A Comprehensive Forward Model for Imaging under Irregular Terrain Using RF Tomography

Imaging of tunnel networks under irregular terrain using RF tomography is generalized to include the possibility of magnetic dipoles (i.e., electric loops) either as transmitting or receiving devices. Forward scattering models are presented, and a generalized method for computing numerical dyadic Green’s functions is detailed. Explicit formulas for fast numerical implementation are also presented. The paper is corroborated with numerical simulations aimed at validating formulas

Wireless communications in an urban environment.

Wireless communications in an urban environment

Acceleration of the Convergence of Series Containing Mathieu Functions Using Shanks Transformation

A modification of the standard application of Shanks transformation is shown to improve the convergence rate in certain cases where the straightforward application of Shanks transformation fails. Here, the straightforward application of Shanks transformation to a well known series expansion containing Mathieu functions failed to improve the convergence rate. However, convergence was achieved by a new method of applying Shanks transformation. This new method requires analysis of the behavior of the series terms to determine the cause of the slow or failing convergence. Then Shanks transformation was applied only to the slowly convergent part of the series. This work is important because with this new method convergence may be achieved in cases where the standard application of Shanks transformation fails to improve the converge rate

Isorefractivity: teaching and research perspectives

The isorefractive condition augments the set ofgeometries for which electromagnetic boundary value problems are solvable with the mode matching method. From a teaching viewpoint, understanding the isorefractive condition enables to appreciate the underpinnings of the special functions used in certain coordinate systems. From a research viewpoint, the isorefractive condition extends the set of problems for which an exact solution is known, thus leading to new canonical problems that can be used as challenging benchmarks to validate numerical approaches

Experimental Validation of Second-Order Diffraction Coefficients for Computation of Path-Loss Past Buildings

Electromagnetic fields diffracted past buildings are not correctly predicted by ray-tracing methods using first-order diffraction coefficients. Correct results are obtained by using second-order diffraction coefficients as demonstrated by the experimental validation provided and discussed herein

Editorial Outstanding Associate Editors and Top Reviewers

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2018: A Milestone Year in Review

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New Visual Tool for Distinguished Lecturers Talks [Distinguished Lecturers]

Danilo Erricolo states that they have developed a new visual tool for the IEEE Antennas and Propagation Society (AP-S) website to help track the locations of Distinguished Lecturer (DL) talks. The purpose of the tool is to make information easily available about upcoming DL talks so that Chapter chairs can extend invitations when the DLs are traveling nearby. This is particularly useful for DLs who travel significantly far away from their home region and need to give many talks to accumulate sufficient credit to cover their expenses