A Fast Frequency Sweep – Green’s Function Based Analysis of Substrate Integrated Waveguide (original) (raw)
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An efficient iterative method for analysis of a substrate integrated waveguide structures
Microwave and Optical Technology Letters, 2010
The article presents an efficient method for characterization of substrate integrated waveguide structures. Substrate integrated circuits are considered as an ensemble of conducting vias placed in a parallel-plate waveguide. The analysis is based on the wave concept formulation and the iterative resolution of two relationships between incident and reflected volume-waves. The reflection operator is expressed using Hankel functions and computed by considering the scattering from the ensemble of conducting posts. Numerical results have been obtained for substrate integrated waveguide (SIW) structures already presented in literature. Simulations obtained are compared with recent published results. A good agreement is achieved together with significant improvements both in computational time and memory requirements.
Microwave and Optical Technology Letters, 2015
A fast frequency analysis of lossy substrate-integrated waveguides based on the asymptotic waveform evaluation (AWE) and Pade`approximant technique in conjunction with the dyadic Green's function technique, is presented. The derivatives needed to evaluate moments in the AWE method are computed in a simple way thanks to an efficient method that reduces their computational cost. Numerical results demonstrate the efficiency and the accuracy of the proposed approach.
Progress In Electromagnetics Research C, 2012
In this paper, two dimensional multi-port method is used to analyze substrate integrated waveguide by using Green's function approach to obtain the impedance matrix of equivalent planar structure. Modes propagation constant of substrate integrated waveguide, as a periodic structure, is calculated by applying Floquet's theorem on the impedance matrix of a unit cell. Field distribution of the propagating mode is obtained by this method. Results obtained by this method are verified, in a broad range of dimensions, by comparing with published results and also those calculated by commercial electromagnetic simulator, HFSS. Electromagnetic band gaps and mode conversion phenomenon as properties of periodic structures are also observed and investigated. Mode conversion in SIW is reported for the first time by our proposed method.
Fast frequency sweep technique for the efficient analysis of dielectric waveguides
IEEE Transactions on Microwave Theory and Techniques, 1997
This paper describes a new approach to spectral response computation of an arbitrary 2D waveguide. This technique is based on the Tangential Vector Finite Element Method (TVFEM) in conjunction with the Asymptotic Waveform Evaluation (AWE) technique. The former is used to obtain modes characteristics for a central frequency, whereas the latter employs an e cient algorithm to compute frequency moments for each mode. These moments are then matched via Pad e approximation to a reducedorder rational polynomial which can be used to interpolate mode over a frequency band with a high degree of accuracy. Furthermore, the moments computations and subsequent interpolation for a given set of frequency points can be done much more rapidly than just simple simulations for each frequency point.
Guided-wave and leakage characteristics of substrate integrated waveguide
IEEE Transactions on Microwave Theory and Techniques, 2005
The substrate integrated waveguide (SIW) technique makes it possible that a complete circuit including planar circuitry, transitions, and rectangular waveguides are fabricated in planar form using a standard printed circuit board or other planar processing techniques. In this paper, guided wave and modes characteristics of such an SIW periodic structure are studied in detail for the first time. A numerical multimode calibration procedure is proposed and developed with a commercial software package on the basis of a full-wave finite-element method for the accurate extraction of complex propagation constants of the SIW structure. Two different lengths of the SIW are numerically simulated under multimode excitation. By means of our proposed technique, the complex propagation constant of each SIW mode can accurately be extracted and the electromagnetic bandstop phenomena of periodic structures are also investigated. Experiments are made to validate our proposed technique. Simple design rules are provided and discussed.
2013 International Conference on Electromagnetics in Advanced Applications (ICEAA), 2013
A full-wave hybrid formulation is proposed for the efficient and accurate modeling of substrate integrated waveguides by rigorously accounting for all possible interactions among elements such as vertical metallic or dielectric posts and coupling or radiating slots. The method is specifically accelerated in order to maximize the efficiency of the analysis of common structures. Its flexibility allows for the study of a large class of devices, possibly in stacked-waveguide configurations, and for the characterization of radiated fields and input port parameters.
Green's function analysis of an ideal hard surface rectangular waveguide
Radio Science, 2005
Green's function analysis of an ideal hard surface rectangular waveguide is proposed for characterization of the modal spectrum of the structure. A decomposition of the hard surface waveguide into perfect electric conductor and perfect magnetic conductor waveguides allows the representation of dyadic Green's function as a superposition of transverse magnetic (TM) and transverse electric (TE) waveguide modes, respectively. In addition, a term corresponding to a transverse electromagnetic (TEM) mode is included in the eigenmode expansion of the Green's dyadic. It is shown that the TEM mode solution can be obtained by solving vector Helmholtz's equation in the zero cutoff limit with the corresponding boundary conditions of electric field on the ideal hard surface. The electric field distribution due to an arbitrarily oriented electric dipole source is illustrated for a few representative TM, TE, and TEM modes propagating in the ideal hard surface rectangular waveguide. The proposed model is verified by analyzing a realistic hard surface square waveguide using the Ansoft High-Frequency Structure Simulator (HFSS).
IEEE Transactions on Antennas and Propagation, 2008
A new efficient technique for computing the Green's functions inside rectangular waveguides is presented. After a summary of the classical approaches and their difficulties, a new strategy is proposed, based on the decomposition of the main spectral series into simpler terms. Although the resulting series present better convergence rate, several acceleration techniques are combined to further improve the efficiency. Several results are presented to demonstrate the improvements in convergence rates obtained using the new decomposition.
Design and Analysis of Substrate Integrated Waveguide
Proceedings of the 1st International Conference on Sustainable Materials, Manufacturing and Energy Technologies, 2022
At microwave and higher frequencies, the need for highly efficient, low cost, high gain, easy to construct, and compact antennas for communication applications has increased. Although, Substrate Integrated Waveguides (SIW) technology is the emerging technology for radar and satellite applications. SIWs are widely employed as interconnection in antennas particularly leaky wave antennas, high speed circuits, directional couplers, and filters because they are having low loss properties of their typical metallic waveguides. A SIW with cylindrical slots is suggested in this work, as well as its integration with a tapered microstrip transmission line.