Abstract
An overview of current European coplanar waveguide (CPW) work is presented. Although early work in Europe was directed at developing closed-form analytic expressions for Z/sub 0/ and in /sub eff/ of a number of variants of CPW, much of the current work is application-oriented. Among the topics examined are CPW filters, mixers, couplers, and wideband electrooptic modulators. Work is also in progress on developing CAD (computer-aided design) data for CPW discontinuities, while theoretical work continues.

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