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Maurizio Bozzi - One of the best experts on this subject based on the ideXlab platform.

  • Evaluation of the Dispersion Diagram of Inhomogeneous Waveguides by the Variational Meshless Method
    IEEE Transactions on Microwave Theory and Techniques, 2019
    Co-Authors: Vincenzo Lombardi, Maurizio Bozzi, Luca Perregrini
    Abstract:

    This paper presents an extension of the variational meshless method to the calculation of the Dispersion Diagram of metallic waveguides including inhomogeneous dielectric regions. The method is based on the combination of the variational formulation of a 2-D boundary problem and of the meshless method using radial basis functions. The problem requires a vector representation of the field, and it leads to a well-conditioned, real, and symmetric eigenproblem, where the matrices depend on the propagation constant $\beta $ . By solving the eigenproblem for several values of $\beta $ , a spurious-free Dispersion Diagram of the guiding structure is obtained. Several structures are studied to demonstrate the accuracy and reliability of the proposed technique. The simulation results are compared with the analytical ones, when available, and with those given by a commercial FEM code, always showing a very good agreement with a smaller number of unknowns.

  • Practical Design of a Band-Pass Filter using EBG SIW Technology
    2018 48th European Microwave Conference (EuMC), 2018
    Co-Authors: David Lopez, Angela Coves, Enrique Bronchalo, Germán Torregrosa, Maurizio Bozzi
    Abstract:

    Periodic structures have proved to be useful for the practical design of waveguide filters. Starting from the Dispersion Diagram of a unit cell, it is possible to generate a finite structure with very similar pass- and stop-bands (gaps). In this work, the design of a band-pass filter, based on an Electromagnetic Band-Gap (EBG) waveguide in SIW technology periodically perforated with rectangular holes, is successfully addressed. The effect of the dimensions of the rectangular perforations in the different characteristics of the filter (lower cutoff frequency, and center frequency and bandwidth of the rejection-band) is analized through the Dispersion Diagram of the infinitely periodic structure with different unit cells. Additionally, the number of periodic cells in the finite implementation of the filter is shown to be directly related to the depth of the rejection band, and also to the number of poles of the filter.

  • Analysis of NRD components via the order-reduced volume-integral-equation method combined with the tracking of the matrix eigenvalues
    IEEE Transactions on Microwave Theory and Techniques, 2006
    Co-Authors: Maurizio Bozzi, S Germani, Luca Perregrini
    Abstract:

    This paper presents a novel technique for the calculation of the proper modes of two- and three-dimensional nonradiating dielectric (NRD) components for millimeter-wave applications. The electromagnetic analysis is performed by the order-reduced volume-integral-equation method, which leads to a homogeneous matrix problem. The calculation of the Dispersion Diagram of NRD components and of the resonance frequencies of NRD resonators require the determination of the frequencies that correspond to nontrivial solutions of the matrix problem. Those frequencies are determined by the eigenvalue tracking (ET) method, which permits to follow the path of the matrix eigenvalues in the complex plane when varying the frequency. Compared to standard approaches (based on the direct search of the determinant zeros or on the singular value decomposition), the ET method requires a much smaller number of frequency points and, therefore, a much smaller number of electromagnetic analyses. The effectiveness of the proposed approach is demonstrated through the determination of the Dispersion Diagram of an NRD guide and the calculation of the resonance frequencies of an L-shaped resonator. The comparison with experimental data is also reported in the case of a rectangular NRD resonator

  • Solution of homogeneous electromagnetic problems via the tracking of the matrix eigenvalues: application to the analysis of NRD components
    IEEE MTT-S International Microwave Symposium Digest 2005., 2005
    Co-Authors: Maurizio Bozzi, S Germani, Luca Perregrini
    Abstract:

    This paper presents a novel technique for the calculation of the proper modes of 2D or 3D non-radiating dielectric (NRD) components for mm-wave applications. The novelty of this technique is the use of an integral equation method, in conjunction with a special algorithm for solving the resulting homogeneous matrix problem. This algorithm consists in the tracking of the matrix eigenvalues in the complex plane, when varying either the frequency or the mode propagation constant, and proved to be faster and more reliable than standard approaches, based on the direct search of the determinant zeros. Its effectiveness is demonstrated through the determination of the Dispersion Diagram of an NRD guide and the calculation of the resonance frequencies of a dielectric resonator.

