Advanced Electromagnetics <div class="hometabscontainer"> <div style="float: left;"> <table> <tbody> <tr> <td align="left" valign="top"> <p><a href="/images/aem_cover_new.png"><img class="img-responsive" style="border: 0px;" src="/images/aem_cover_mini_new.png" alt="" width="150"></a></p> <p style="text-align: center;"><strong style="text-align: center;">ISSN: 2119-0275</strong></p> </td> </tr> </tbody> </table> </div> <div><strong><br>Advanced Electromagnetics</strong>&nbsp; is a peer-reviewed open access journal that publishes original research articles as well as review articles in all areas of electromagnetics. <p>Additionally, through its unique <em>from-Conference-to-Journal-Publication </em>concept, <strong>Advanced Electromagnetics</strong>&nbsp;offers a rare opportunity for authors to submit papers to one of its partner conferences and then be considered for journal publication. With its multi-layered review process, <strong>Advanced Electromagnetics</strong>&nbsp;helps authors prepare, improve, and timely publish their research papers.</p> <p>Publication in this journal <strong>is totally free</strong>. There are no article submission charges, no article processing charges and no publication fees.</p> <p>&nbsp;</p> </div> <p><img class="img-responsive" src="/images/indexing.jpg" alt=""></p> <h3><span style="color: #336699;">Scopus rating (2016) for Advanced Electromagnetics</span></h3> <p><img class="img-responsive" src="/images/aem-scopus.png" alt="" width="100%"></p> </div> en-US <p>Authors who publish with this journal agree to the following terms:</p><ol><li style="text-align: justify;">Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a <a target="_blank">Creative Commons Attribution License</a> that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.</li><li style="text-align: justify;">Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li><li style="text-align: justify;">Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See <a target="_blank">The Effect of Open Access</a>).</li></ol> (AEM Editorial Team) (AEM Support) Mon, 29 Jan 2018 13:39:35 -0500 OJS 60 A Prototype Model Design of Wide Band Standard Reference Rod-Dipole antenna for 3-Axis EMC Measurement with hybrid Balun for 0.9 to 3.2GHz <p class="Abstract"><span lang="EN-US">Every electronics equipment must deal with EMC test. The testing laboratory of electronics equipment for radiation emission must have accurate calibrated antennas. The field strength of total radiated radio frequency is average of all incident signals at given point, this incident spinals originates from various directions. In order to measure three components of all electric field vectors, a tripole antenna is most beneficial over conventional antenna because of it responds to signal coming from multi directions. This paper presents novel three axis wide band calculable rod-dipole antenna with hybrid balun for the range of 900MHz to 3.2GHz frequencies, the proposed antenna is small in size and good electrical characteristics, the Important parameters measured and verified with designed values. Return loss S11 more than -10dB within the frequency range 900MHz to 3.2GHz. The result of this articles are evident that, efficient construction of antenna with low cost, light weight module applicable for EMC pre-compliance test at open field site.</span></p> S. Patil, P. Petkov, B. Bonev ##submission.copyrightStatement## Wed, 14 Feb 2018 11:41:14 -0500 Analytical results for rotating and linear magnetic brakes <p>A theory of magnetic damper (eddy-current brake) which can be applied to axial-flux rotating and linear systems moving under the influence of an arbitrary arrangement of magnetic poles is derived from basic electromagnetic principles. Analytical expressions for the braking forces and torques are obtained in the low-velocity limit <br>of the moving nonmagnetic conductor.