Figure 2

Figure 2: (a) Demonstration circuit of graphene ambipolar mixers. (b) Spectrum analysis: Output spectrum with RF input fRF=10.5 MHz and local oscillator fLO=10 MHz at equal power. The presence of strong signal power at fRF - fLO=500 kHz and fRF + fLO=21.5 MHz clearly demonstrates mixing operations. All data are obtained using Agilent N9010A spectrum analyzer, and the measurements were done at room temperature in air.

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