2D numerical simulation for InGaP/GaAs HBT safe operating area

Abstract

Microwaves play a huge role in space technology. Virtually all communications with vehicles for space exploration is carried on with microwaves. Microwave remote sensing is a field driven by advances in space technique and sensor design. Space-based solar power systems convert sunlight to microwaves outside the atmosphere. However, one of the most fascinating field of microwave study in space concerns with the mysteries of the origin and evolution of the Universe and the fundamental laws on the Nature. Sensitive receivers detect the microwave radiation from stars, galaxies and, specially, the cosmic microwave energy from the Big Bang. The observation of microwaves emission from Ultra-High Energy Cosmic Rays showers has opened a golden channel for the detection of these particles, promising messengers of the world of the Strings and Dark Matter. 12:15h -13:00h Microwave Sensors and Technologies for Earth ObservationLuigi Pasquali, CEO of Telespazio, Italy&FranceThe deployment of a number of microwave sensors for Earth Observation from satellite characterized last decade and as well as the next few years the launch of Copernicus sentinels. A variety of sensors to contribute to a better knowledge of our Earth with remarkable fall outs in terms of scientific application and commercial services. The speech will give a quick overview focusing the key role of microwave technologies and the remarkable positioning of European actors. MONDAY AbstractThis full-day course addresses the fundamental topic of stability in nonlinear microwave circuits and networks (MCNs), covering concepts, qualitative analysis, simulation, and engineering design. The many unique qualitative behaviors possible in commonly used nonlinear MCNs will be illustrated, as well as the fundamental means by which these behaviors can abruptly arise with parameter changes (termed a bifurcation). Course attendees will learn about different types of steady-state solutions, identify instability problems through small-and large-signal stability analysis in the time/ frequency domains, and understand the dynamical mechanisms responsible for instabilities. The primary approaches for stability analysis will be presented and compared, ranging from the familiar and often inadequate (e.g., Rollet factor, stability circles) to the advanced that can be implemented using classical harmonic balance methods. The most common bifurcations will be described, enabling designers to confidently identify them in measurement and simulation. Practical examples of instability, stability analysis, and stabilization design will be presented for such important nonlinear circuits as power amplifiers, frequency multipliers/dividers, and voltage-controlled oscillators. Other advanced topics covered include stability analysis for modulated signals and of coupled oscillators. Finally, the vast research area on harnessing nonlinear dynamics for useful engineering purposes will be surveyed, providing a glimpse into future nonlinear designs. The course will include video/hardware demonstra...