  • efficient calculation of the Dispersion Diagram of planar electromagnetic band gap structures by the mom bi rme method
    IEEE Transactions on Antennas and Propagation, 2005
    Co-Authors: Maurizio Bozzi, Luca Perregrini, S Germani, L Minelli, P De Maagt
    Abstract:

    The characterization of planar electromagnetic band-gap structures requires the calculation of the Dispersion Diagram of the modes supported by the periodic structure and the phase of the reflection coefficient under plane-wave illumination. We present a novel method for the calculation of the Dispersion Diagram. The electromagnetic analysis is based on the method of moments/boundary integral-resonant mode expansion (MoM/BI-RME) method and leads to the formulation of a homogeneous matrix problem. The solution of this problem is performed by an iterative procedure: for a given value of the propagation phase constant, the frequency range is scanned to find the frequencies where the field equation has a nontrivial solution. The search of these frequencies is based on the tracking of the eigenvalues in the complex plane, and proved more efficient than other classical methods (direct search of the determinant zeros, singular value decomposition). The reflection coefficient can be readily determined by using the MoM/BI-RME method, already developed for the analysis of the scattering from frequency selective surfaces. The method is applied to the characterization of the classical uniplanar compact photonic-bandgap structure, and analysis results show the accuracy of the method, its efficiency, and its convergence properties.

Luca Perregrini - One of the best experts on this subject based on the ideXlab platform.

  • Evaluation of the Dispersion Diagram of Inhomogeneous Waveguides by the Variational Meshless Method
    IEEE Transactions on Microwave Theory and Techniques, 2019
    Co-Authors: Vincenzo Lombardi, Maurizio Bozzi, Luca Perregrini
    Abstract:

    This paper presents an extension of the variational meshless method to the calculation of the Dispersion Diagram of metallic waveguides including inhomogeneous dielectric regions. The method is based on the combination of the variational formulation of a 2-D boundary problem and of the meshless method using radial basis functions. The problem requires a vector representation of the field, and it leads to a well-conditioned, real, and symmetric eigenproblem, where the matrices depend on the propagation constant $\beta $ . By solving the eigenproblem for several values of $\beta $ , a spurious-free Dispersion Diagram of the guiding structure is obtained. Several structures are studied to demonstrate the accuracy and reliability of the proposed technique. The simulation results are compared with the analytical ones, when available, and with those given by a commercial FEM code, always showing a very good agreement with a smaller number of unknowns.

  • Analysis of NRD components via the order-reduced volume-integral-equation method combined with the tracking of the matrix eigenvalues
    IEEE Transactions on Microwave Theory and Techniques, 2006
    Co-Authors: Maurizio Bozzi, S Germani, Luca Perregrini
    Abstract:

    This paper presents a novel technique for the calculation of the proper modes of two- and three-dimensional nonradiating dielectric (NRD) components for millimeter-wave applications. The electromagnetic analysis is performed by the order-reduced volume-integral-equation method, which leads to a homogeneous matrix problem. The calculation of the Dispersion Diagram of NRD components and of the resonance frequencies of NRD resonators require the determination of the frequencies that correspond to nontrivial solutions of the matrix problem. Those frequencies are determined by the eigenvalue tracking (ET) method, which permits to follow the path of the matrix eigenvalues in the complex plane when varying the frequency. Compared to standard approaches (based on the direct search of the determinant zeros or on the singular value decomposition), the ET method requires a much smaller number of frequency points and, therefore, a much smaller number of electromagnetic analyses. The effectiveness of the proposed approach is demonstrated through the determination of the Dispersion Diagram of an NRD guide and the calculation of the resonance frequencies of an L-shaped resonator. The comparison with experimental data is also reported in the case of a rectangular NRD resonator

