Journal of Electromagnetic Waves and Applications (J ELECTROMAGNET WAVE )

Publisher: Brill Academic Publishers

Description

This journal covers all aspects of electromagnetic wave theory and its various applications. The journal publishes original papers and review articles on new theories, methodology and computational techniques, and interpretations of both theoretical and experimental results. The aim is to report advancement and progress in the modern development of electromagnetic wave theory and to report new and exciting applications. The journal's scope is broad and includes the following topics: Wave propagation theory, Remote sensing, Inverse scattering, Geophysical subsurface probing, inversion techniques, Propagation in random media, Oceanography-radar reflection, Meteorology, Ionospheric effects on wave propagation, Ionospheric modifications and heating, Atmospherics, Antenna theory and applications, Transients, Radar measurements and applications, Active experiments using space vehicles, Extra-terrestrial remote sensing, Electromagnetic interferometry, Ground-based remote sensing, Agricultural remote sensing, Microelectronic, integrated circuits, EM wave transmission in VLSI, Electromagnetic pulse transmission and coupling, Electromagnetic compatibility, Optical and millimeter wave techniques, Integrated optics, Fiber optics, Communication systems, Solid state devices and circuits, Medical applications, biological effects, Ferrite devices, Field and network theory, High power devices and systems, Submicron structures, Waves in composite and amorphous materials, Expert systems in remote sensing, Numerical methods.

Impact factor 1.40

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    Impact factor
  • 5-year impact
    1.59
  • Cited half-life
    2.50
  • Immediacy index
    0.34
  • Eigenfactor
    0.01
  • Article influence
    0.38
  • Website
    Journal of Electromagnetic Waves and Applications website
  • Other titles
    Journal of electromagnetic waves and applications (Online)
  • ISSN
    0920-5071
  • OCLC
    51038926
  • Material type
    Periodical, Internet resource
  • Document type
    Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Brill Academic Publishers

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Pre-print can only be deposited after acceptance for peer-review
    • Author's Post-print on author's personal website, institutional website or institutional repository
    • Publisher version may be posted on author's personal website only
    • Publisher's version/PDF cannot be used in institutional repository
    • Must link to publisher version
    • Published source must be acknowledged
  • Classification
    ​ green

