The paper deals with the problem of eigenoscillations near the obstacle with the arbitrary sufficiently smooth shape of boundary immersed in three-dimensional waveguide of rectangular cross-section. Assumed that the g...
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ISBN:
(纸本)078037391X
The paper deals with the problem of eigenoscillations near the obstacle with the arbitrary sufficiently smooth shape of boundary immersed in three-dimensional waveguide of rectangular cross-section. Assumed that the guide and the obstacle are rigid. For a wide range of the obstacle geometry the existence of eigenwaves has been proved and their frequencies are embedded in the continuous spectrum.
A generalization of the Mode Matching Method (MMM) to combine radial waveguides and guides with axial uniformity is presented. When using this generalized MMM, geometries composed of parts described in a cylindrical c...
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ISBN:
(纸本)2960055128
A generalization of the Mode Matching Method (MMM) to combine radial waveguides and guides with axial uniformity is presented. When using this generalized MMM, geometries composed of parts described in a cylindrical coordinate system, and parts described in A rectangular coordinate system, are easily analyzed in the same circuital theory frame. The key of the method is the analysis of a virtual circuit that describes the interaction between cylindrical waves and radial waves and the use of it as building block. The analysis of this virtual circuit is performed though variational formulation based on the concept of reaction.
The field distributions of various modes in rectangular waveguides filled with uniaxial media are presented. The presented cases include aligned cases when the optic axis is parallel to one of the coordinate axes and ...
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ISBN:
(纸本)9789082598704
The field distributions of various modes in rectangular waveguides filled with uniaxial media are presented. The presented cases include aligned cases when the optic axis is parallel to one of the coordinate axes and the tilted cases when the optic axis is not parallel to any of the coordinate axes but still lies within one of the two side-wall planes. In the aligned uniaxial-z case the analytical solution is compared with the results of the dyadic green's functions (DGF). In other aligned cases the field distributions of selected extra-ordinary wave modes are also plotted and to be compared with the isotropic case. In the tilted cases, the field distributions of the hybrid modes which are coupled ordinary-waves and extra-ordinary waves show asymmetry which is not seen in the aligned cases and isotropic case. The validity of the hybrid mode field plots are verified by comparing a limiting tilted case with analytical solutions of an aligned case.
Characteristics of the rectangular waveguides with curved corners is studied. For describing the geometry of the curved-corner rectangular waveguides, the superquadric form is applied. The Ravleigh-Ritz method is used...
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ISBN:
(纸本)078037486X
Characteristics of the rectangular waveguides with curved corners is studied. For describing the geometry of the curved-corner rectangular waveguides, the superquadric form is applied. The Ravleigh-Ritz method is used to study the characteristics of the curved corner waveguide. Finally the results are compared with those obtained by Ritz-Galerkin method and step approximations.
This paper investigates forming rectangular waveguides using printed circuit boards, which would potentially offer an extremely cheap and reliable means of providing a low loss transmission line for high frequency sys...
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In this paper we present an efficient and accurate CAD procedure for the full-wave characterization of in- line coaxial excitations of rectangular waveguides. For the sake of analysis, the structure is decomposed into...
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In this paper we present an efficient and accurate CAD procedure for the full-wave characterization of in- line coaxial excitations of rectangular waveguides. For the sake of analysis, the structure is decomposed into the cascade of uniform waveguide sections. The complete structure is then analvzed using the multiniode admittance method. A very efficient technique is used for the evaluation of the modes and of the coupling integrals. In addition to theory. measured results are also presented thereby fully validating the proposed procedure.
Sharp lossless discontinuities in the walls of a rectangular waveguide operating in the dominant mode are commonly introduced for the sake of matching the waveguide to a given termination or for the transmission and d...
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The antenna for BRASILSAT has to operate over C-Band and has to provide beams for national and regional coverages. In order to simplify computation, we introduce an asymptotic approximation in the expression for the m...
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ISBN:
(纸本)0852965710
The antenna for BRASILSAT has to operate over C-Band and has to provide beams for national and regional coverages. In order to simplify computation, we introduce an asymptotic approximation in the expression for the mutual-admittance similar to the one suggest by Bird in the analysis of mode coupling for a planar circular waveguide array. Here, the use of that approximate expression for the mutual-admittances is explored in the design of such antennas in conjunction with more stringent specifications for BRASILSAT.
The paper presents the results of the research of the Hp0 wave scattering on a T-shaped branching of rectangular waveguides with a transversely magnetized ferrite parallelepiped (FP). The analysis is based on the rigo...
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This package calculates the input admittance versus frequency to an arbitrarily terminated inhomogeneous cascade of rectangular waveguides with or without junction discontinuity effects.
This package calculates the input admittance versus frequency to an arbitrarily terminated inhomogeneous cascade of rectangular waveguides with or without junction discontinuity effects.
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