Quasistatic capacitance and frequency-dependent effective permittivity of multilayer microstrip patch antennas

P. Lowes, S. Scott, E. Korolkiewicz, A. Sambell

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5 Citations (Scopus)


A variational method in the spectral domain is used to determine the quasistatic capacitance of a patch antenna within a nonhomogeneous multilayer structure. The patch is modelled both by a one dimensional analysis using a segment of an infinite transmission line and by a full two-dimensional representation. A new technique is presented for determining the relative permittivity of an equivalent single-layer structure, from which the frequency-dependent effective permittivity is obtained. Results for a number of different antenna structures are given and show good agreement with measured values.

Original languageEnglish
Pages (from-to)75-79
Number of pages5
JournalIEE Proceedings: Microwaves, Antennas and Propagation
Issue number1
Publication statusPublished - 1 Feb 1998
Externally publishedYes

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