  • Solution of homogeneous electromagnetic problems via the tracking of the matrix eigenvalues: application to the analysis of NRD components
    IEEE MTT-S International Microwave Symposium Digest 2005., 2005
    Co-Authors: Maurizio Bozzi, S Germani, Luca Perregrini
    Abstract:

    This paper presents a novel technique for the calculation of the proper modes of 2D or 3D non-radiating dielectric (NRD) components for mm-wave applications. The novelty of this technique is the use of an integral equation method, in conjunction with a special algorithm for solving the resulting homogeneous matrix problem. This algorithm consists in the tracking of the matrix eigenvalues in the complex plane, when varying either the frequency or the mode propagation constant, and proved to be faster and more reliable than standard approaches, based on the direct search of the determinant zeros. Its effectiveness is demonstrated through the determination of the Dispersion Diagram of an NRD guide and the calculation of the resonance frequencies of a dielectric resonator.

  • efficient calculation of the Dispersion Diagram of planar electromagnetic band gap structures by the mom bi rme method
    IEEE Transactions on Antennas and Propagation, 2005
    Co-Authors: Maurizio Bozzi, Luca Perregrini, S Germani, L Minelli, P De Maagt
    Abstract:

    The characterization of planar electromagnetic band-gap structures requires the calculation of the Dispersion Diagram of the modes supported by the periodic structure and the phase of the reflection coefficient under plane-wave illumination. We present a novel method for the calculation of the Dispersion Diagram. The electromagnetic analysis is based on the method of moments/boundary integral-resonant mode expansion (MoM/BI-RME) method and leads to the formulation of a homogeneous matrix problem. The solution of this problem is performed by an iterative procedure: for a given value of the propagation phase constant, the frequency range is scanned to find the frequencies where the field equation has a nontrivial solution. The search of these frequencies is based on the tracking of the eigenvalues in the complex plane, and proved more efficient than other classical methods (direct search of the determinant zeros, singular value decomposition). The reflection coefficient can be readily determined by using the MoM/BI-RME method, already developed for the analysis of the scattering from frequency selective surfaces. The method is applied to the characterization of the classical uniplanar compact photonic-bandgap structure, and analysis results show the accuracy of the method, its efficiency, and its convergence properties.

  • Efficient calculation of the Dispersion Diagram of planar electromagnetic band-gap structures by the MoM/BI-RME method
    IEEE Transactions on Antennas and Propagation, 2005
    Co-Authors: Maurizio Bozzi, Luca Perregrini, S Germani, L Minelli, P De Maagt
    Abstract:

    The characterization of planar electromagnetic band-gap structures requires the calculation of the Dispersion Diagram of the modes supported by the periodic structure and the phase of the reflection coefficient under plane-wave illumination. We present a novel method for the calculation of the Dispersion Diagram. The electromagnetic analysis is based on the method of moments/boundary integral-resonant mode expansion (MoM/BI-RME) method and leads to the formulation of a homogeneous matrix problem. The solution of this problem is performed by an iterative procedure: for a given value of the propagation phase constant, the frequency range is scanned to find the frequencies where the field equation has a nontrivial solution. The search of these frequencies is based on the tracking of the eigenvalues in the complex plane, and proved more efficient than other classical methods (direct search of the determinant zeros, singular value decomposition). The reflection coefficient can be readily determined by using the MoM/BI-RME method, already developed for the analysis of the scattering from frequency selective surfaces. The method is applied to the characterization of the classical uniplanar compact photonic-bandgap structure, and analysis results show the accuracy of the method, its efficiency, and its convergence properties.

