Advanced Electromagnetics http://www.aemjournal.org/index.php/AEM <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> contact@aemjournal.org (AEM Editorial Team) contact@aemjournal.org (AEM Support) Sun, 22 Oct 2017 07:08:50 -0400 OJS 3.1.0.0 http://blogs.law.harvard.edu/tech/rss 60 Modification of the transmission spectrum of the ”semiconductor-dielectric” photonic crystal in an external magnetic field http://www.aemjournal.org/index.php/AEM/article/view/511 <p>In this paper, some features of electromagnetic transmission of the waves of ”semiconductor dielectric” periodic Bragg structure with a finite number of periods have been investigated. In the absence of absorption, for a structure with p-type semiconductor layers, we have analyzed the dependences on the external magnetic field of photon spectrum and transmission coefficient spectrum. It has been shown that with an increasing magnetic field, there is a significant narrowing of bandwidth and broadening of band gaps, as well as formation of new band gaps in the resonance region. The boundaries of all forbidden and allowed bands are shifted to higher frequencies with the increase of the angle of radiation incidence.</p> S. V. Eliseeva, I. V. Fedorova, D. I. Sementsov ##submission.copyrightStatement## http://www.aemjournal.org/index.php/AEM/article/view/511 Mon, 27 Nov 2017 08:45:37 -0500 The Electromagnetic Considerations of the Nuclear Force http://www.aemjournal.org/index.php/AEM/article/view/665 <p>This paper explores how the electromagnetic energies of the quarks within the nucleus affect the behavior of the nuclear force. By examining the electromagnetic energies and forces, many questions about nuclear behavior can be answered and many insights into the nucleus can be gained. Previous theoretical models for the nuclear force include only the Coulomb electric forces, but with a disregard of the electromagnetic characteristics of the quarks. By incorporating the electromagnetic energies and forces into nuclear theory, this model has been able to achieve predictions of binding energy better than any previous model, doing so by using only one variable instead of five. This model also directly unifies the nuclear force to the electromagnetic force.</p> N L Bowen ##submission.copyrightStatement## http://www.aemjournal.org/index.php/AEM/article/view/665 Tue, 14 Nov 2017 06:42:30 -0500 Low Side Lobe Tapered Slot Antenna with High Gain Using Gradient Refractive Index Metamaterial for Ultra Wideband Application http://www.aemjournal.org/index.php/AEM/article/view/575 <p>A broadband gradient refractive index (GRIN) metamaterial is used to improve the gain of the tapered slot antenna. The proposed metamaterial is capable of reducing the side lobe level of the antenna. The gradient refractive index (GRIN) metamaterial is constructed by using non-resonant parallel-line unit cells with different refractive index. Due to the non-resonant structure, the proposed unit cell exhibits low loss and large frequency bandwidth. The metamaterial, whose effective refractive index is lower than that of the substrate on which the antenna is printed. Therefore, the proposed metamaterial is act as a regular lens in beam focusing. The GRIN metamaterial is integrated in front of the antenna which has the capability to manipulate electromagnetic wave accurately. The measurement results indicate that the reflection coefficient of the antenna is below -10 dB over the frequency band from 3 to 11 GHz. The radiation pattern of the antenna shows the beam width becomes narrow and directive with low side lobe level. The peak gain is increased by 2.1 dB at 9.5 GHz.</p> R. Singha, D. Vakula ##submission.copyrightStatement## http://www.aemjournal.org/index.php/AEM/article/view/575 Wed, 08 Nov 2017 16:32:38 -0500 A simple numerical experiment of Green's function expansion in the Fast Multipole Method http://www.aemjournal.org/index.php/AEM/article/view/574 <p>In this paper the theoretical foundation of the fast multipole method applied to problems involving electromagnetic scattering is briefly&nbsp;presented, the truncation of the Green’s function expansion&nbsp;is revisited, and the well established truncation criteria, in&nbsp;terms of the relative accuracy of the solutions of the electric&nbsp;field integral equation, is revised from a numerical experiment. Finally, from this numerical procedure an interesting result for the number L of poles is reported.