Characteristic mode analysis of composite metal-dielectric structure, based on surface integral equation/moment method

Maximidis, Ronis; Zekios, Constantinos L.; Kaifas, Theodorοs N.; Vafiadis, E.; Kyriacou, George A.

doi:10.1109/eucap.2014.6902414

Cited by 25 publications

(14 citation statements)

References 4 publications

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“…The eigenvalue solution set for the impedance matrix in (11) solves for the structure's internal resonances which now occur at real frequencies. In theory these internal resonant modes can be easily removed as the associated surface currents are non-radiating and as such the modes cannot be normalized using the method described by (16) in [2]. However, in practice the structures domain is built using approximate expansion functions, e.g.…”

Section: Combined Equation 1: Ai Ecie + Bi Efiementioning

confidence: 99%

“…However, in theory it is possible to exploit a VIE method to provide the external CMs of any object. These modes can then be used to prove that non-real CMs are associated with a direct SIE decomposition of both (3) and (11), and applying (16) to (11) solves for non-real CMs. Although this does not prove if a TCM method will always solve for non-real CMs, it does show if a TCM method solves for any non-real CM at a defined frequency for a defined structure.…”

Section: CM Solution To a Mom Vie Formulationmentioning

confidence: 99%

“…The proof given in [15] was first used in [16] to extract the impedance matrix of a PEC object in close proximity to a dielectric object. This work did not analyze, compute, or utilize the modes within the dielectrics, but only studied the CMs of the PEC object.…”

Section: Introductionmentioning

confidence: 99%

“…Qrad was defined in [29] and [30], and can be found using the symmetric PMCHWT characteristic currents [31] [32]. Using (16) and the associated quality factors in (18), it is possible to determine if a mode is related to an internal or external resonance. The modes which do not adhere to (16) are modes associated with internal resonances whereas all other modes are external resonances.…”

mentioning

confidence: 99%

“…Using (16) and the associated quality factors in (18), it is possible to determine if a mode is related to an internal or external resonance. The modes which do not adhere to (16) are modes associated with internal resonances whereas all other modes are external resonances. This method, henceforth called physical bounds method, can be applied to the CMs computed using (12) and the symmetric SIE MoM impedance matrix (11).…”

mentioning

confidence: 99%

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Computational Analysis and Verifications of Characteristic Modes in Real Materials

Miers

Lau

2016

IEEE Trans. Antennas Propagat.

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Despite its long history, the Theory of Characteristic Modes has only been utilized in antenna design for perfect electric conductors. This is due to computational problems associated with dielectrics and magnetic materials. In particular, the symmetric form of the PMCHWT surface formulation for the Method of Moments (MoM) solves for both external (real) and internal (non-real) resonances of a structure. The external resonances are the characteristic modes, whereas the internal resonances are not. This article proposes a new post-processing method capable of providing unique and real characteristic modes in all physical mediums, including lossy magnetic and dielectric materials. The method removes the internal resonances of a structure by defining a minimum radiated power, which is found through utilizing the physical bounds of the structure. The characteristic modes found using the proposed method are verified through the use of a MoM volume formulation, time domain antenna simulations, and experiments involving multiple antenna prototypes.

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Section: Combined Equation 1: Ai Ecie + Bi Efiementioning

confidence: 99%

Section: CM Solution To a Mom Vie Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Computational Analysis and Verifications of Characteristic Modes in Real Materials

Miers

Lau

2016

IEEE Trans. Antennas Propagat.

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Antenna Characteristic Mode Analysis and Applications

Guan

Chen

2022

Wiley Encyclopedia of Electrical and Electronics Engineering

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In the field of electromagnetism, the characteristic mode (CM) method has been applied to theoretical analysis and engineering design of electromagnetic scattering and radiation due to its clear physical meaning and complete theory. In this article, the CMs are used as the entire‐domain basis functions for solving electromagnetic scattering and radiation problems of large‐scale, arbitrary arrangement of repetitive structures. Firstly, the CM method for solving the scattering problems of nonconnected repetitive structures is reviewed, and the source mode is introduced to compensate the accuracy when analyzing radiation problems. Secondly, for connected repetitive structures, the buffer region is proposed to guarantee the current continuity on the surface of the conductor, and half‐SWG basis functions are used for dielectric connected structures. Thirdly, a series of acceleration methods are proposed to improve the computational efficiency. To generate the reduced matrix fast, the translation invariance of repetitive structures and interpolation technology are utilized to fill the matrix entries. Multilevel Fast Multipole Algorithm (MLFMA) is also used to accelerate the matrix–vector products (MVPs) between the impedance matrix and the eigenvectors. At last, a hybrid MPI–OPENMP parallel scheme is proposed for solving large‐scale finite array. The numerical examples have shown that the proposed method has a good accuracy and efficiency. It provides a strong tool for designing and optimizing antenna arrays and other EM repetitive structures.

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Characteristic Modes

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Characteristic mode analysis of composite metal-dielectric structure, based on surface integral equation/moment method

Cited by 25 publications

References 4 publications

Computational Analysis and Verifications of Characteristic Modes in Real Materials

Computational Analysis and Verifications of Characteristic Modes in Real Materials

Antenna Characteristic Mode Analysis and Applications

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