P De Maagt - One of the best experts on this subject based on the ideXlab platform.

  • efficient calculation of the Dispersion Diagram of planar electromagnetic band gap structures by the mom bi rme method
    IEEE Transactions on Antennas and Propagation, 2005
    Co-Authors: Maurizio Bozzi, Luca Perregrini, S Germani, L Minelli, P De Maagt
    Abstract:

    The characterization of planar electromagnetic band-gap structures requires the calculation of the Dispersion Diagram of the modes supported by the periodic structure and the phase of the reflection coefficient under plane-wave illumination. We present a novel method for the calculation of the Dispersion Diagram. The electromagnetic analysis is based on the method of moments/boundary integral-resonant mode expansion (MoM/BI-RME) method and leads to the formulation of a homogeneous matrix problem. The solution of this problem is performed by an iterative procedure: for a given value of the propagation phase constant, the frequency range is scanned to find the frequencies where the field equation has a nontrivial solution. The search of these frequencies is based on the tracking of the eigenvalues in the complex plane, and proved more efficient than other classical methods (direct search of the determinant zeros, singular value decomposition). The reflection coefficient can be readily determined by using the MoM/BI-RME method, already developed for the analysis of the scattering from frequency selective surfaces. The method is applied to the characterization of the classical uniplanar compact photonic-bandgap structure, and analysis results show the accuracy of the method, its efficiency, and its convergence properties.

  • Efficient calculation of the Dispersion Diagram of planar electromagnetic band-gap structures by the MoM/BI-RME method
    IEEE Transactions on Antennas and Propagation, 2005
    Co-Authors: Maurizio Bozzi, Luca Perregrini, S Germani, L Minelli, P De Maagt
    Abstract:

    The characterization of planar electromagnetic band-gap structures requires the calculation of the Dispersion Diagram of the modes supported by the periodic structure and the phase of the reflection coefficient under plane-wave illumination. We present a novel method for the calculation of the Dispersion Diagram. The electromagnetic analysis is based on the method of moments/boundary integral-resonant mode expansion (MoM/BI-RME) method and leads to the formulation of a homogeneous matrix problem. The solution of this problem is performed by an iterative procedure: for a given value of the propagation phase constant, the frequency range is scanned to find the frequencies where the field equation has a nontrivial solution. The search of these frequencies is based on the tracking of the eigenvalues in the complex plane, and proved more efficient than other classical methods (direct search of the determinant zeros, singular value decomposition). The reflection coefficient can be readily determined by using the MoM/BI-RME method, already developed for the analysis of the scattering from frequency selective surfaces. The method is applied to the characterization of the classical uniplanar compact photonic-bandgap structure, and analysis results show the accuracy of the method, its efficiency, and its convergence properties.

  • Full-wave characterization of planar EBG structures by the MoM/BI-RME method
    IEEE Antennas and Propagation Society Symposium 2004., 2004
    Co-Authors: Maurizio Bozzi, Luca Perregrini, S Germani, L Minelli, P De Maagt
    Abstract:

    The paper presents a novel method for the the calculation of the Dispersion Diagram and the phase of the reflection coefficient of planar electromagnetic band-gap (EBG) structures. The MoM/BI-RME (boundary integral-resonant mode expansion) method is adopted in conjunction with a new technique for the efficient calculation of the Dispersion Diagram. This technique is based on the tracking of the eigenvalue in the complex plane, and proves more reliable than the search of the determinant zeros. The analysis of the classical uniplanar compact EBG structure is presented.