</p> A. J. Zozaya, P. Del Pino ##submission.copyrightStatement## http://www.aemjournal.org/index.php/AEM/article/view/574 Wed, 08 Nov 2017 15:53:18 -0500 Effect of the Base-band Measurement Setup Errors on DPD Performance and Elimination Procedure http://www.aemjournal.org/index.php/AEM/article/view/584 <p class="BodyTextKeep" style="page-break-after: auto;"><span style="font-size: 10.0pt;">In this study, the effect of base-band measurement setup errors on DPD performance was investigated and a calibration procedure is developed to eliminate the measurement errors. A base-band measurement setup is prepared at laboratory with instruments and then the data which is measured and the deteriorating effect of errors on Digital Predistortion (DPD) linearization performance are investigated. In order to eliminate deteriorating effect of this error a three steps calibration procedure is developed. Before and after calibration application DPD performance is measured. It is showed both in simulation and experimentally that the calibration procedure improved the DPD system linearization performance from 10 dB to 26dB and 13dB to 20dB, respectively.</span></p> A. H. Yüzer, E. B. Şanlı ##submission.copyrightStatement## http://www.aemjournal.org/index.php/AEM/article/view/584 Wed, 08 Nov 2017 15:35:16 -0500 Power Spectra of Ionospheric Scintillations http://www.aemjournal.org/index.php/AEM/article/view/652 <p>Second order statistical moments of the phase fluctuationsare obtained taking into account the boundary condition,diffraction effects and polarization coefficients of theordinary and extraordinary waves. The variance and thecorrelation function are calculated for arbitrary 3D spectralfunction of electron density fluctuations containing bothanisotropic Gaussian and power-law spectra; anisotropycoefficient and the orientation angle of elongated plasmairregularities. The phase scintillation index and thescintillation level are analyzed numerically. Maximum ofthe scintillation index for small-scale irregularities is in theinterval 0.2-0.3 corresponding to the moderate scintillationintensity, within the weak-scatter regime. Splashes arerevealed for different anisotropy factor of elongated largescaleirregularities varying orientation angle with respect tothe lines of force of geomagnetic field. Scintillation index iscalculated for small-scale irregularities using the “frozenin”assumption and taking into account movement of rigidirregularities. Log-log plots of the power spectrum of theintensity fluctuations have the same minimums satisfyingthe “standard relationship” of scattered ordinary andextraordinary waves. It was shown that the normalizedscintillation level growth in both non-fully-developeddiffraction pattern and in transition zone increasinganisotropy factor. Rising orientation angle scintillation leveldecreases and splashes arises in fully developedscintillation region.</p> G. Vakhtang Jandieri, A. Ishimaru, B. Rawat, O. Kharshiladze, Z. Diasamidze ##submission.copyrightStatement## http://www.aemjournal.org/index.php/AEM/article/view/652 Wed, 08 Nov 2017 14:05:25 -0500 A Novel Hammer-Shaped UWB Antenna with Triple Notched-Band for Rejecting RLS, WLAN and XSCS bands http://www.aemjournal.org/index.php/AEM/article/view/527 <p>A novel hammer-shaped UWB printed antenna with triple notched stop bands is presented and fabricated on FR-4 substrate with size of 40×40×1.6 mm3. The proposed antenna is composed of hammer-shaped patch with C-shaped slot, U-shaped slot on feed line, and inverted stepped notch and bevel edges with pair of L-shaped slots in partial ground plane. The fabricated antenna is tested and obtained impedance bandwidth 2.89 ̶ 11.6 GHz with three notched stop bands 3.15 ̶ 3.7 GHz, 5.45 ̶ 6.8 GHz, and 7.5 ̶&nbsp; 8.8 GHz, for radiolocation system (RLS), wireless local area networks (WLAN), and X-band satellite communication system (XSCS) bands, respectively. Moreover, the antenna result shows omnidirectional radiation pattern, average gain of 3.10 dBi over the whole UWB band except at the notched frequency bands.