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: The problem of diffraction by a perfectly conducting cylinder with the cross section being an ellipse with high aspect ratio is examined. The high-frequency asymptotics of the currents induced by a plane electromagnetic wave incident along or at a small angle to the major axis of the ellipse is constructed. The field in the boundary layer near the surface is represented as a sum of the forward and the backward waves, both considered in parabolic equation approximation. Comparison with numerical test shows that the leading order term of the asymptotics provides sufficiently accurate approximation for the induced currents on cylinders of one wavelength size and larger.
    Journal of Electromagnetic Waves and Applications 11/2014; 28(18).
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    ABSTRACT: The paper presents analytical investigation of the propagation of electromagnetic waves through chiral/chiral nihility slab waveguide with the emphasis on slow- and fast-waves in the guide. For this purpose, the eigenvalue equation is deduced, followed by the derivation of slow-wave propagation condition. The electromagnetic response of slow- and fast-waves is studied, taking into account a few low-order even modes. It is observed that higher chirality value strongly supports slow-wave propagation for the right-circularly polarized wave. Further, the impedance matching conditions are employed in order to study the behavior of transverse electromagnetic (TEM) modes in the guide. Conditions very close to mode-degeneracy are observed in the case of TEM mode excitation – the phenomenon which may be useful for optical applications.
    Journal of Electromagnetic Waves and Applications 11/2014; 28(18).
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    ABSTRACT: In this paper, we propose a novel sparse transform dubbed exponential wavelet transform (EWT), which provides sparser coefficients than the conventional wavelet transform. We also propose a reconstruction algorithm EWT–ISTA that takes advantages of both EWT and ISTA. Experiments compare the proposed EWT–ISTA with conventional ISTA method that takes wavelet transform as sparsity domain. We employ five different kinds of MR images, i.e. the phantom, the brain, the leg, the arm, and the uterus images. The results demonstrate that: (1) EWT is more efficient than wavelet transform in terms of sparsity representation, and (2) the proposed EWT–ISTA can obtain less MAE & MSE, and higher PSNR than ISTA, with comparable computation time.
    Journal of Electromagnetic Waves and Applications 11/2014; 28(18).
  • [Show abstract] [Hide abstract]
    ABSTRACT: We propose a compact multiport two-stage combiner capable of handling peak power up to 10 MW at the UHF band and suitable for particle accelerator applications. The detailed electromagnetic and thermal simulations of the combiner operating at the ESS specifications of 400 kW at 352 MHz are presented. At the first stage, the power is combined to a 100 kW level by means of a non-resonant 12-way radial combiner, which is assumed to be fed by 8 kW solid-state amplifiers. At the second stage, a waveguide combiner with T-shape couplers separated by a half-wavelength of the fundamental waveguide mode is used in order to bring the combined power to the required level. The combiner is broadband and has a relative power non-uniformity less than 5% over a 10 MHz frequency band around the central frequency. The size of the proposed combiner is several times smaller than the existing ones. We also present low-power measurement results of a prototype of the radial combiner.
    Journal of Electromagnetic Waves and Applications 11/2014; 28(18).
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    ABSTRACT: The paper discusses the development of a spectral signature-based chipless Radio Frequency Identification tag using multiple spurline resonators to encode data. Bistatic detection approach is used to decode the tag identity using either the amplitude or the phase of the spectral signature in a spurline resonator. The tag comprises two cross-polarized transmitting and receiving wideband monopole antennas connected to the multiple spurline resonators. The prototype of the tag is fabricated on a substrate C-MET/LK4.3 of dielectric constant 4.3 and loss tangent 0.0018. The measured results show that group delay response can also be used to decode the tag’s identity.
    Journal of Electromagnetic Waves and Applications 11/2014; 28(18).
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    ABSTRACT: A novel asymmetric coplanar strip feed (ACS-fed) ultra-wideband (UWB) antenna with sharp selectivity band-notched characteristics is proposed and fabricated in this paper. The high selectivity notched band, ranging from 5.0 GHz to 5.9 GHz, is achieved by coupling the parasitic strip embedded in the ground plane and the slit etched on the radiation patch. The notched band can be easily controlled by adjusting the width or the length of the strip and the slit. Moreover, due to the unique antenna structure, the proposed antenna obtains a Bluetooth band (2.4–2.5 GHz) and two stop bands (3.3–3.8 GHz and 5.0–5.9 GHz). The antenna is printed on a very small (10 mm × 25 mm × 1 mm) substrate. Finally, the proposed compact ACS-fed UWB antenna is successfully simulated, designed and measured, showing good impedance matching, stable gain and near omni-directional radiation patterns.
    Journal of Electromagnetic Waves and Applications 11/2014; 28(18).
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, we present an electromagnetic inverse particle swarm optimization (PSO)-based method for modeling the electromagnetic radiation of components or systems of power electronics using the near-field technique. The implementation of this method has been applied to the cartography of the magnetic field emitted by different structures. To fully appreciate our approach, the obtained results along with the proposed methods were compared to those obtained by the inverse method, based on the genetic algorithm (GA). Basically, we will compare the results at two levels, theoretical and practical. For the theoretical comparison, both methods are applied to several calculated cartographies of the magnetic field, using the analytical equations of the magnetic and electric dipoles. For the practical comparison, we have used results based on the measurements performed on real systems. The purpose of these comparisons is to show that using the PSO in the electromagnetic inverse method is more interesting than the GA. In fact, the obtained results have shown that the PSO-based method is at least six times faster than the GA-based one.
    Journal of Electromagnetic Waves and Applications 11/2014; 28(18).
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper proposes a novel InISAR imaging method for space moving targets on a squint model using two antennas. In the pre-processing for range compression based on wideband direct sampling data, an adaptive matched filter containing speed is designed to carry out high-speed movement compensation that is essential for space targets. In order to reserve the phase history of each antenna, coherent processing for ISAR imaging is adopted. The corresponding size can be achieved by interferometric processing of the two complex ISAR images. Considering the condition may not be strictly satisfied, the influence of 3D motion and squint model is analyzed and a compensation method is adopted. Image distortion is corrected using coordinate transform. Simulation results confirm the effectiveness of the analysis and 3D imaging algorithm.
