ACES Publication Search
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| Title: | ACES Express Journal March 2016 Cover |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 3 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 1067 KB |
| Title: | ACES Express Journal March 2016 Front/Back Matter |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 3 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 299 KB |
| Title: | ACES Express Journal March 2016 Full |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 3 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 7199 KB |
| Title: | Half-Loop Segmented Antenna with Omnidirectional Hemispherical Coverage for Wireless Communications |
| Abstract: | Segmented antennas loaded with reactance elements at the junctions between segments provide additional parameters for shaping antenna characteristics. The design procedure consists of first, circuit analysis of the multiport antenna description to determine the initial values of the lumped element reactances and second, of fine tuning the antenna dimensions full-wave simulation software. Measured results show that a good matching and an omnidirectional radiation pattern in the vertical plane is maintained up to ? = 70º with a circular ground plane of 1m diameter. |
| Author(s): | P. Nayeri, A. Z. Elsherbeni, R. Hasse, D. Kajfez |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 3 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 3895 KB |
| Title: | Computational Electromagnetic Modelling of Compact Antenna Test Range Quiet Zone Probing |
| Abstract: | This paper extends the authors previous simulation study [1, 2] that predicted the quality of the pseudo plane wave of an offset compact antenna test range (CATR). In this paper, the quiet-zone performance predictions are extended to rigorously incorporate the effects of probing the CATR quiet-zone using various field probes. This investigation leads to recommendations as to the optimal field probe choice and measurement uncertainties. The results of these new simulations are presented and discussed. |
| Author(s): | C. G. Parini, R. Dubrovka, S. F. Gregson |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 3 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 1731 KB |
| Title: | Enhanced Artificial Immune System Algorithm and Its Comparison to Bio-Inspired Optimization Techniques for Electromagnetics Applications |
| Abstract: | This paper introduces an enhanced artificial immune system algorithm (EAIS) that benefits from a hybrid approach by integrating concepts from the genetic algorithm (GA) and particle swarm optimization (PSO). The potential of the EAIS algorithm is demonstrated by comparing its performance with other bio-inspired optimization algorithms; namely the particle swarm optimization (PSO) and the conventional artificial immune system (AIS) when applied to two electromagnetics applications, such as the design of antireflective surfaces, and microstrip electromagnetic band gap (EBG) structures. |
| Author(s): | O. Kilic, Q. M. Nguyen |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 3 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 3129 KB |
| Title: | Experimental Benchmarking of Unstructured Transmission Line Modelling (UTLM) Method in Modelling Twisted Wires |
| Abstract: | In this paper the Unstructured Transmission Line Modelling (UTLM) method based on a tetrahedral mesh has been applied to modelling of the coupling between a single wire and a twisted wire pair. The effects of wire twisting on the crosstalk and coupling between wires are modelled by explicitly meshing wire geometries; simulation results are compared with experimental ones. Excellent agreement between simulated and measured results validates the viability and accuracy of the UTLM method and indicates the potential of the UTLM method for modelling complex wire structures. |
| Author(s): | X. Meng, P. Sewell, N. H. A. Rahman, A. Vukovic, T. M. Benson |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 3 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 2949 KB |
| Title: | Four-Stage Split-Step 2D FDTD Method with Error-Cancellation Features |
| Abstract: | We develop a methodology that enables the proper introduction of high-order spatial operators in an unconditionally-stable, split-step, finite-difference timedomain scheme. The proposed approach yields spatial approximations that guarantee better balancing of space-time errors, compared to standard fourth-order expressions. The latter are not as efficient as expected, due to their unmatched order with the scheme’s secondorder temporal accuracy. Our technique treats the dispersion relation as an error descriptor, derives spatial formulae that change with the cell shape and time-step size, and rectifies the performance over all frequencies. |
| Author(s): | T. T. Zygiridis, N. V. Kantartzis, T. D. Tsiboukis |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 3 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 3354 KB |
| Title: | A 3-D Polynomial-Chaos FDTD Technique for Complex Inhomogeneous Media with Arbitrary Stochastically-Varying Index Gradients |
| Abstract: | An enhanced finite-difference time-domain algorithm featuring the polynomial chaos representation is introduced in this paper for problems with stochastic uncertainties. Focusing on the solution of the governing partial differential equations, the new 3-D method uses the Karhunen-Loève expansion to effectively decorrelate random input parameters denoted by stochastic processes. So, the space dimension is seriously reduced and high accuracy levels are attained, even for media with abrupt and fully unknown statistical variations. These profits are verified via a detailed numerical study. |
| Author(s): | G. G. Pyrialakos, T. T. Zygiridis, N. V. Kantartzis |
| File Type: | Express Journal Paper |
| Issue: | Volume: 1 Number: 3 Year: 2016 |
| Download Link: | Click here to download PDF File Size: 6223 KB |