Moment method analysis of circularly polarized microstrip antenna with parasitic element

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Original languageEnglish
Pages (from-to)412-419
Journal / PublicationInternational Journal of Microwave and Millimeter-Wave Computer-Aided Engineering
Issue number4
Publication statusPublished - Oct 1993


The circular polarization characteristics of stacked microstrip antennas with a single coaxial feed are analyzed by the method of moments. Green's functions for the patch currents are formulated in the spectral domain. Galerkin's method is employed to determine the input impedance, far-field patterns, impedance bandwidth, beamwidth, and axial-ratio bandwidth. The possibility of improving the axial-ratio bandwidth of the microstrip antenna is demonstrated. Numerical data are obtained to compare with the experimental data available in the literature.