  • On the solution of eigenvalue problems deriving from the MoM analysis of EBG structures
    2004
    Co-Authors: Maurizio Bozzi, Luca Perregrini, S Germani, L Minelli, P De Maagt
    Abstract:

    This paper describes an efficient method for calculating the Dispersion Diagram of planar electromagnetic band-gap (EBG) structures. When using an integral equation approach, the calculation of the Dispersion Diagram is based on an iterative procedure (with a double loop in frequency and propagation constant), which involves a full-wave analysis and the solution of an eigenvalue problem. In our approach, the full-wave analysis is performed by using the MoM/BI-RME method, which is based on the formulation of an integral equation and its solution by the Method of Moments (MOM) with entire-domain basis functions. For a given value of propagation constant and frequency, this full-wave analysis leads to a matrix eigenvalue problem, and the frequencies where the eigenvalue problem presents non-trivial solutions determine the points of the Dispersion Diagram. The search of the such frequencies is tipically based on the search of the zeros of the determinant of the MOM matrix. In this paper, we propose a different method, based on the tracking of the eigenvalues of the MOM matrix in the complex plane when varying the frequency. This approach proved more reliable than the classical method based on the direct search of the determinant zeros. The method is applied to the analysis of the classical uniplanar compact photonic-bandgap structure, and some results show the accuracy and the efficiency of the method. A comparison between the method based on the tracking of the eigenvalues and the one based on the search of the determinant zeros permits to highlight the advantage of the proposed approach.

  • Analysis of uniplanar electromagnetic band-gap (EBG) structures by the MoM/BI-RME method
    2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535), 1
    Co-Authors: Maurizio Bozzi, Luca Perregrini, S Germani, L Minelli, P De Maagt
    Abstract:

    This paper presents a novel method for the characterization of uniplanar electromagnetic band-gap structures. Their characterization requires the calculation of the Dispersion Diagram of the guided modes and the phase of the reflection coefficient under plane-wave illumination. The reflection coefficient is determined by using the MoM/BI-RME method. The same method is adopted in conjunction with a new technique for the efficient calculation of the Dispersion Diagram. This technique is based on the tracking of the eigenvalue path in the complex plane, and proved more reliable than the method based on the searching of the determinant zeros. The method is applied to the analysis of the classical Uniplanar Compact Electromagnetic Band-Gap structure, and some results show the accuracy of the method, its efficiency, and its convergence properties.

Ladislau Matekovits - One of the best experts on this subject based on the ideXlab platform.

  • Improved Gain Graphene Based Leaky Wave Antenna Loaded by Dielectric Slab in THz Regime
    2019
    Co-Authors: Zahra Hamzavi-zarghani, Ladislau Matekovits, Alireza Yahaghi
    Abstract:

    A sinusoidally modulated graphene microstrip line based leaky wave antenna that operates in the THz regime is presented. The Dispersion Diagram of the unit cell of the antenna is obtained by numerical simulation with commercial software. As a second step, the radiation pattern of the designed leaky wave antenna is calculated: the main beam angle scans with the operating frequency according to the Dispersion Diagram. To increase the gain, the antenna is loaded with a dielectric slab on top of it acting as a partially reflecting surface. By optimizing the height and distance of the slab, increase in the gain is achieved as it is demonstrated by numerical simulations.

  • Band splitting in 2D EBG structure by geometry modulation
    2015 IEEE International Symposium on Antennas and Propagation & USNC URSI National Radio Science Meeting, 2015
    Co-Authors: Ladislau Matekovits, Aldo De Sabata, Ovidiu Lipan
    Abstract:

    The Dispersion Diagram of a 2D periodic structure built in stripline technology is determined by full-wave simulation. One of the geometrical parameter of the structure is then binary modulated in two orthogonal directions, yielding a new periodic structure with a unit cell that is four times larger with respect to the original one. The calculated Dispersion Diagram of the latter structure exhibits the phenomenon of band splitting determined by modulation. The newly introduced modes and enriched band contents have potential applications to antenna technology, filtering and Dispersion engineering.

