107-GHz (Al,Ga)N/GaN HEMTs on Silicon With Improved Maximum Oscillation Frequencies Tirelli, Stefano ; Marti, Diego ; Sun, Haifeng ; Alt, Andreas R. ; Benedickter, Hansruedi ; Piner, Edwin L. ; Bolognesi, C. R. Abstract Publication: IEEE Electron Device Letters Pub Date: April 2010 DOI: 10.1109/LED.2009.2039847 Bibcode: 2010IEDL...31..296T