« Slow-wave coupled lines integrated over silicon in mm-wave - Applications to couplers, filters and baluns »
José LUGO ALVAREZ
Monday, December 7, 2015 at 10:30
Abstract : This work focuses on high-performances CS-CPW (Coupled Slow-wave CoPlanar Waveguide) transmission lines in classical CMOS integrated technologies for the millimiter-wave frequency band. First, the theory as well as the electrical models of the CS-CPW are presented. Thanks to the models and electromagnetic simulations, directional couplers with different coupling levels (3 dB, 10 dB, 18 dB) were designed in BiCMOS 55 nm technology. They have a good directivity, always better than 15 dB. A first prototype of a coupler was measured at 150 GHz presenting good agreement with the simulations. Next, coupled-line base filters were developed at 80 GHz using the CS-CPWs. Simulation present competitive results with the state-of-art: 11% of fractional bandwidth and a unload quality factor of 24.6. Finally, three projects started based on the CS-CPWs. The projects are currently used in two theses and one internship: a RTPS at 47 GHz, an isolator at 75 GHz and a balun at 80 GHz.
Members of jury : Philippe FERRARI - Supervisor Florence PODEVIN - Co- supervisor Odile PICON - Rapporteur Jean-Baptiste BEGUERET - Rapporteur Anne-Laure FRANC - Reviewer Didier VINCENT - Reviewer Sylvain BOURDEL - Reviewer Jean-Michel FOURNIER - Reviewer
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Thesis prepared in the laboratory : UMR 5130 - IMEP-LAHC :Institut de Microélectronique, Electromagnétisme, Photonique –Laboratoire Hyperfréquences et Caractérisation , supervised by Philippe FERRARI .