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This paper presents a multipole expansion for the layered media Green's function (GF). It is obtained thanks to a closed-form expression of the GF as a finite sum of Hankel functions. This multipole expansion can be introduced in the framework of Mixed-Potential Integral Equation (MPIE) formulations and solved with the Method-of-Moments (MoM). Then, when applying the Macro Basis Function (MBF) technique,...
A fast and accurate forward scattering algorithm is described for near-field microwave imaging and sensing problems, such as, dielectric parameter estimation, inverse scattering, microwave imaging etc. This algorithm incorporates a variation on the Method of Moments (MOM) simulation technique with antenna calibration measurements. The result is a forward scattering algorithm which accurately caters...
In this paper a fast iterative technique is presented for the analysis of large reflectors through the combination of the Method of Moments (MoM) with Physical Optics (PO). The iteration is based on a Krylov approach imposing orthogonality on each step, together with the use of Macro Basis Functions (MBF) on the feed region. The complexity of the problem is reduced by a Nf /P factor with Nf the number...
The method proposed by the authors to reduce the computational cost devoted to solve the full EM problem in such arrays is based in the macro basis function technique and the interpolation method. On the other hand, it is shown how the embedded element pattern convergence within a radius of influence allows us to account only for a few tens of significative elements when computing the aforementioned...
Periodic structures and periodic antenna arrays have been widely studied and many techniques have been developed for their efficient analysis. Nevertheless, when it comes to aperiodic or non-uniform structures, most of these techniques can not be applied or they require longer computation times. In this work, the suitability of the Macro Basis Functions (MBFs) Technique for aperiodic arrays is shown...
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