In this work, a simple, fast, and accurate optimization approach based on a differential evolution (DE) algorithm is presented to obtain closed‐form formulas for the synthesis of coplanar strip (CPS) lines. The results obtained from the synthesis formulas proposed in this work are compared with the results of quasi‐static analysis and the other synthesis formulas previously published in the literature. The accuracy of the proposed synthesis formulas is found to be better than 1.22% for 2524 CPS samples. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1133–1137, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21559

This article presents new and accurate synthesis formulas for the microcoplanar stripline (MCS). The synthesis formulas are obtained by means of a differential evolution algorithm, and are useful to microwave engineers for accurately calculating the physical dimensions of MCS. The average percentage error is calculated to be 0.9% for 2254 MCS samples having different electrical parameters and physical dimensions, as compared with the results of the quasi‐static analysis. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2884–2888, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23823

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This paper presents new, very simple, accurate closed‐form formulas obtained by using the curve‐fitting technique for coplanar waveguide synthesis. The results achieved from this work are compared to the results obtained from the quasi‐static analysis and the synthesis formulas proposed by other researchers, as well as experimental works available in the literature. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 41: 49–53, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20043

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