Figure 1

Figure 1: (a) Experimental demonstration of frequency doubling measured by an Agilent DSA90604A oscilloscope. The input is at 3 GHz. The output fundamental frequency is 6 GHz. (b) Power spectrum of the output signal from the graphene frequency doublers. The input is at 8 GHz. Frequency doubling is clearly visible. The signal power at fout=2fin=16 GHz is about 10 dB higher than signal power at fout= fin=8 GHz without filtering. More than 90% of the total RF power in the output signal is at 16 GHz. All data are obtained using Agilent N9010A spectrum analyzer.

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    Akintunde Akinwande Anantha Chandrakasan Brian Wardle Carlijn Mulder Carl Thompson Caroline Ross Charles Sodini Chih-Hao Chang CICS Clifton Fonstad Dana Weinstein Dimitri Antoniadis Duane Boning Eugene Fitzgerald Faraz Najafi Francesco Marsili George Barbastathis Hae-Seung Lee Harry Tuller Ichiro Masaki Jason Sussman Jeffrey Lang Jesus del Alamo Jing Kong Joel Dawson Joel Voldman Jongyoon Han Judy Hoyt Karen Gleason Karl Berggren Lan Wei Luca Daniel Luis Velásquez-García Marc Baldo Omar Mysore Philip Reusswig Rajeev Ram Sang-Gook Kim Sangeeta Bhatia Scott Manalis Sean Bishop Tomas Palacios Vitor Manfrinato Vladimir Bulovic Vladimir Stojanovic