ACES Publication Search
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| Title: | ACES Express Journal January 2018 Cover |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 2167 KB |
| Title: | ACES Express Journal January 2018 Front/Back Matter |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 303 KB |
| Title: | ACES Express Journal January 2018 Full |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 7159 KB |
| Title: | Assessment of ALEGRA Computation for Magnetostatic Configurations |
| Abstract: | A closed-form solution is described here for the equilibrium configurations of the magnetic field in a simple heterogeneous domain. This problem and its solution are used for rigorous assessment of the accuracy of the ALEGRA code in the quasistatic limit. By the equilibrium configuration we understand the static condition, or the stationary states without macroscopic current. The analysis includes quite a general class of 2D solutions for which a linear isotropic metallic matrix is placed inside a stationary magnetic field approaching a constant value Hi° at infinity. The process of evolution of the magnetic fields inside and outside the inclusion and the parameters for which the quasi-static approach provides for self-consistent results is also explored. It is demonstrated that under spatial mesh refinement, ALEGRA converges to the analytic solution for the interior of the inclusion at the expected rate, for both body-fitted and regular rectangular meshes. |
| Author(s): | M. Grinfeld, J. Niederhaus, A. Porwitzky |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 1614 KB |
| Title: | Far-Field Synthesis of Sparse Arrays with Cross-polar Pattern Reduction |
| Abstract: | This paper presents a fully deterministic iterative algorithm for the far-field synthesis of antenna arrays with reduction of the cross-polar component. The algorithm synthesizes the excitations as well as the positions of the array elements, providing a sparse geometry. Starting from an initial set of possible positions, the proposed algorithm iteratively solves a sequence of convex optimization problems. At each iteration a suitable objective function is minimized, which allows to reduce the number of radiating elements, among those of the initial set, in presence of constraints on the far-field co-polar and cross-polar patterns. The adopted formulation leads to a second order cone problem (SOCP), which is iteratively solved with CVX, a Matlab-based modeling system developed at the Stanford University and available on the Internet. |
| Author(s): | G. Buttazzoni, R. Vescovo |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 1631 KB |
| Title: | Compact Shaped Antennas for Wide-Band Radiogoniometry |
| Abstract: | In this paper, a wide band monopole antenna with a shaped profile is presented. Shaped profile and end-caps allow for a compact antenna with respect to wavelength. Antenna is designed to be as isotropic as possible and with low phase deviation from spherical wave front to allow accurate detection of the direction of arrival of an unknown signal when used in radiogoniometry applications. |
| Author(s): | A. Manna, G. Pelosi, M. Righini, L. Scorrano, S. Selleri, F. Trotta |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 1556 KB |
| Title: | RCS Results for an Electrically Large Realistic Model Airframe |
| Abstract: | The accuracy with which MLFMM, PO and PO with SBR can calculate the RCS of a realistic electrically large model airframe is investigated. The target has a maximum electrical length of 106 lambda. An accurate 3D numerical model of the target was created using a laser scanner. The numerical results are validated against data measured in a compact range. |
| Author(s): | C. Pienaar, J. W. Odendaal, J. C. Smit, J. Joubert, J. E. Cilliers |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 1901 KB |
| Title: | Measurements of Backscattering from a Dihedral Corner in a Reverberating Chamber |
| Abstract: | In this paper, the backscattering of a dihedral corner is evaluated by measurements accomplished within the reverberating chamber (RC) of the Università degli Studi di Napoli Parthenope, formerly Istituto Universitario Navale (IUN). The obtained results are found in good agreement with those of a previous very accurate model, whose validity was assessed by anechoic chamber measurements. |
| Author(s): | A. Sorrentino, G. Ferrara, M. Migliaccio, S. Cappa |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 1726 KB |
| Title: | Geometrical Scale Modeling of Gain and Echo Area: Simulations, Measurements and Comparisons |
| Abstract: | Geometrical scale modeling is often necessary to perform measurements of parameters and figures-of-merit of antennas and radar targets with large physical dimensions that cannot be accommodated in indoor and controlled experimental facilities. The measured and simulated parameters and figures-of-merit of the scaledmodels can then be translated to represent, if transformed properly, those of the full-scale models. In this paper, the basic theory is summarized which relates the gain and the echo area (RCS) of scaled models to those of their full-scale counterparts. Simulations and measurements are performed on scaled models, for both gain and RCS, and compared with those of full-scale models to verify the geometrical scaling. For the gain, a quarter-wavelength monopole on a scaled helicopter airframe, and for the RCS, a flat plate of complex configuration, are considered for simulations, measurements and comparisons. A very good agreement has been obtained for both gain and RCS between both sets of data. |
