Rigorous modal analysis of the asymmetric rectangular iris in circular waveguides

Keller, Reinhard; Arndt, F.

doi:10.1109/75.219809

Cited by 18 publications

(10 citation statements)

References 8 publications

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“…The excitation coefficients can be eliminated by using (3), which yields (5) with (6) The desired full-wave scattering matrix of the general -port waveguide junction is then given by (7) with the identity matrix . …”

Section: B Boundary Contour Mode-matching Methodsmentioning

confidence: 99%

“…It has been demonstrated that merely four mode-matching key building blocks are the basis for the accurate and fast simulation of the comprehensive class of rectangular and circular waveguide structures-the asymmetric rectangular waveguide double-plane step discontinuity [1], [37], the asymmetric rectangular-to-circular [1], [5], and circular-to-circular waveguide step discontinuities [1], as well as the general six-port cross [4] (which is reducible to T-junctions [2], magic-Tee structures [38], or corners by placing adequate short-circuit planes). The combination of these key building blocks with homogeneous rectangular or circular waveguide sections of finite lengths by the generalized scattering matrix (GSM), generalized admittance matrix (GAM), or generalized impedance matrix (GIM) techniques (cf.…”

Section: A Mode-matching Key Building Blocks For Rectangular and Cirmentioning

confidence: 99%

“…The coupling integrals are solved analytically (with the exception of the step discontinuity larger circular-to-smaller rectangular which is calculated as a contour integral numerically by a fast Gaussian quadrature method [5]). Furthermore, for two-port structures, the frequency dependency of the coupling integrals can be eliminated as is already well known [1], [3], [9], [37].…”

Section: A Mode-matching Key Building Blocks For Rectangular and Cirmentioning

confidence: 99%

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Automated design of waveguide components using hybrid mode-matching/numerical EM building-blocks in optimization-oriented CAD frameworks-state of the art and recent advances

Arndt

Beyer

Reiter

et al. 1997

IEEE Trans. Microwave Theory Techn.

Self Cite

115

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Fast hybrid mode-matching/boundary-contour (MM/BC) and mode-matching/finite-element (MM/FE) waveguide building blocks are described for the optimization-oriented use in powerful circuit computer-aided design (CAD) tools and the automated design of waveguide components. The efficient electromagnetic (EM) CAD technique allows the accurate design of a comprehensive class of rectangular and circular waveguide components including realistic structures of higher complexity. The efficiency and flexibility of the hybrid CAD method is demonstrated at advanced EM design examples, such as broad-band circular-to-rectangular waveguide transitions including octagonal cross sections, waveguide resonator filters with rounded corners, optimum-shaped bends, dual-mode filterswith coupling sections without tuning screws, ridged waveguide filters with rounded corners, and multiplexers. The designed components are directly amenable to cost-efficient fabrication techniques like computer-controlled milling methods. The theory is verified by available measurements.

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Section: B Boundary Contour Mode-matching Methodsmentioning

confidence: 99%

Section: A Mode-matching Key Building Blocks For Rectangular and Cirmentioning

confidence: 99%

Section: A Mode-matching Key Building Blocks For Rectangular and Cirmentioning

confidence: 99%

See 1 more Smart Citation

Automated design of waveguide components using hybrid mode-matching/numerical EM building-blocks in optimization-oriented CAD frameworks-state of the art and recent advances

Arndt

Beyer

Reiter

et al. 1997

IEEE Trans. Microwave Theory Techn.

Self Cite

115

View full text Add to dashboard Cite

show abstract

“…The mode-matching solution for the single keybuilding block discontinuities of any two of rectangular and circular waveguides have been presented in [1], [3] and [4], so merely the basic steps are descrbed here using the present notation.…”

Section: Theorymentioning

confidence: 99%

“…1) are decomposed into key-building block discontinuities, such as asymmetric waveguide transitions (rectangular to rectangular [11, circular to rectangular [4] or circular to circular [3]), the key-building block waveguide Nfurcation [7] and T-junction [8] and homogeneous waveguide sections (rectangular or circular).…”

Section: Theorymentioning

confidence: 99%

Optimum CAD of complex rectangular and circular waveguide circuits by combination of field theory with the nodal approach

Keller

Banhardt

Birn

et al. 1995

25th European Microwave Conference, 1995

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A very fast and reliable analysis and optimization tool for complex waveguide structures is presented, wich combines the rigorous mode matching technique with nodal analysis. By this the advantages of both rgorous and fast calculation of waveguide discontinuities by mode matching, and solving of large, arbitrarily meshed circuits by nodal analysis are coupled. Together with a sophisticated gradient optimization procedure, filters, matching networks or couplers consisting of circular and rectanngular waveguides may be optimized. Mechanical tolerances and sensitivity of geometric parameters may be taken into account. The theory is veryfied by measurements.Introduction:

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Mode‐Matching Methods

Arndt¹

2005

Encyclopedia of RF and Microwave Engineering

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The article presents an overview of the state of the art of (mode) matching (MM) methods applied for the rigorous, fast CAD and optimization of waveguide components, and describes some recent advances. The great technical importance of the MM technique is its extremely high computational efficiency achieving complete full‐wave analyses of typical waveguide components several orders of magnitude faster than electromagnetics (EM)‐based methods applying space discretization techniques. Hence, the MM technique allows advantageously the direct EM‐based optimization of waveguide components toward given specifications within shortest response times. Adequate extensions of the MM technique, such as the boundary contour MM (BCMM) method or hybrid combinations with other EM methods such as the finite‐element method, allow extended flexibility. Typical application examples will illustrate the versatility of the MM methods.

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Rigorous modal analysis of the asymmetric rectangular iris in circular waveguides

Cited by 18 publications

References 8 publications

Automated design of waveguide components using hybrid mode-matching/numerical EM building-blocks in optimization-oriented CAD frameworks-state of the art and recent advances

Automated design of waveguide components using hybrid mode-matching/numerical EM building-blocks in optimization-oriented CAD frameworks-state of the art and recent advances

Optimum CAD of complex rectangular and circular waveguide circuits by combination of field theory with the nodal approach

Mode‐Matching Methods

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