  • on scaling properties of the Dispersion Diagram of a multi scale printed surface embedded in a parallel plate waveguide
    Symposium on Applied Computational Intelligence and Informatics, 2012
    Co-Authors: A De Sabata, Ladislau Matekovits
    Abstract:

    A device consisting of a patterned surface composed of metal patches embedded in a parallel plate waveguide and relying on strip-line technology is considered. The unit cell of the patterned surface contains a metal patch with a multi-scale shape and a large number of vias connecting the patch to the ground plane. The large number of reactive elements obtained in this way introduces an equally large number of resonances and consequently a Dispersion Diagram with several electromagnetic band-gaps is obtained. The device may be applied to multi-band filtering, antenna feeders and parallel-plate noise mitigation. The problem of the scalability of the device is addressed.

  • SACI - On scaling properties of the Dispersion Diagram of a multi-scale printed surface embedded in a parallel-plate waveguide
    2012 7th IEEE International Symposium on Applied Computational Intelligence and Informatics (SACI), 2012
    Co-Authors: A De Sabata, Ladislau Matekovits
    Abstract:

    A device consisting of a patterned surface composed of metal patches embedded in a parallel plate waveguide and relying on strip-line technology is considered. The unit cell of the patterned surface contains a metal patch with a multi-scale shape and a large number of vias connecting the patch to the ground plane. The large number of reactive elements obtained in this way introduces an equally large number of resonances and consequently a Dispersion Diagram with several electromagnetic band-gaps is obtained. The device may be applied to multi-band filtering, antenna feeders and parallel-plate noise mitigation. The problem of the scalability of the device is addressed.

  • Influence of magnetic permeability on Dispersion Diagrams of a parallel-plate waveguide built with metamaterials
    2011
    Co-Authors: Ladislau Matekovits, Aldo De Sabata, Ildiko Peter
    Abstract:

    A homogeneous dielectric filled parallel-plate waveguide (PPW) with one metallic wall replaced by a metamaterial is considered. The Dispersion Diagram (DD) featuring the band structure, calculated by electromagnetic simulation, is used to investigate on the effects of the replacement of one of the dielectric materials entering into the composition of the PPW by one presenting magnetic properties. The reported results relative to the variation of the DD versus the magnetic permeability indicates a strong frequency variation of the position of the first band-gap and of the band-gaps widths. The large dynamic allows efficient application of Dispersion engineering targeting advanced applications.

S Germani - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of NRD components via the order-reduced volume-integral-equation method combined with the tracking of the matrix eigenvalues
    IEEE Transactions on Microwave Theory and Techniques, 2006
    Co-Authors: Maurizio Bozzi, S Germani, Luca Perregrini
    Abstract:

    This paper presents a novel technique for the calculation of the proper modes of two- and three-dimensional nonradiating dielectric (NRD) components for millimeter-wave applications. The electromagnetic analysis is performed by the order-reduced volume-integral-equation method, which leads to a homogeneous matrix problem. The calculation of the Dispersion Diagram of NRD components and of the resonance frequencies of NRD resonators require the determination of the frequencies that correspond to nontrivial solutions of the matrix problem. Those frequencies are determined by the eigenvalue tracking (ET) method, which permits to follow the path of the matrix eigenvalues in the complex plane when varying the frequency. Compared to standard approaches (based on the direct search of the determinant zeros or on the singular value decomposition), the ET method requires a much smaller number of frequency points and, therefore, a much smaller number of electromagnetic analyses. The effectiveness of the proposed approach is demonstrated through the determination of the Dispersion Diagram of an NRD guide and the calculation of the resonance frequencies of an L-shaped resonator. The comparison with experimental data is also reported in the case of a rectangular NRD resonator

  • Solution of homogeneous electromagnetic problems via the tracking of the matrix eigenvalues: application to the analysis of NRD components
    IEEE MTT-S International Microwave Symposium Digest 2005., 2005
    Co-Authors: Maurizio Bozzi, S Germani, Luca Perregrini
    Abstract:

    This paper presents a novel technique for the calculation of the proper modes of 2D or 3D non-radiating dielectric (NRD) components for mm-wave applications. The novelty of this technique is the use of an integral equation method, in conjunction with a special algorithm for solving the resulting homogeneous matrix problem. This algorithm consists in the tracking of the matrix eigenvalues in the complex plane, when varying either the frequency or the mode propagation constant, and proved to be faster and more reliable than standard approaches, based on the direct search of the determinant zeros. Its effectiveness is demonstrated through the determination of the Dispersion Diagram of an NRD guide and the calculation of the resonance frequencies of a dielectric resonator.

