches to zero, it becomes 2 4 O O () () :: t s . |
| Author(s): | Y. Shao, S. Wang |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 164 KB |
| Title: | Development of Diplexers Based on Dual-Mode Substrate Integrated Waveguide Cavities |
| Abstract: | Diplexers based on dual-mode Substrate Integrated Waveguide (SIW) cavities are proposed and implemented. The dual-mode cavities not only act as a resonator for both Rx and Tx channels, but also as the interconnect between these two channels which help to realize the isolation. The dual-mode cavities resonating at TE201 and TE103 modes in our design show several advantages than those dual-mode cavities operating at TE201 and TE301 modes. Single-mode cavities are cascaded with the dual-mode cavity to realize the two-order filters for Rx and Tx channels. Two design examples are presented with a normal printed circuit board process and verified by experiments. |
| Author(s): | H. Chu, R. Mao, J.-X. Chen |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 874 KB |
| Title: | UWB Monopole Antenna with Dual Band-Notched Function |
| Abstract: | In this letter, an Ultra-Wideband (UWB) monopole antenna with dual frequency band-stop performance is designed and manufactured. In the proposed structure, by inserting an S-shaped parasitic structure inside a square slot in the ground plane a new resonance at higher frequencies can be achieved, which provides a wide usable fractional bandwidth of more than 125%. In order to generate dual bandnotched function, we use four L-shaped strips protruded inside square ring. The measured results reveal that the antenna offers a very wide bandwidth from 2.63 to 14.2 GHz with two notched bands covering all the 5.2/5.8 GHz WLAN, 3.5/5.5 GHz WiMAX and 4 GHz C bands. Good VSWR and radiation pattern characteristics are obtained in the frequency band of interest. |
| Author(s): | Y. Ojaroudi, S. Ojaroudi, N. Ojaroudi |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 523 KB |
| Title: | UWB-MIMO Quadruple with FSS-Inspired Decoupling Structures and Defected Grounds |
| Abstract: | In this paper, a quad element Ultra Wideband Multiple-Input Multiple-Output (UWB-MIMO) antenna system is presented. The proposed design is compact as it has four semielliptical shaped antennas along with the decoupling structures, fabricated on a compact substrate. The substrate employed is a low cost FR-4 laminate. The antenna elements are decoupled by employing Defected Ground Structures (DGS) and structures inspired from Frequency Selective Surfaces. An enhanced impedance match over lower to medium band is achieved by introducing dipole-like parasitic stubs on rear sides of the antennas. Measured results show that the isolation achieved by the proposed design is more than 20 dB over desired frequency band. |
| Author(s): | T. Shabbir, R. Saleem, A. Akram, F. Shafique |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 1186 KB |
| Title: | A Novel U-Shaped Parasitic Asymmetric Microstrip Cap Loaded Compact Patch Antenna |
| Abstract: | A novel electromagnetically short antenna with parasitic microstrip cap shape is shown in this paper. The antenna is composed of a U-shaped parasitic microstrip line (cap) excited by coupling with the feed line at patch. The antenna is fabricated in FR4 substrate with dielectric constant, ?r=4.55 and thickness of 1.6 mm. Optimization of the proposed antenna is done using modified Particle Swarm Optimization (PSO) algorithm in ZELAND IE3D software environment. That gives resonance at selected frequencies and increased gain than the initial design. By using circular slot at the ground plane with miniaturized structure, dualband covering 5.29 GHz to 5.89 GHz (C-band) and 7.93 GHz to 8.86 GHz (X-band) is achieved. A fractional bandwidth of 10.74% at C-band and 11.08% at X-band is achieved. A measured gain of 5.65 dBi and 6.61 dBi is achieved at C-band and Xband respectively, with a circular polarization. Gain improvement is achieved compared to the initial design by more than 2 dBi (average) in the selected frequency for the given resonance using modified PSO optimization. |
| Author(s): | M. R. Zaman, M. T. Islam, S. Kibria |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 1018 KB |
| Title: | Wideband Power Divider Using Novel Split-Ring Resonator |
| Abstract: | A set of novel split-ring resonator basic block Hybrid-Microwave Integrated-Circuit (HMIC) components (transmission line, open and short stubs) is presented with applications to the RF/Microwave power divider. This new open and short LH HMIC resonators have compact sizes of 0.81 and 1.44 mm2 , respectively. The prototypes of an LH power divider constructed from these basic components have been designed, fabricated, and characterized. The LH power divider including two LH branches shows equal power split from 1 to 7 GHz. The proposed power divider benefit from the miniaturized LH HMIC components and have compact sizes of 2.205 mm2 , respectively. There is a good agreement between the full-wave simulations and measurement results with 0.254-mm thick RT5880 substrate. While maintaining similar performance, a 50% reduction in impedance transformer is achieved in comparison to a conventional design. |
