Optimization of radiation efficiency for a transverse ground-plane slot in boxed-stripline

A. J. Sangster, P. Smith

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


A stripline-excited cavity-backed transverse slot radiator is analyzed using a moment method. The analysis solves a pair of simultaneous integral equations that describe the magnetic fields in the vicinity of the slot, in terms of the tangential electric fields of the upper and lower surfaces of the slot, and the Green's functions for the neighbouring regions. A comprehensive dyadic Green's function is developed to model the feedline structure for the practical case where the central conducting strip is located entirely under the radiating slot. Computed results for resonant length and resonant resistance are analyzed and compared with measured results, while the computational efficiency of the analytical model is established by investigating its convergence properties. An examination of scattering as a function of the parameters, slot offset and strip impedance shows how the efficiency of the coupling between the feedline and the radiating slot can be optimized.

Original languageEnglish
Pages (from-to)509-516
Number of pages8
JournalIEE Proceedings - Microwaves, Antennas and Propagation
Issue number6
Publication statusPublished - Dec 1994


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