</p> H. S. Mewara, D. Jhanwar, M. M. Sharma, J. K. Deegwal ##submission.copyrightStatement## http://www.aemjournal.org/index.php/AEM/article/view/527 Sun, 22 Oct 2017 07:08:38 -0400 MEMS based monolithic Phased array using 3-bit Switched-line Phase Shifter http://www.aemjournal.org/index.php/AEM/article/view/520 <p>This article details the design of an electronically scanning phased array antenna with proposed fabrication process steps. Structure is based upon RF micro-electromechanical system (MEMS) technology. Capacitive type shunt switches have been implemented here to cater high frequency operation. The architecture, which is deigned at 30 GHz, consists of 3-bit (11.25º, 22.5º and 45º) integrated Switched-line phase shifter and a linearly polarized microstrip patch antenna. Detailed design tricks of the Ka-band phase shifter is outlined here. The whole design is targeted for future monolithic integration. So, the substrate of choice is High Resistive Silicon (ρ &gt; 8kΩ-cm, tan δ =0.01 and ϵr =11.8). The overall circuit occupies an cross-sectional area of 20 × 5 mm2. The simulated results show that the phase shifter can provide nearly 11.25º/22.5º/45º phase shifts and their combinations at the expense of 1dB average insertion loss at 30 GHz for eight combinations. Practical fabrication process flow using surface micromachining is proposed here. Critical dimensions of the phased array structure is governed by the deign rules of the standard CMOS/MEMS foundry.</p> A. Karmakr, B. Roy, A. K. Bhattacharjee ##submission.copyrightStatement## http://www.aemjournal.org/index.php/AEM/article/view/520 Sun, 22 Oct 2017 06:40:34 -0400 Fractal Shaped Antenna based tri-band Energy Harvester http://www.aemjournal.org/index.php/AEM/article/view/518 <p>Energy can be conserved by reusing what has already been spent. Such type of energy is readily available in the electromagnetic form (ambient RF energy). Signals broadcasted from AM, FM, cellular base stations and millions of other wireless devices can be converted to DC power. However, the main roadblock in this field of research is the level of power that ambient radiation carries. High efficiency antennas and rectifier circuits are required to harvest a fair amount of energy that can be used by low power devices. This paper presents the design of a novel multiband fractal antenna and a rectifier circuit that can be used to harvest ambient RF energy.</p> S. Datta, K. Kar, M. Pal, R. Ghatak ##submission.copyrightStatement## http://www.aemjournal.org/index.php/AEM/article/view/518 Sun, 22 Oct 2017 06:27:32 -0400 Triple-Notched Band CPW fed UWB Antenna with Metallic Reflector for High Gain Performance http://www.aemjournal.org/index.php/AEM/article/view/506 <p class="BodyTextKeep">This paper exhibits the design and performance of a coplanar waveguide (CPW) fed triple notched band ultra-wide band (UWB) antenna. Proposed prototype has two U-shaped slots on the patch and an inverted U slot in feed line with a metal reflector beneath the radiating element. Proposed structure renders wider impedance bandwidth extended between frequencies 2.71GHz to 12.92 GHz for VSWR &lt; 2 with three rejection bands in the frequency ranges 3.456 to 3.988 GHz (WI-MAX IEEE 802.16), 5.27 to 6.032 GHz (WLAN IEEE 802.11 a/h/j/n) and 7.88 to 8.65 GHz (X-band down link satellite system) for VSWR &gt; 2. The utmost simulated gain of proposed antenna with reflector is close to 9.9dBi at 7.4GHz. A sharp reduction observed in the efficiency values of the proposed structure at stop bands. Perhaps, this structure proved as a useful tool for various applications in modern communication systems including UWB.</p> K. G. Jangid, P. K. Jain, B. R. Sharma, V. K. Saxena, V. S. Kulhar, D. Bhatnagar ##submission.copyrightStatement## http://www.aemjournal.org/index.php/AEM/article/view/506 Sun, 22 Oct 2017 05:53:21 -0400