Moment Method Analysis of a Slot-Coupled Cavity in Rectangular Waveguide

Michael Lancaster, HY Wang, AJ Sangster, J Simkin

Research output: Contribution to journalArticle


A moment method analysis of a cavity coupled to a rectangular waveguide through a longitudinal slot has been developed. In essence, integral equations are derived from boundary conditions, an equivalence principle and appropriate Green's functions. Galerkin's method is employed to transform the integral equations into a matrix equation that is suitable for numerical computation. The effects of the primary parameters, namely slot length, slot positions and the dimensions of the cavity, on resonant frequency and scattering parameters are presented. The simulated results are in good agreement with those obtained from a FDTD 3D simulator.
Original languageEnglish
Pages (from-to)1425-1439
Number of pages15
JournalJournal of Electromagnetic Waves and Applications
Issue number10
Publication statusPublished - 1 Oct 2003


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