    Journal of Electromagnetic Waves and Applications 11/2014; 28(17).
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    ABSTRACT: Electromagnetic behavior of twisted clad optical fibers is investigated under the situation of sheath helix of perfect electromagnetic (PEMC) conductor introduced at the core–clad interface. The eigenvalue equation for the structure is deduced by applying suitable boundary conditions, and the dispersion behavior of the fiber is analyzed considering the cases of non-dispersive as well as dispersive core with the sustainment of a few low-order modes. The effect on dispersion properties is observed due to alterations in the pitch angle of helical twists as well as the admittance value of the PEMC material. It has been found that the pitch angle and the admittance values can be properly adjusted to attain the degenerate properties of modes which would find many applications in optics industry.
    Journal of Electromagnetic Waves and Applications 11/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: The ability to shrink the physical dimensions of an antenna without significant performance degradation has been of great interest for over half a century. Over the decades, several antenna miniaturization techniques have been proposed, from structural modifications and lumped component loading, to the use of high permittivity/permeability materials, to the more recent applications of metamaterials. In this paper, we provide an overview of antenna miniaturization and a review of various miniaturization techniques with an emphasis on metamaterials. We choose to restrict the scope of our review primarily to antennas for which prototypes have been built and their properties measured. In particular, we concentrate on those metamaterial techniques categorized into the following groups: composite right/left-handed metamaterials, high impedance surfaces, and metamaterial-inspired techniques. Finally, we provide a summary table that allows the reader to compare the performance trade-offs between various miniaturized antennas.
    Journal of Electromagnetic Waves and Applications 11/2014; 28(17).
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    ABSTRACT: The optical transformation has been found to be an exceptional tool for determining the permittivity and permeability tensors ε and μ that are required to provide desired patterns of electromagnetic energy flow. In a previous application of the optical transformation, a planar metamaterial-coated plate (MMCP) was designed which will scatter waves in the same manner as a three-dimensional parabolic reflector. The required ε and μ, however, were not diagonal. A new method is proposed which can be applied to cylindrically symmetric reflectors of general geometry, and which results in ε and μ tensors which are diagonal. This is accomplished (a) by dividing the original region into two sub-regions and performing the transformation on each one separately, and (b) by performing the transformation along orthogonal surfaces that include the reflector boundaries. The method is applied to conical, parabolic, and spherical reflectors. The MMCP that is equivalent to each of these geometries is numerically validated for wave guide and plane wave radiation sources.
    Journal of Electromagnetic Waves and Applications 11/2014; 28(17).
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    ABSTRACT: Diffracted fields from a resistive half-plane were investigated by the method of physical optics (PO) and the physical theory of diffraction. The coefficient of the PO scattering integral was derived for the first time for the resistive half-plane. Uniform fringe field expressions were obtained in terms of the Fresnel functions. The resultant expressions of the fringe fields were plotted and analyzed numerically.
    Journal of Electromagnetic Waves and Applications 11/2014; 28(17).
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    ABSTRACT: In cloaking, a body is hidden from detection by surrounding it by a coating consisting of an unusual anisotropic nonhomogeneous material. The permittivity and permeability of such a cloak are determined by the coordinate transformation of compressing a hidden body into a point (3D or spherical configuration) or a line (2D or cylindrical configuration). Some components of the electrical parameters of the cloaking material [Inline formula] are required to have infinite or zero value at the boundary of the hidden object. Approximate cloaking can be achieved by transforming the cylindrical bodies (dielectric and conducting) virtually into a small cylinder rather than a line, which eliminates the zero or infinite values of the electrical parameters but produces scattering. The solution is obtained by rigorously solving Maxwell equations using angular harmonics expansion. In this work, the scattering pattern and the back-scattering cross-section against the frequency for cloaked conducting and dielectric cylinders are studied for both transverse magnetic (TMz) and transverse electric (TEz) polarizations of the incident plane wave for different transformed body radii.
    Journal of Electromagnetic Waves and Applications 09/2014; 28(14).
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    ABSTRACT: The characteristic basis function method (CBFM) is an efficient approach to analyze electromagnetic problems through the size reduction of the original matrix in the method of moments equation. However, adequate plane waves (PWs) must be set in each sub-block to construct characteristic basis functions (CBFs), thus increasing the number of CBFs and causing higher time consumption in singular value decomposition. In addition, the reduced matrix calculation procedure is time-consuming because numerous vector–matrix–vector products (VMVPs) are contained. To mitigate these problems, an improved CBFM is presented. This method fully considers the mutual coupling effects among sub-blocks to obtain the secondary level characteristic basis function (SCBF). Therefore, the number of PWs, as well as the number of CBFs, is significantly reduced. The fast dipole method is also used to accelerate the matrix–vector products in the construction of SCBFs and VMVPs in the calculation of the reduced matrix. Numerical results demonstrate that the proposed method is accurate and efficient.
    Journal of Electromagnetic Waves and Applications 09/2014; 28(7).
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    ABSTRACT: In this paper, the analytical solution of metallic spheres which takes the frequency dispersion characteristic into account is studied at terahertz frequencies. In order to characterizing metals at terahertz frequencies, the classical relaxation effect frequency dispersion model is used and a calculated analytical solution of metallic spheres is given with respect to the large permittivity of metallic spheres. The analytical solution supplies an effective tool for the scattering analysis of metallic spheres at terahertz frequencies. The simulation results show that the main scattering signature of a polished aluminum sphere comes from the specular reflection at terahertz frequencies and a polished aluminum sphere should be characterized by migratory scattering center model. These conclusions may provide an important reference for terahertz radar cross section calibration and scattering source diagnosis.
    Journal of Electromagnetic Waves and Applications 09/2014; 28(14).