| Author(s): | C. A. Balanis, K. Zhang, C. R. Birtcher |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 1691 KB |
| Title: | Review of Recent Advances and Future Challenges in Antenna Measurement |
| Abstract: | This paper reviews the last advances in Antenna Measurement Field that took place during the previous years in order to analyse the challenges for the antenna measurement community, both industrial and academic, for the future years. The paper begins with an introductory review of the antenna measurement methodologies innovations, continuing with measurement systems technical improvements and concluding with the challenges for the antenna measurement community in the close future. |
| Author(s): | M. Sierra-Castañer |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 1558 KB |
| Title: | Specific Absorption Rate for Agri-Food Materials from Multiple Antenna Exposure |
| Abstract: | This paper presents an evaluation of the Specific Absorption Rate (SAR) in agri-food when it is exposed to wireless communication devices with multiple transmitting antennas. In particular, we model a simplified coconut which is exposed to antennas working at the frequency of 2.45 GHz. Two antenna configurations are being considered. One is a single dipole antenna, and the other is two co-polarized dipole antenna array. As a result, we observed that the SAR of the coconut for single antenna case is relatively smaller than that for multiple antenna one. |
| Author(s): | D. T. Le, B. Bisceglia |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 1546 KB |
| Title: | Hybrid Electromagnetic Modeling of Lens-Integrated Antennas for Non-Contact On-Wafer Characterization of THz Devices and Integrated Circuits |
| Abstract: | A hybrid full-wave/quasi-optical electromagnetic model for the design of lens-integrated THz antennas for high frequency non-contact device characterization (30 GHz – 3 THz) is presented. Experimental validation of the antenna properties (input impedance and radiation pattern) is also provided to demonstrate the accuracy of the proposed model. |
| Author(s): | C. Caglayan, G. C. Trichopoulos, K. Sertel |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 1529 KB |
| Title: | An Empirical Modeling of Electromagnetic Pollution on a University Campus |
| Abstract: | In this study, electric field strength (E) levels were measured on Ondokuz May?s University’s Kurupelit Campus and Faculty of Medicine Hospital in Samsun, Turkey between years 2013-2015. 840 short term and two long term measurements were performed using PMM–8053 and SRM–3006 at 60 different locations of which 30 were on both the campus and hospital. The results show that the measured E levels are far below the limits that are determined by ICNIRP. Based on the measurement analysis, a novel empirical model that allows characterizing the total E of medium using three main electromagnetic (EM) sources with 99.7% accuracy was proposed. Then other new models to estimate main distribution of total E were suggested. With the use of these models, E values of main pollution sources can be estimated with 95.2% accuracy and easily lead to prediction of future EM pollution levels. |
| Author(s): | C. Kurnaz |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 1609 KB |
| Title: | A Planar NF–FF Transformation for Quasi-Spherical Antennas using the Innovative Spiral Scanning |
| Abstract: | An effective probe compensated near-field– far-field (NF–FF) transformation with planar spiral scanning, using a minimum number of NF data, has been experimentally validated. It allows a remarkable measurement time saving, due to the continuous movements of the positioning systems and to the reduced number of needed NF data. Such a technique is based on a nonredundant sampling representation of the voltage acquired by the probe, obtained by using the theoretical foundations of the NF–FF transformations with spiral scans for quasi-spherical antennas. Then, the NF data needed by the plane-rectangular NF–FF transformation are efficiently recovered from those acquired along the spiral, via an optimal sampling interpolation formula. |
| Author(s): | F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 1913 KB |
| Title: | Gradient-Based Near-Field Antenna Characterization in Planar Geometry |
| Abstract: | A near field characterization technique, based on the optimization of the Singular Value Behavior, is here accelerated by using the analytical expression of the gradient of the relevant objective functional. This solution allows to conveniently tackle the cases of electrically large antennas. |
| Author(s): | A. Capozzoli, C. Curcio, A. Liseno |
| File Type: | Express Journal Paper |
| Issue: | Volume: 33 Number: 1 Year: 2018 |
| Download Link: | Click here to download PDF File Size: 1695 KB |