Transmission-line matrix analysis of continuous waveguiding structures using stepped-impedance cavities

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Transmission-line matrix analysis of continuous waveguiding structures using stepped-impedance cavities

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© The Institution of Electrical Engineers
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Up to the present time, the t.l.m. method of numerical analysis has found the dispersion characteristics of continuous waveguiding structures by obtaining the resonant frequencies of quarter wavelength cavities. Long cavities requring many nodes have been necessary, and the computer power required for solution becomes excessive as the frequency of interest decreases. This paper shows how cavities of any length may be represented by stepped impedance cavities which, for the t.l.m. method, are only two mesh lengths long for 2-dimensional analysis and 2.5 mesh lengths long for 3-dimensional analysis. The savings in computer time and storage, using the stepped impedance technique, may be of the order of 100 times.

Inspec keywords: computer aided analysis; transmission line theory; waveguides; communications computing

Other keywords: transmission line matrix analysis; numerical analysis; continuous waveguiding structures; stepped impedance cavities; computing

Subjects: Communications computing; Waveguide and cavity theory

References

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      • S. Ahmed , P. Daly . Finite element methods for inhomogeneous waveguides. Proc. IEE , 1661 - 1664
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Erratum: Transmission-line matrix analysis of continuous waveguiding Structures using Stepped-impedance cavities