Tuesday, July 28
9:00 am PT
James M. Schellenberg, QuinStar
(advance registration required)
The emergence of 5G cellular technology is driving new interest in the millimeter-wave (mmWave) spectrum. This frequency band (30-300GHz) remains a great untapped resource that must be utilized in order to realize the 5G and beyond goals of the internet and cell phone industries. There simply is not enough bandwidth at lower frequencies to satisfy future system requirements for speed and capacity. The mmWave spectrum is also of great interest to military and industrial planners, where the enhanced resolution provided by greater bandwidths is necessary to meet future system goals. Fortunately, a new device/materials technology has emerged that can meet these requirements: gallium nitride (GaN) on silicon (SiC) substrates. Monolithic microwave integrated circuits (MMICs) fabricated with this high bandgap material offers a 10x improvement in power density compared with older technologies such as gallium arsenide (GaAs) and indium phosphate (InP).
This webinar will focus on GaN MMIC technology and how it can address industry (commercial and military) power needs at mmWave frequencies. The current status of the technology is in terms of power, efficiency and frequency will be explained, followed by a discussion of where it is headed. The factors limiting performance and cost, as well as possible solutions, will also be discussed.
James M. Schellenberg received his BSEE from California State University, Fresno, and his MSEE from Johns Hopkins University. He has worked for Westinghouse Electric Corporation, Hughes Aircraft Company, and Schellenberg Associates, Trex Enterprises, and QuinStar Technology. Mr. Schellenberg is the inventor of the radial-line power combiner and the Dolph-Chebycheff planar power combiner and has pioneered the development of hybrid/monolithic field-effect transistor (FET) amplifiers/oscillators at millimeter-wave frequencies. He received the 1978 IR-100 Award for the FET radial line power combiner and the 1981 ISSCC Beatrice Winner Award. He is the author of eight U.S. patents and more than 50 technical papers.