| Author(s): | T. Huang, D. Jiang, H. Hu |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 235 KB |
| Title: | Circular Ring Optically Transparent Antenna for Ultra-Wideband Applications |
| Abstract: | This paper presents the results of a simple and novel optically transparent UltraWideband (UWB) antenna consisting of a coplanar waveguide fed circular ring-shaped monopole that is constructed on a transparent conductive Indium Tin Oxide (ITO) film. The proposed antenna exhibits an impedance bandwidth of 163% between 2 to 20 GHz, which exceeds Federal Communication Commission’s UWB frequency range, with a return-loss performance more than 10 dB. The antenna radiates omni-directionally in the H-plane and bidirectionally in the E-plane. The measured results confirm the antenna is a feasible proposition for integration with various ultra-wideband applications requiring transparent aesthetics. Details of the antenna design, simulation and measurement results are presented. |
| Author(s): | M. R. Haraty, M. Naser-Moghadasi, A. Lotfi-Neyestanak, A. Nikfarjam |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 777 KB |
| Title: | A New Meandered-Stripline Fed Dual Band Patch Antenna |
| Abstract: | A new circular shaped patch antenna loaded with vertical slots and fed by meanderedstripline on a high dielectric material substrate is proposed in this paper, and experimentally verified the performance of the printed prototype. With the deployment of meandered-stripline structure to excite in the assistant of partial ground plane, the experimental results show that the proposed antenna has achieved wider bandwidth with satisfactory gain. The measured impedance bandwidth (voltage wave stand ratio, VSWR <= 2) of the proposed antenna at lower band is 400 MHz (600 MHz - 1 GHz) and at upper band is 700 MHz (2.25 GHz - 2.95 GHz). The peak gains of -1.18 dBi and 4.87 dBi have measured with topmost radiation efficiencies of 82.0% and 92.6% and have observed at lower band and upper band respectively. The performance criteria and almost consistent radiation pattern make the proposed antenna as a suitable candidate for UHF RFID, WiMAX and WLAN applications. The designing of antenna model and the parametric study have been performed with commercially available EM simulation software on 64-bit windows PC. The proposed antenna model has been validated by comparing the obtained experimental results with the output from the numerical simulation and apparently shows good agreement between them. |
| Author(s): | M. R. Ahsan, M. T. Islam, M. H. Ullah |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 838 KB |
| Title: | Design of a Compact Planar Antenna for Ultra-Wideband Operation |
| Abstract: | In this paper, a new compact planar antenna is proposed for UWB (Ultra-wideband) operations. The proposed antenna has a low profile structure, consisting of a radiating patch, notched ground plane, and a novel arc-shaped strip connected between the microstrip feed line and the radiating patch. By using the proposed structure, broadband antenna with good impedance matching is obtained. Measured results show that the antenna can achieve a bandwidth of 96.22%. The proposed antenna is optimized in order to satisfy the required band with a good radiation pattern. The fabricated antenna has a compact size of 16 20 1.6 mm3 . These features demonstrate that the proposed antenna is a suitable candidate for UWB applications, due to its simple configuration, compactness, and low fabrication costs. |
| Author(s): | M. N. Shakib, M. Moghavvemi, W. N. L. Mahadi |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 471 KB |
| Title: | Pattern Synthesis for a Conformal Array Antenna Mounted on a Paraboloid Reflector Using Genetic Algorithms |
| Abstract: | In this article a 12x1 conformal array antenna is designed for Identification Friend or Foe (IFF) applications. Using Genetic Algorithm (GA), the phase and amplitude weights of each element mounted on a paraboloid reflector surface is calculated. To have a broadband array with adjusted integrated balun, an optimized printed dipole is chosen as an array element. The effect of mutual coupling between the elements is taken into account through using the Multi-Level Fast Multipole Method (MLFMM). The gain of the antenna is about 15.4 dBi with a 3 dB beam width of 67 and 12 in the two principal planes. Also, the side lobe level of the H-plane pattern is below -25 dBi. |
| Author(s): | M. A. N. Fakher |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 678 KB |
| Title: | An Efficient Approach for Reducing the Complexity of Reconfigurable Antennas |
| Abstract: | This paper proposes a new method of characterizing reconfigurable antennas for reducing its complexity while still maintaining its reconfigurability. |
| Author(s): | C.-Y. Wu, Y.-P. Ma, J. Xu |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 637 KB |
| Title: | Liquid Crystal-Based Dielectric-Loaded Plasmonic Ring Resonator Filter |
| Abstract: | A new tunable plasmonic filter based on liquid crystal dielectric loaded plasmonic waveguide is proposed and studied. |
| Author(s): | S. M. Alavi, H. Armand |
| File Type: | Journal Paper |
| Issue: | Volume: 30 Number: 2 Year: 2015 |
| Download Link: | Click here to download PDF File Size: 697 KB |