期刊
IEEE ELECTRON DEVICE LETTERS
卷 33, 期 10, 页码 1357-1359出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LED.2012.2210184
关键词
Energy harvesting; field-effect transistor (FET); graphene; millimeter wave; power detector; rectification; radio-frequency identification (RFID)
资金
- Defense Advanced Research Projects Agency (DARPA) under SPAWAR [N66001-08-C-2048]
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 similar to 7.5 x 10(-18) V-2/Hz at zero bias and without 1/f noise. At a 50-Omega 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 similar to 80 pW/Hz(0.5). 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.
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