A general conformal-mapping approach to the optimum electrode design of coplanar waveguides with arbitrary cross section

被引：23
|
作者：
Goano, M [1 ]
Bertazzi, F
Caravelli, P
Ghione, G
Driscoll, TA
机构：
[1] Politecn Torino, Dipartimento Elettr, I-10129 Turin, Italy
[2] Univ Delaware, Dept Math Sci, Newark, DE 19716 USA
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2001年 / 49卷 / 09期
关键词：
coplanar waveguides; electrooptic modulation; integrated opto-electronics; skin effect;
D O I：
10.1109/22.942569
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The Schwarz-Christoffel toolbox, a free MATLAB package for the computation of conformal maps, is applied to the quasi-static analysis of coplanar waveguides (CPWs) of arbitrary cross section in order to provide computationally efficient and very accurate estimates of their capacitance, inductance, characteristic impedance, and skin-effect attenuation. A few examples of many-sided polygonal waveguides are discussed, and the trapezoidal CPW, important, for example, for electrooptic modulators, is described in full detail, providing general guidelines for the electrode geometry optimization. The technique is validated through a comparison with the results of a full-wave finite-element method, and excellent agreement is demonstrated both in vacuo and with two-layer dielectric substrates.
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页码：1573 / 1580
页数：8
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