Vladimir Litvinov is a principal scientist at Sierra Nevada Corporation, Irvine, CA, USA. He earned his MSc in radiophysics from Ivan Franko University, Lviv, Ukraine; PhD in physics and mathematics from Chernivtsy University, Ukraine; and Habilitation in physics and mathematics from the Institute of Physics, Estonian Academy of Science, Tartu, Estonia. He was a member and then a head of theoretical lab at the Institute of Problems of Materials Science, National Academy of Sciences of Ukraine, from 1978 to 1996. He started working at the Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, USA, in 1996 as a senior research associate. He joined Sierra Nevada Corp. in 1999. He has also served as a principal investigator on projects supported by the U.S. Air Force, Army, and Navy as well as SOCOM, NASA, and MDA. He is a member of IEEE, American Physical Society, and Materials Research Society. His research interests include the theory and modeling in semiconductor physics, III-V and IV-VI semiconductor optoelectronic devices, superlattices, metallic magnetic multilayers, as well as millimeter wave devices and scanning antennas.