Mazumder, S. R.Azizi, A.Gardiol, F. E.2006-11-302006-11-302006-11-30197910.1109/TMTT.1979.1129644https://infoscience.epfl.ch/handle/20.500.14299/236819Improvement of a class C transistor amplifier by second harmonic tuningtext::journal::journal article::research article