The complete solution for normal modes in a resistive-film-loaded rectangular waveguide is due to H.L. Knudsen. He showed how to solve the boundary-value problem of a guide divided into homogeneous regions by a number...
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A full-wave method, which combines the efficiency of mode matching method with the versatility of finite difference method, is applied to the analysis of H-plane mitered bends in rectangular waveguide. The bend is seg...
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This paper presents a rigorous analysis of rectangular waveguides partially or completely filled with a longitudinally magnetized ferrite (LMF) slab. In these problems, the interface between the dielectric and the fer...
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This paper presents a rigorous analysis of rectangular waveguides partially or completely filled with a longitudinally magnetized ferrite (LMF) slab. In these problems, the interface between the dielectric and the ferrite or between the conducting walls and the ferrite represent a discontinuity problem that requires an infinite expansion of waves in each subregion. The analysis is based on the mode matching and the transverse resonance techniques which are combined in such a way as to provide saving in CPU time and memory size requirements. The modes in ferrite region have, in general, complex propagation constants in the transverse direction. Numerical examples are given for different cases and compared with the published data.
A metallic strip on a dielectric substrate placed in the E-plane of a rectangular waveguide is used to make millimetric wave bandpass filters. In this paper the least squares boundary residual method (LSBRM) is employ...
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ISBN:
(纸本)0780375149
A metallic strip on a dielectric substrate placed in the E-plane of a rectangular waveguide is used to make millimetric wave bandpass filters. In this paper the least squares boundary residual method (LSBRM) is employed for the mode matching technique to analyze and determine the equivalent circuit of an E-plane metallic strip on a substrate. In this method, an error function is constructed using the E-and H-field boundary conditions over the interfaces between various waveguide sections. The minimization of the error function determines the amplitudes of the excited modes. The weighting factors, which multiply various terms of the error function, provide some flexibility for the proposed method. The results obtained by LSBRM compare well with those available in the literature.
A complete procedure has been carried out for the analysis and the design of a class of leaky-wave antennas based on 'stepped' rectangular waveguides, introducing a new topology which results quite advantageou...
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This paper describes the application of the Boundary Integral - Resonant Mode Expansion method to the modeling of a conducting post in a rectangular waveguide. The mathematical model of this structure is determined in...
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Rigorous design method for matching right-angle E-plane bends in rectangular waveguide, based on full wave analysis of the device, is presented for the first time. This procedure allows to achieve significant improvem...
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ISBN:
(纸本)0946821429
Rigorous design method for matching right-angle E-plane bends in rectangular waveguide, based on full wave analysis of the device, is presented for the first time. This procedure allows to achieve significant improvement for corner mismatch respect to the empirical mitered solution. Moreover, this design method, utilizable also for millimeter-wave guides, allows the phase of transmission parameter to be known carefully. That is important in some applications like, for instance, beam forming networks. The theory is verified by measurements.
It may be helpful to use a rectangular geometry for the output window in high power gyrotrons. Coupling through the window might be to an overmoded corrugated rectangular waveguide on the other side. The radiation pat...
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ISBN:
(纸本)0819413925
It may be helpful to use a rectangular geometry for the output window in high power gyrotrons. Coupling through the window might be to an overmoded corrugated rectangular waveguide on the other side. The radiation patterns of such waveguides and the efficiency of coupling to them is discussed in this paper.
This paper describes a number of oversized rectangular waveguides with impedance walls, so-called "the hollow dielectric canal waveguides" (EDC-waveguides). Attenuation in HDC-waveguides reduces with decreas...
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This paper describes a number of oversized rectangular waveguides with impedance walls, so-called "the hollow dielectric canal waveguides" (EDC-waveguides). Attenuation in HDC-waveguides reduces with decreasing the wavelength, that makes it possible to use these waveguides in millimetre, sub-millimetre and infrared waveranges. Besides, some results of investigation of wave transmission through the regular and irregular HDC-waveguides are considered, and several waveguide components are represented.
This work introduces Maxwell's equations in their time domain fractional derivatives form. Some special cases of fractional order wave equations are shown. Studying the effect of fractional-order derivatives with ...
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This work introduces Maxwell's equations in their time domain fractional derivatives form. Some special cases of fractional order wave equations are shown. Studying the effect of fractional-order derivatives with respect to time on the generalized analysis and fundamentals of the rectangular waveguide is the main focus of this work. The effect of the fractional-order parameters on the waveguide properties is shown. Some of these properties are cutoff frequency and attenuation that are no longer fixed but controllable by the fractional parameters. Also, the intrinsic impedance is shown to be complex in value. The analysis of the conventional rectangular waveguide as a special case from the fractional-order study when the fractional-orders equal “1” is verified.
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