  • efficient calculation of the Dispersion Diagram of planar electromagnetic band gap structures by the mom bi rme method
    IEEE Transactions on Antennas and Propagation, 2005
    Co-Authors: Maurizio Bozzi, Luca Perregrini, S Germani, L Minelli, P De Maagt
    Abstract:

    The characterization of planar electromagnetic band-gap structures requires the calculation of the Dispersion Diagram of the modes supported by the periodic structure and the phase of the reflection coefficient under plane-wave illumination. We present a novel method for the calculation of the Dispersion Diagram. The electromagnetic analysis is based on the method of moments/boundary integral-resonant mode expansion (MoM/BI-RME) method and leads to the formulation of a homogeneous matrix problem. The solution of this problem is performed by an iterative procedure: for a given value of the propagation phase constant, the frequency range is scanned to find the frequencies where the field equation has a nontrivial solution. The search of these frequencies is based on the tracking of the eigenvalues in the complex plane, and proved more efficient than other classical methods (direct search of the determinant zeros, singular value decomposition). The reflection coefficient can be readily determined by using the MoM/BI-RME method, already developed for the analysis of the scattering from frequency selective surfaces. The method is applied to the characterization of the classical uniplanar compact photonic-bandgap structure, and analysis results show the accuracy of the method, its efficiency, and its convergence properties.

  • Efficient calculation of the Dispersion Diagram of planar electromagnetic band-gap structures by the MoM/BI-RME method
    IEEE Transactions on Antennas and Propagation, 2005
    Co-Authors: Maurizio Bozzi, Luca Perregrini, S Germani, L Minelli, P De Maagt
    Abstract:

    The characterization of planar electromagnetic band-gap structures requires the calculation of the Dispersion Diagram of the modes supported by the periodic structure and the phase of the reflection coefficient under plane-wave illumination. We present a novel method for the calculation of the Dispersion Diagram. The electromagnetic analysis is based on the method of moments/boundary integral-resonant mode expansion (MoM/BI-RME) method and leads to the formulation of a homogeneous matrix problem. The solution of this problem is performed by an iterative procedure: for a given value of the propagation phase constant, the frequency range is scanned to find the frequencies where the field equation has a nontrivial solution. The search of these frequencies is based on the tracking of the eigenvalues in the complex plane, and proved more efficient than other classical methods (direct search of the determinant zeros, singular value decomposition). The reflection coefficient can be readily determined by using the MoM/BI-RME method, already developed for the analysis of the scattering from frequency selective surfaces. The method is applied to the characterization of the classical uniplanar compact photonic-bandgap structure, and analysis results show the accuracy of the method, its efficiency, and its convergence properties.

  • Full-wave characterization of planar EBG structures by the MoM/BI-RME method
    IEEE Antennas and Propagation Society Symposium 2004., 2004
    Co-Authors: Maurizio Bozzi, Luca Perregrini, S Germani, L Minelli, P De Maagt
    Abstract:

    The paper presents a novel method for the the calculation of the Dispersion Diagram and the phase of the reflection coefficient of planar electromagnetic band-gap (EBG) structures. The MoM/BI-RME (boundary integral-resonant mode expansion) method is adopted in conjunction with a new technique for the efficient calculation of the Dispersion Diagram. This technique is based on the tracking of the eigenvalue in the complex plane, and proves more reliable than the search of the determinant zeros. The analysis of the classical uniplanar compact EBG structure is presented.