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Analysis of stacked microstrip patches with a mixed potential integral equation

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3 Author(s)
L. Barlately ; Lab. d'Electromagn. et d'Acoust., Ecole Polytech. Federale de Lausanne, Switzerland ; J. R. Mosig ; T. Sphicopoulos

A method based on the mixed potential integral equation for the analysis of flat microstrip antennas in a double-layer substrate is presented. The method is used to compute the input impedance of a stacked patch configuration. This structure permits a larger bandwidth and may also provide dual-frequency operation. The Green's functions are discussed in detail, and numerical results are obtained for the propagation constant of the dominant surface wave. Theoretical and experimental results are compared for a dual-frequency and a broadband stacked patch antenna. Theoretical results for the input impedance are in good agreement with measurements. The difference between theoretical and experimental results for the resonant frequency is less than 4.5% in all cases

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:38 ,  Issue: 5 )