A Short Wavelength and Low Loss Thin-Film Transmission Line Employing ML/CPW Composite Structure on Silicon Substrate

Abstract:

In this work, a thin-film transmission line (TFTL) employing microstrip line/coplanar waveguide (ML/CPW) on silicon substrate was proposed, and its RF characteristics were investigated. The TFTL employing ML/CPW composite structure exhibited the wavelength shorter than conventional coplanar waveguide and thin-film microstrip line. Concretely, at 10 GHz, the wavelength of conventional coplanar waveguide and thin film waveguide is 10.35 and 7.83 mm, while the wavelength of the TFTL employing ML/CPW composite structure was 6.26 mm, which was 60.5 % of the conventional coplanar waveguide. The TFTL employing ML/CPW composite structure with a length of λ/8 showed the loss less than 1.12 dB up to 30 GHz, which was lower than conventional coplanar waveguide and thin-film microstrip line. Above results indicates that the TFTL employing ML/CPW composite structure is a promising candidate for application to a miniaturization of RF components on silicon RFIC.

• Periodical: Applied Mechanics and Materials (Volume 442)
• Pages: 138-141
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.442.138
• Online since: October 2013
• Authors: Ki Jun Son, Jang Hyeon Jeong, Sung Jo Han, Young Yun*
• Keywords: Microstrip Line/Coplanar Waveguide (Ml/CPW) Composite Structure, RFIC, Silicon, Thin-Film Impedance Transformer

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