Segmentation Method Using Impedance Matrices For Analysis Of Planar Microwave Circuits

Chadha, Rakesh; Gupta, K.C.

doi:10.1109/tmtt.1981.1130292

Cited by 138 publications

(32 citation statements)

References 5 publications

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“…In the analysis of irregular patches, whose Green's functions are not analytically available, the segmentation and/or desegmentation techniques are used in conjunction with the multiport analysis [18][19][20]. "Irregular shapes" refers to the microstrip antenna whose patch is cut in different shapes in order to fulfill a specific antenna property such as compactness, wideband characteristics and multiresonant operation.…”

Section: Segmentation Methodsmentioning

confidence: 99%

“…This impedance matrix defines the mutual and self-impedances among the ports and can be obtained analytically only for regularly-shaped patches such as rectangular, triangular and circular patches. For irregularly-shaped patches, such as those with slots, segmentation or de-segmentation methods are used [18][19][20]. In these methods, the overall patch geometry is divided into segments of regular shapes, and the composition or deduction of these regularly shaped patches is considered for segmentation or desegmentation respectively.…”

Section: Introductionmentioning

confidence: 99%

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Multiport Analysis by Padã Approximation

Sener

2012

PIER

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Abstract-In this paper, a new method to analyze arbitrary shaped microstrip patch antennas is introduced. This method uses the multiport network model (MNM) together with a mathematical approximation called the "Padé approximation" such that the antenna input impedance obtained from the multiport analysis is approximated as a rational function of polynomials. Then, the roots of the denominator of this rational function are used to determine the antenna resonant characteristics. This new method is more time efficient than the standard multiport analysis because the evaluations are made at a single frequency. In the standard method, evaluations are made at multiple frequency values throughout the analysis. Results obtained by the new method are verified using the examples of rectangular and slot loaded compact microstrip patch antennas. Computational efforts for both procedures are presented.

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Section: Segmentation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiport Analysis by Padã Approximation

Sener

2012

PIER

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“…Analytical expressions are readily available for simple geometries, and fast algorithms have been developed [31], [32]. Combined with the segmentation technique [33], [34], the cavity model can be used to model arbitrarily-shaped parallel-plane cavities. For multiple overlapping plane structures, a multilayer finite-difference method (MFDM) [35] has been proposed, and demonstrated to be effective in modeling noise coupling between planes.…”

Section: Modeling Noise Coupling In Multilayer High-speed Pcbsmentioning

confidence: 99%

Mitigation of Noise Coupling in Multilayer High-Speed PCB: State of the Art Modeling Methodology and EBG Technology

Fan

Paulis

et al. 2010

IEICE Trans. Commun.

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SUMMARYNoise coupling on the power distribution networks (PDN) or between PDN and signal traces is becoming one of the main challenges in designing above GHz high-speed digital circuits. Developing an efficient and accurate modeling method is essential to understand the noise coupling mechanism and then solve the problem afterwards. In addition, development of new noise mitigation technology is also important for future high-speed circuit systems. In this invited paper, a novel modeling methodology that is based on the physics-based equivalent circuit model will be introduced, and an example of multiple layer PCB circuits will be modeled and validated with good accuracy. Based on the periodic structure concept, several new electromagnetic bandgap structures (EBG), such as coplanar EBG, photonic crystal power layer (PCPL), and ground surface perturbation lattice (GSPL), will be introduced for the mitigation of power/ground noise. The trade/offs of all these structures will be discussed.

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“…The smaller segments can be easily characterized by their impedance matrices, which in turn are connected using network modeling techniques to give the overall impedance matrix of the composite structure. At first, segmentation method was developed using S-parameters for characterizing individual segments [43], but later it was found that Z-matrix formulation was more efficient [44].…”

Section: Derivation Of Green's Function In Terms Of Eigenfunctionsmentioning

confidence: 99%

A Generalized 2-D Multiport Model for Planar Circuits With Slots in Ground Plane

Khajehnasiri

Safavi‐Naeini

2007

IEEE Trans. Antennas Propagat.

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With increasing complexity of microwave integrated circuits and tendency towards building integrated modules, real estate in printed circuit boards becomes more at premium. On the other hand, building MIC's on a single semiconductor substrate such as GaAs has other drawbacks as substrate requirements for different components are sometimes contradictory. This has motivated researchers to consider multi-layer and stacked designs. Multi-layer planar circuits offer advantages that cannot be equalled by traditional single layer designs. In this respect, a new class of planar structures, based upon a multi-layered stack of dual-mode stripline or microstrip patches is becoming increasingly popular. In the new stacked design, coupling between planar circuits separated by a ground plane is accomplished through coupling apertures in the common ground plane.This thesis is about developing an new approximate multiport network model for fast analysis of multi-layered planar structures with ground plane slots. To extend applicability of multiport network model (MNM) to the class of planar structures containing ground plane slots, a generalized network formulation for aperture problems is combined with traditional MNM to account for the presence of the slot. To this end, the slot is replaced by an unknown equivalent surface magnetic current. Slot ports are defined in terms of electric and magnetic fields over the slot in accordance with the generalized network formulation for aperture problems. While traditional MNM for planar circuits is based on generalized impedance matrices, we adopt a hybrid matrix approach for multi-layer structures. The hybrid matrix consists of four sub-matrices that relate terminal voltages and currents of edge and slot ports. The same generalized impedance matrix in the absence of the slot can be used to relate terminal voltages and currents of edge ports when the slot ports are short-circuited. Open circuit voltage at edge ports due to terminal voltages at slot ports and terminal currents at slot ports due to input currents at edge ports are represented by two transfer matrices. Both these transfer matrices can be calculated from 2D analysis which only considers T M z modes.Interaction among slot ports, represented by a generalized admittance matrix, however, requires considering both T M z and T E z modes. This generalized admittance matrix is obtained from tangential component of the magnetic field over the slot due to the equivalent surface magnetic current and relates terminal voltages and currents of slot ports. Full modal expansion consisting of both T M z and T E z modes is used to compute the generalized admittance matrix of a slot in a regularly shaped planar cavity. For irregularly shaped patches, modal expansion is not available. Instead, a new contour integral equation for magnetic field, derived for the iii first time in this thesis, is combined with complex images method for calculation of generalized admittance matrix of a slot radiating in a planar cavity of arbitrary shape.O...

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Segmentation Method Using Impedance Matrices For Analysis Of Planar Microwave Circuits

Cited by 138 publications

References 5 publications

Multiport Analysis by Padã Approximation

Multiport Analysis by Padã Approximation

Mitigation of Noise Coupling in Multilayer High-Speed PCB: State of the Art Modeling Methodology and EBG Technology

A Generalized 2-D Multiport Model for Planar Circuits With Slots in Ground Plane

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Segmentation Method Using Impedance Matrices For Analysis Of Planar Microwave Circuits

Cited by 138 publications

References 5 publications

Multiport Analysis by Padã Approximation

Multiport Analysis by Padã Approximation

Mitigation of Noise Coupling in Multilayer High-Speed PCB: State of the Art Modeling Methodology and EBG Technology

A Generalized 2-D Multiport Model for Planar Circuits With Slots in Ground Plane

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Product

Resources

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Multiport Analysis by Padã Approximation

Multiport Analysis by Padã Approximation