Transverse Discontinuities in Nonreciprocal Waveguides

Enegren, T.; Kharadly, M.M.Z.

doi:10.1109/tmtt.1980.1130127

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…Once all the submatrices of the square matrix in equation ( 6 ) have been obtained and the eigenvalue system solved, 2NM eigenvalues are obtained, which are the 2NM propagation constants rk ( k = 1,2, ..., N M ) of the proper modes supported by the structure shown in Figure 1. Half of them, i.e.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…This difference in the mathematical process, involving calculation of the amplitudes of the longitudinal components of the electromagnetic field (equations ( 5 ) ) , will be discussed in detail in the next subsection. Once all the submatrices of the square matrix in equation ( 6 ) have been obtained and the eigenvalue system solved, 2NM eigenvalues are obtained, which are the 2NM propagation constants rk ( k = 1,2, ..., N M ) of the proper modes supported by the structure shown in Figure 1. Half of them, i.e.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

See 1 more Smart Citation

Numerical analysis of discontinuities in a rectangular waveguide loaded with isotropic or anisotropic obstacles by means of the coupled‐mode method and the mode‐matching method

Solano

Vegas

Prieto

1994

Int J Numerical Modelling

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SUMMARYA hybrid method obtained as a combination of the coupled-mode method (CMM) and the mode-matching method (MMM) is developed and applied in the analysis of multiple dielectric and magnetic discontinuities in rectangular waveguides. As both are moment methods, some kind of truncation has to be carried out in the computer implementation. It is shown that selection of a different number of modes in the two methods is not necessary, unless low-permittivity media inside the waveguide are considered. As a consequence, the procedure for selecting the number of basis functions is only done in one of the methods. Numerical examples are presented showing the behaviour of the method and the proofs of convergence. Examples are included illustrating the power of this hybrid technique, especially in relation to non-reciprocal structures containing magnetized ferrites.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Theoretical Backgroundmentioning

confidence: 99%

Numerical analysis of discontinuities in a rectangular waveguide loaded with isotropic or anisotropic obstacles by means of the coupled‐mode method and the mode‐matching method

Solano

Vegas

Prieto

1994

Int J Numerical Modelling

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“…An analytical solution and experimental results for an E-plane ferrite-slab-filled rectangular waveguide were presented by O'Brien [10,11]. Enegren and Kharadly [12] used the modematching technique to analyze the scattering problem of transverse discontinuities in nonreciprocal waveguides. Uher, Arndt, and Bornemann [13] used the modal-S-matrix method for designing E-plane ferrite-slab-loaded nonreciprocal waveguide phase shifters with multisection impedance transformers at both ports.…”

Section: Introductionmentioning

confidence: 99%

Mode-matching analysis of H-plane ferrite-loaded rectangular waveguide discontinuities

Shan

Shen

Teo

2003

Int J RF and Microwave Comp Aid Eng

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The full set of eigenmodes existing in a ferrite-slab-loaded rectangular waveguide is first obtained and then used to compute the scattering matrix of a junction between an air-filled rectangular waveguide and an H-plane ferrite-slab-loaded rectangular waveguide by using the mode-matching method. Numerical results for the scattering parameters of the H-plane waveguide discontinuity are compared to experimental data and those obtained by Ansoft's HFSS. Good agreement is observed. To demonstrate the usefulness of this structure, a computer-optimized 90°nonreciprocal phase shifter is designed using an H-plane ferrite-slab-loaded waveguide. With only one-step impedance matching sections at both ends of the ferrite slab, a compact design is achieved to have 2°phase error and less than ؊30 dB return loss over about 5% bandwidth.

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An Investigation of Nonreciprocal Periodic Structures

Enegren

Kharadly

1980

IEEE Trans. Microwave Theory Techn.

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Transverse Discontinuities in Nonreciprocal Waveguides

Cited by 4 publications

References 4 publications

Numerical analysis of discontinuities in a rectangular waveguide loaded with isotropic or anisotropic obstacles by means of the coupled‐mode method and the mode‐matching method

Numerical analysis of discontinuities in a rectangular waveguide loaded with isotropic or anisotropic obstacles by means of the coupled‐mode method and the mode‐matching method

Mode-matching analysis of H-plane ferrite-loaded rectangular waveguide discontinuities

An Investigation of Nonreciprocal Periodic Structures

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