ISSN:0272-6343    

DOI:10.1080/02726349308908326

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

A very accurate mathematical model for the evaluation of the backscattering by a perfectly conducting 90°dihedral corner has been developed. It has been obtained by adding the Physical Theory of Diffraction (PTD) correction term to the Improved Physical Optics (IPO) model, which takes into account also the lighting of each face by the rays diffracted from the edge of the other one. The agreement of such a model with the experimental results has been found very good.

ISSN:0272-6343    

DOI:10.1080/02726349308908327

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

A new numerical method, iterative loop-EMF method, for quantifying the induced EM field in a finite, heterogeneous, non-magnetic body irradiated by an incident EM field has been developed. In this method, the body is modeled by an impedance network and Faraday's law is used to relate the induced loop electric field (or current) to the induced magnetic field. In the mean time, a coupled tensor field integral equation is used to iterate the induced electric and magnetic fields. This method can improve numerical accuracy of the existing tensor electric field integral equation method. The theoretical analysis and numerical examples are both presented. Good agreement is obtained by the comparison with the previous published results.

ISSN:0272-6343    

DOI:10.1080/02726349308908328

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

A new method is presented for transient analysis of coupled dispersive lossy multiconductor transmission lines with arbitrary linear or non–linear terminations, based on an Extended Scattering Matrix (ESM) formulation. This method guarantees short time domain Green’s functions, a fast simulation algorithm and relatively small memory requirements. At each point in time, both sides of the transmission line structure are represented by an extended Thevenin (or Norton) model, consisting of a real constant impedance (or conductance) matrix and a time dependent voltage (or current) source vector. This equivalent model can be implemented in existing simulation programs. Some examples with linear and non–linear loads are presented to illustrate our approach.

ISSN:0272-6343    

DOI:10.1080/02726349308908329

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

A full-wave, integral equation method is presented which generalizes the treatment of multi-layer substrates and superstrates for shielded circuits so that any combination and number of layers can be handled without reformulation. A vector wave function approach with dyadic analysis is used to expand the fields, producing all components of the dyadic Green's functions in one solution. The approach makes application to the analysis of shielded transmission lines very straightforward including the calculation of the fields in all layers. Application to the determination of fundamental properties of strip transmission lines are emphasized in the examples provided.

ISSN:0272-6343    

DOI:10.1080/02726349308908330

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0272-6343    

DOI:10.1080/02726349308908331

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

A vector field can be split into an irrotational part (curl = 0) and a solenoidal one (div = 0). This tutorial paper discusses under which conditions such a splitting is unique, both in infinite space and in a finite volume. In the latter case, multiply-bounded and multiply-connected regions must be considered separately, and electric and magnetic splittings are possible, depending on the boundary conditions imposed on the potentials.

ISSN:0272-6343    

DOI:10.1080/02726349308908332

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Integral equation formulations are used for the modelling of axisymmetric perfectly or imperfectly conducting scattercrs (the Leontovich boundary condition is then assumed to be verified). Our emphasis in this paper is to consider bodies that are large compared to the wavelength. We outline the methods implemented, some of which are original. Particular care has been taken in order to suppress the spurious internal resonances and to minimize the amounts of computer time and memory storage. The numerical examples presented, performed on a wide variety of objects, show that a. high degree of numerical accuracy is achieved in the high frequency domain even in the angular range where the Radar Cross Section is low.

ISSN:0272-6343    

DOI:10.1080/02726349308908333

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor