Graphene based active and passive component development on transparent substrates

James H. Schaffner; Kyung-ah Son; Hyok J. Song; Jeong S. Moon; Andrey A. Kiselev; Hwa-Chang Seo; Baohua Yang; Danny Wong

doi:10.1117/12.2053391

9 June 2014 Graphene based active and passive component development on transparent substrates

James H. Schaffner, Kyung-ah Son, Hyok J. Song, Jeong S. Moon, Andrey A. Kiselev, Hwa-Chang Seo, Baohua Yang, Danny Wong

Author Affiliations +

Proceedings Volume 9083, Micro- and Nanotechnology Sensors, Systems, and Applications VI; 90830I (2014) https://doi.org/10.1117/12.2053391
Event: SPIE Defense + Security, 2014, Baltimore, MD, United States

Abstract

Antennas collect radio waves and channel them into radio frequency (RF) transmission lines which direct the signals to circuits from which information can be demodulated and decoded. Glass, the most common portal between outside and inside environments, is clear at the visible part of the electromagnetic spectrum, and it is also relatively transparent to a large portion of the electromagnetic spectrum useful for radio wave communications. Since glass as a building material is used everywhere, it could be a readily accessible substrate upon which to mount or fabricate the antennas and RF electronics, but only if these circuit components are also transparent. In this paper, we present our development to date of glass RF circuits along two tracks: 1) transparent antennas and 2) graphene based active and passive circuit elements. Along the first track we have demonstrated antennas made from nanowire films capable of an optical transparency of 72% and sheet resistance of 4-5Ω/sq. Along the second track, we have in so far demonstrated graphene on glass field effect transistors with an fmax of 7 GHz, varactors with 1.4:1 tuning range, resistors with 3-70 kΩ, and capacitors from 13-860 pF. This is just the start; our plans are to increase the frequency and tuning ranges of the active and passive devices. Since graphene is inherently transparent at visible wavelengths, we ultimately would like to merge these two tracks to integrate active and passive RF circuitry with the antenna either directly on glass or as an applique put on glass, circuits which we’ve termed RF Glass®.

Citation Download Citation

James H. Schaffner, Kyung-ah Son, Hyok J. Song, Jeong S. Moon, Andrey A. Kiselev, Hwa-Chang Seo, Baohua Yang, and Danny Wong "Graphene based active and passive component development on transparent substrates", Proc. SPIE 9083, Micro- and Nanotechnology Sensors, Systems, and Applications VI, 90830I (9 June 2014); https://doi.org/10.1117/12.2053391

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