Qin Zhian

An Approach to the Dyadic Green's Functions for a Rectangular Chirowaveguide

A novel method of formulating eigenfunction expansion of the dyadic Greens function in lossless, recipcocal and homogeneous chirowaveguides is given,using this method, the non-divergence vector potential equation can be transformed into that similar to achiral media,the corresponding wavefield decomposition is used to obtain the vector wave function. A specific application to the analytic solution of electromagnetic wave propagation in a rectangular chirowaveguide illustrates the method.

On the electromagnetic dyadic Green's functions in spectral domain with a chiral medium

A novel method of deriving the electromagnetic dyadic Greens functions in an unbounded, lossless reciprocal and homogeneous chiral medium described by the constitutive relations D/sup /spl omega// = /spl epsi/E/sup /spl omega// + j/spl gamma/B/sup /spl omega// and H/sup /spl omega// = j/spl gamma/B/sup /spl omega// + /spl mu//sup -1/ /spl gamma/J/sup /spl omega// is given. The divergenceless and irrotational splitting of dyadic Dirac /spl delta/ function and Fouriers transformation are used to obtain the divergenceless and irrotational component of dyadic Greens functions in spectral domain with a chiral medium.

An approach to the dyadic Green's functions for a parallel-plate chirowaveguide

A method of the eigenfunction expansion of electromagnetic dyadic Greens functions in a parallel-plate chirowaveguide is given in this paper. By using this method, we can not only obtain the vector wave equations equivalent to that for chiral media but also similar to that for achiral media, the corresponding chiral eigenmodes in parallel-plate waveguides can take a similar form as the conventional achiral eigenmodes also, and then the dyadic Greens functions in a parallel-plate chirowaveguide can take a similar form as the conventional achiral dyadic Greens functions

Splitting of the spectral domain electrical dyadic green’s function in chiral media

A new method of formulating dyadic Greens functions in lossless , reciprocal and unbounded chiral medium was presented. Based on Helmholtz theorem and the nondivergence and irrotational splitting of dyadic Dirac delta-function was this method, the electrical vector dyadic Greens function equation was first decomposed into the nondivergence electrical vector dyadic Greens function equation and irrotational electrical vector dyadic Greens function equation, and then Fouriers transformation was used to derive the expressions of the non-divergence and irrotational component of the spectral domain electrical dyadic Greens function in chiral media. It can avoid having to use the wavefield decomposition method and dyadic Greens function eigenfunction expansion technique that this method is used to derive the dyadic Greens functions in chiral media.A new method of formulating dyadic Green’s functions in lossless, reciprocal and unbounded chiral medium was presented. Based on Helmholtz theorem and the nondivergence and irrotational splitting of dyadic Dirac delta-function was this method, the electrical vector dyadic Green’s function equation was first decomposed into the nondivergence electrical vector dyadic Green’s function equation and irrotational electrical vector dyadic Green’s function equation, and then Fourier’s transformation was used to derive the expressions of the non-divergence and irrotational component of the spectral domain electrical dyadic Green’s function in chiral media. It can avoid having to use the wavefield decomposition method and dyadic Green’s function eigenfunction expansion technique that this method is used to derive the dyadic Green’s functions in chiral media.

The equivalent expression of dyadic Green's function for chirowaveguide

A method of formulating eigenfunction expansion of dyadic Greens function in lossless reciprocal and homogeneous chirowaveguides is given,using this method, the non-divergence vector potential equation can be transformed into that similar to achiral media, the corresponding wavefield decomposition is used to obtain the vector wave function. A specific application to the analytic solution of electromagnetic wave propagation in rectangular chirowaveguide illustrates the method.

A new approach to dyadic Green's function problem of a field vector

A method of deriving directly the irrotational and non-divergence component for the spectral domain dyadic Greens function of a field vector is given. Helmholtz theorem and the irrotational and non-divergence splitting of dyadic Dirac /spl delta/ function are used to obtain the irrotational and nondivergence dyadic Greens function, a specific application to the electromagnetic wave field in chiral media illustrates the method.

The electromagnetic wave field in M and N vector wave function space

The non-divergence vector potential in M and N vector wave function space is respectively separated into a component each one can be expressed by a scalar function, and then the independent separative forms of the non-divergence vector potential and electromagnetic wave field in M and N vector wave function space is studied further.

A novel approach to construct dyadic Green's functions for coaxial cavity

The new method of solving the dyadic Greens functions of the non-divergence electromagnetic field for the coaxial cavity is presented, using this new method, the proper project of non-divergence electro-magnetic field on vector wave function space is given first, and the non-divergence electromagnetic dyadic Greens functions for the coaxial cavity are formulated by using a scalar Greens function.

A novel approach to the Dyadic Green's functions for chiral media

A new method for solving electromagnetic field boundary value problem in chiral media is given in this paper, using this method,the boundary value problem of each wavefield equation derived by the wavefield decomposition method can be transformed into the boundary value problem of a scalar wave equation,the corresponding dyadic Greens function got by the dyadic Greens function eigenfunction expansion method can be got by a Greens function of scalar field.

An approach for solving maxwell equations of electromagnetic field in chiral media

A new method for solving Maxwell equations of electromagnetic field in chiral media is presented. By using this method, the problem of solving the non-divergence electromagnetic field in chiral media can be transformed into the problem for solving a scalar equation.