</p> J. A. Redinz ##submission.copyrightStatement## Tue, 13 Feb 2018 12:31:51 -0500 Jamming Efficacy of Variable Altitude GPS Jammer against Airborne GPS Receiver, Theoretical Study and Parametric Simulation <p class="BodyTextKeep" style="page-break-after: auto;"><span style="font-size: 10.0pt;">Satellite-based navigation systems, as one of the key infrastructure of development in manned and unmanned guidance systems, is vulnerable against the simplest form of attack in Electronic Warfare environments. This led us to investigate the described vulnerability of an airborne GPS receiver against jammers which are located at various altitude above the targeted point. To do that and to avoid encountering with unavailability of classified information about military-class missiles, some simplification was done and the problem was investigated in “Worst Case” conditions. Finally, the flight profile and radiation pattern of the antenna of the GPS receiver were theoretically modeled. Considering some assumptions, the other parameters were derived from them. At the end, a simulation software was developed and some results were extracted. The data was represented figuratively and the dependency of efficacy of jamming operation to the jammer’s altitude and flight profile of the missile were discussed.</span></p> A. Esmaeilkhah; N. Lavasani ##submission.copyrightStatement## Sat, 10 Feb 2018 12:14:50 -0500 Design of Non-Uniformly Spaced Circular Arrays of Parasitic Dipoles for Lower Side Lobe Level with Maximum Directivity <p>This paper presents a new approach for circular array of parasitic dipoles composed by one active dipole for reduction of side lobe level with maximum directivity including mutual coupling. The desired goal is obtained by changing the spacing between the parasitic elements and length of the parasitic elements while the position and length of driven element is fixed. In addition to it, reflection coefficient (<em>RC</em>) of the driven element is kept closer to the specified value. Matlab based method of moment code is used to evaluate the performance of circular antenna designs generated by QPSO algorithm. Two examples are presented to show the effectiveness of this proposed approach.&nbsp;&nbsp;</p> H. Patidar, G. K. Mahanti ##submission.copyrightStatement## Sat, 10 Feb 2018 09:20:35 -0500 Probabilistic Assessment of Lightning Related Risk of Transmission Lines Based on Frequency Dependent Modeling of Tower-Footing Grounding System <p>This paper presents a probabilistic evaluation, based on Monte-Carlo method, for the estimation of insulation risk of failure of overhead transmission lines (<em>TLs</em>). The proposed method takes into account the wide-band model of tower-footing grounding system. The wide-band model of grounding system in frequency domain is obtained by the method of moment solution to the governing electrical field integral equations. The electrical parameters of soil are considered to be either constant or frequency dependent. The time-domain representation of the grounding system is inferred through pole-zero characterization of its associated frequency response. The case of a typical 400-kV transmission line is modelled in EMTP_RV with the tower-footing grounding system integrated with the transmission line (<em>TL</em>) system. The results of the paper show that the failure risk of transmission lines is affected by the grounding system model. This effect is more pronounced when the soil electrical parameters are assumed to be frequency dependent.</p> J. Gholinejhad, R. Shariatinasab, K. Sheshyekani ##submission.copyrightStatement## Sat, 10 Feb 2018 07:25:06 -0500 Analytical Approximation for the Inductance of Circularly Cylindrical Two-Wire Transmission Lines with Proximity Effect <p class="BodyTextKeep">The paper describes a simple analytical approximation for the inductance of two-wire transmission lines of circularly cylindrical wires with proximity effect. It yields precise results up to very high frequencies, and also at all interaxial distances between the wires above some limit. Its accuracy is established by comparison to numerical computations and to measurements. It is shown that the proximity effect cannot be neglected unless the interaxial distance between the wires amounts to at least four wire diameters. Further, images of the current distribution in various situations are discussed.</p> H. A. Aebischer, H. Friedli ##submission.copyrightStatement## Wed, 31 Jan 2018 05:39:55 -0500 A Planar UWB Antenna with Dual Band Rejection Capability Using Double Rotated ESRRs <p>In this paper, CPW-Fed ultra wideband (UWB) planar monopole antenna (PMA) loaded by double elliptical split ring resonators (ESRRs) for double band-notch characteristics is introduced and examined. Two different ESRRs with different dimensions are printed in the antenna backside to notch two different frequencies. The ESRRs are also rotated and the corresponding return loss effect is examined. &nbsp;Different notch frequencies can be obtained by varying the ESRRs, dimensions. Two single SRRs are used to notch two frequencies instead of using dual SRR pairs. Two notch frequencies at 5.2 GHz and 6.9 GHz has been obtained to notch WLAN and C-band wireless applications, respectively. A directive radiation pattern in E-plane and omnidirectional radiation patterns in the H-plane could be observed. Also the gain is suppressed in the notch frequencies. The group delay is nearly stable in the UWB frequency range, except at the notch frequencies, which is distorted sharply. So, the proposed antenna is a good candidate for the modern UWB systems. Finite element method FEM and finite integration technique FIT are used to simulate the proposed structures through the usage of Ansys HFSS and CST MWS. Very good agreement between both results has been obtained.</p> A. S. Elkorany, G. T. Ahmed, Eng., D. A. Saleeb, Dr. ##submission.copyrightStatement## Mon, 29 Jan 2018 15:47:34 -0500 Electromagnetic Wave Absorption Properties of Novel Green Composites Coconut Fiber Coir and Charcoal Powder over X-band Frequency for Electromagnetic Wave Absorbing Applications <p class="BodyTextKeep" style="page-break-after: auto;"><span style="font-size: 10.0pt;" lang="EN-US">This paper presents the electromagnetic wave (EW) absorption properties in terms of complex permittivity and permeability of novel green composites coconut fiber coir and charcoal powder materials. The samples were fabricated using the raw agricultural waste coconut fiber coir, charcoal powder, epoxy resin and hardener with varied composition. The dielectric properties of the materials were characterized using two-port waveguide measurement method over the X-band frequency (8.2 – 12.4GHz). The average permittivity value measured is approximately 3.00 with 10wt% charcoal has the highest permittivity of 3.59. Apart from that, all samples exhibit good reflection loss of better than -25dB which means more than 99% absorption rate. The result shows the composite material is a promising organic material for electromagnetic absorber applications.</span></p> N. F. N. Yah, H. A. Rahim, Y. S. Lee, F. H. Wee, H. H. Zainal ##submission.copyrightStatement## Mon, 29 Jan 2018 15:17:18 -0500 Multiband and Miniaturized dual layer Antenna incorporated with FSS and DGS <p>A novel dual&nbsp; layer rectangular printed Antenna based on loop type Frequency selective surfaces with five concentric rings and I shaped defected ground structure (DGS) is designed and investigated. The deigned antenna is tested for application in C band, WiFi devices and some cordless telephones and X band radiolocation, airborne and naval radars as multiband&nbsp; operational frequencies are at 5.5GHz, 6.81GHz, 9.3GHz and thus covers two wireless communication band C Band (4 to 8GHz ) and&nbsp; X band (8 to 12 GHz) The bandwidth is 200MHz, 300MHz and 1GHz respectively and measured gain of this designed antenna are 2.42dBi against 5.5GHz, 2.80dBi against 6.81GHz, 6.76dBi against 9.3GHz. The proposed antenna in addition to multiband operation also exhibits minituarization.The Floquet port technique is used to analyse concentric rings. The Results comparison of proposed structure with the basic dual layer antenna resonaing at 5.5GHz &nbsp;shows the patch area is reduced by 58.15% while the volume of the antenna is reduced by 81.5%.&nbsp;</p> S. Sah, M. R. Tripathy, A. Mittal ##submission.copyrightStatement## Mon, 29 Jan 2018 13:33:05 -0500 Tunable Elliptical Split Ring Resonator Using Single Varactor Diode <p>In this paper, the effect of changing the structure of split ring resonator SRR from circular to elliptical shape is presented and tested. The theoretical analysis of circular SRR (CSRR) is tested and its results are compared with the simulated ones. Comparison between both configurations is introduced. The new elliptical SRR (ESRR) can be adapted to operate in multi range of frequencies. The effect of gap position in ESRR resonant is also examined. When both gaps are moved but still aligned, the resonant frequency still the same. But when single gap is moved only the resonant frequency the resonant frequency in changed to reach its maximum value when both gaps are in the same position. Frequency tunability can be offered by loading a single variable capacitor between ESRR metallic rings.&nbsp; The resonant frequency of the ESRR can be controlled by varying the capacitance of the varactor diode. Finite element method FEM is used to simulate the proposed structures using HFSS.</p> A. S. Elkorany, G. Ahmed, D. Saleeb, H. A. Mohamed ##submission.copyrightStatement## Mon, 29 Jan 2018 00:00:00 -0500