Analysis of Scattering From Arbitrary Configuration of Cylindrical Objects Using Hybrid Finite-Difference Mode-Matching Method

Kusiek, Adam; Mazur, J.

doi:10.2528/pier09072804

Cited by 25 publications

(25 citation statements)

References 32 publications

(67 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of post from Fig. 3(a) the variation of field along z-axis is assumed as e jk z,p z and region I is discretized only in z-const plane [29]. On the other hand, when the post from Fig.…”

Section: Z-matrix Of the Post Using Fdfd Methodsmentioning

confidence: 99%

“…For objects with regular geometry the impedance matrix can be determined utilizing analytical techniques [22]. However, in the case of objects with irregular shape we utilize finite difference-frequency domain (FDFD) technique [28][29][30] which will be described in the next section. Since, the Z-matrix is known it can be utilized to determine the transmission matrix T of the object:…”

Section: T-matrix Of An Isolated Scatterermentioning

confidence: 99%

See 1 more Smart Citation

Hybrid Technique for the Analysis of Scattering From Periodic Structures Composed of Irregular Objects

Kusiek¹,

Lech²,

Mazur³

2013

PIER

Self Cite

View full text Add to dashboard Cite

Abstract-In the paper, the analysis of electromagnetic wave scattering from multilayered frequency selective surfaces is presented. The surface is composed of periodically arranged posts with irregular shapes. The multimodal scattering matrix of such structure is derived and the transmission and reflection characteristic for the structure with arbitrary plane wave illumination are calculated. The exact fullwave theory based on the hybrid approach employing mode-matching method and finite-difference frequency-domain (FDFD) technique is applied to develop an efficient theory to analyze such structures. The validity and accuracy of the approach are verified by comparing the results with those obtained from alternative methods and own measurements of manufactured periodic structures.

show abstract

Section: Z-matrix Of the Post Using Fdfd Methodsmentioning

confidence: 99%

Section: T-matrix Of An Isolated Scatterermentioning

confidence: 99%

Hybrid Technique for the Analysis of Scattering From Periodic Structures Composed of Irregular Objects

Kusiek¹,

Lech²,

Mazur³

2013

PIER

Self Cite

View full text Add to dashboard Cite

show abstract

“…Some of these methods are aiming at speeding up the matching process [2][3][4], while some others are aiming at improving the robustness [5,6]. Most existing drawbacks have been extensively solved subjected to given backgrounds, however, these methods have not reached a point that can be easily adopted into a practical system and expected to perform reliably well on various backgrounds.…”

Section: Introductionmentioning

confidence: 99%

A Fast and Robust Scene Matching Method for Navigation

Ren¹,

Chang²

2014

PIER M

View full text Add to dashboard Cite

Abstract-The selection of matching method is critical to the scene matching navigation system, as it determines the accuracy of navigation. A coarse-to-fine matching method, which combines the area-based and feature-based matching method, is presented to meet the requirements of navigation, including the real-time performance, the sub-pixel accuracy and the robustness. In the coarse matching stage, the real-time performance is achieved by a pyramid multi-resolution technique, and the robustness is improved by multi-scale circular template fusion. In the precise matching stage, an improved SIFT method is introduced to calculate the matching position and the rotation angle. To validate the method, some experiments are completed. The results show that the proposed method can achieve the sub-pixel matching accuracy and improve the angle accuracy to 0.1 • .

show abstract

“…Although these resonators or other modified versions of them such as hexagonal [2][3][4] and spiral resonators [5,6] have been used to realize canonical [7][8][9][10][11][12][13], dual [14][15][16][17][18][19][20][21], triple [22,23] and quadpassband filters [24] with complicated transmission characteristics, all of these filters suffer from the time consuming full-wave-based process of determining the physical parameters of the filter from the desired coupling factor and Q ext . The ability of soft computing techniques in modeling complicated problems in a vanishingly short time instead of using numerical or analytical approach [25][26][27][28][29][30][31][32] may provide a fast and accurate solution to this problem. Among the soft computing techniques the ability of fuzzy inference method in solving complicated electromagnetic problems such as microwave filter tuning [33,34], EMC problems [35], resonant frequency computation [36,37], determination of the transmission lines characteristic parameters [38], determination of the relative magnetic permeability [39] and also antenna modeling [40][41]…”

Section: Introductionmentioning

confidence: 99%

Active Learning Method for the Determination of Coupling Factor and External Q in Microstrip Filter Design

Rezaee¹,

Tayarani²,

Knöchel³

2011

PIER

View full text Add to dashboard Cite

Abstract-In the final step of any filter design process, the desired center frequency, coupling factor and external quality factor (Q ext ) are used to determine the physical parameters of the filter. Although in the most cases the physical dimensions of a single resonator for a given center frequency are determined using exact analytical or simple approximate equations, usually such simple equations cannot be found to easily relate the required coupling factor and Q ext to the physical parameters of the filter. Analytical calculation of coupling factor and Q ext versus dimensions are usually complicated due to the geometrical complexities or in some cases such as microstrip resonators due to the lack of exact solution for the field distribution. Therefore coupling factor and Q ext of various kinds of resonators, especially microstrip resonators, are related to the physical parameters of the structure by the use of time consuming full wave simulations. In this paper a surprisingly fast and completely general approach based on a soft computing pattern-based processing technique, called active learning method (ALM) is proposed to overcome the time consuming process of coupling factor and Q ext determination. At first the ALM technique and the steps of modeling are generally described, then as an example and in order to show the ability of the method this modeling approach is implemented to model the coupling factor and Q ext surfaces of microstrip open-loop resonators versus physical parameters of the structure. Using the ALM-based extracted surfaces for coupling factor and Q ext , two four pole Chebychev bandpass filters are designed and fabricated. Good agreement between the measured and simulated results validates the accuracy of the proposed approach.

show abstract

Analysis of Scattering From Arbitrary Configuration of Cylindrical Objects Using Hybrid Finite-Difference Mode-Matching Method

Cited by 25 publications

References 32 publications

Hybrid Technique for the Analysis of Scattering From Periodic Structures Composed of Irregular Objects

Hybrid Technique for the Analysis of Scattering From Periodic Structures Composed of Irregular Objects

A Fast and Robust Scene Matching Method for Navigation

Active Learning Method for the Determination of Coupling Factor and External Q in Microstrip Filter Design

Contact Info

Product

Resources

About