Andrei Grebennikov is a senior member if IEEE.  His scientific and engineering activity includes the design and development of RF and microwave power amplifiers for different powers and bandwidths, single-frequency and voltage-controlled oscillators, modulators, mixers and multipliers using any types of bipolar and field-effect transistors.  In addition to this, Andrei has experience reading lectures and classes in microwave & RF engineering as well as training and technical presentations for RF design engineers.