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Closed-form expressions for the current distributions on open microstrip lines

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2 Author(s)
Kobayashi, M. ; Dept. of Electr. & Electron. Eng., Ibaraki Univ., Japan ; Sekine, H.

The authors systematically clarify the characteristics of current distributions for various cases of substrate relative permittivity, shape ratio, and normalized frequency. These characteristics are clarified, and closed-form expressions are proposed. An open microstrip line with isotropic dielectric substrate is numerically analyzed by the spectral-domain method to clarify current distributions on a strip conductor. The current distributions obtained are illustrated in figures for typical cases. A full view of current distributions on a strip conductor in any microstrip line is provided by showing those close-form expressions. These expressions for the current distribution have been compared with the theoretical results, and good agreement has been obtained

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:39 ,  Issue: 7 )