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Graphene FET-Based Zero-Bias RF to Millimeter-Wave Detection

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11 Author(s)
Moon, J.S. ; HRL Labs. LLC, Malibu, CA, USA ; Seo, H.-C. ; Antcliffe, M. ; Lin, S.
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We report direct radio-frequency (RF) and millimeter-wave detection of epitaxial graphene field-effect transistors (FETs) up to 110 GHz with no dc biases applied, leveraging the nonlinearity of the channel resistance. A linear dynamic range of >; 40 dB was measured, providing at least 20-dB greater linear dynamic range compared to conventional CMOS detectors at transistor level. The measured noise power of the graphene FETs was ~7.5 × 10-18 V2/Hz at zero bias and without 1/f noise. At a 50-Ω load, measured detection responsivity was 71 V/W at 2 GHz to 33 V/W at 110 GHz. The noise-equivalent power at 110 GHz was estimated to be ~80 pW/Hz0.5. For the first time, we demonstrated graphene FETs as zero-bias ultrawideband direct RF detectors with comparable or better performance than state-of-the-art FET-based detectors without dc biases applied.

Published in:

Electron Device Letters, IEEE  (Volume:33 ,  Issue: 10 )

Date of Publication:

Oct. 2012

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